Terms of Service

Last updated: February 11, 2026.

Introduction

These Terms of Use (“Terms”) govern your rights and use arising from your access to and use of this website nostalgie.world (the “Site”), including all content, the tools, applications, functionality, subdomains and services offered on or through the Site, including any mobile application experiences we offer under the Site and its subdomains (collectively, the “Services”). These Services may include interactive self-reflection flows, onboarding questionnaires (“assessments”), and personalized outputs (such as reports, plans, or summaries) generated based on user-provided answers, including the Soft Reset experience. All transactions (including any trials, subscriptions, or one-time purchases, where offered) are processed through the checkout and billing flow presented to you at the point of purchase.

The Site is the property of Stefanos D. Zafeiriou’s sole proprietorship with the distinctive title SAPHIRE, based in Greece (G.E.MI. Number:162749406000) (“Saphire”, “Saphire Labs”, “we”, “us” or “our”), and created to offer information and services to visitors/users (also referred to herein as “user”, “you” or “your”).

Navigating the pages of the Site and using the content, tools, applications, functionality and services offered on the Website, implies the unreserved acceptance by the user of the Terms of Service included in this text and it is presumed that the user has studied, understood and accepted all the present terms and conditions of use expressly, unconditionally and irrevocably.

In the event that the visitor/user does not agree to these Terms of Service, they should not access or use the Site and content.

Eligibility. The Site is intended for users 18 years of age or older. Minors are prohibited from visiting the Site as according to this law it is intended exclusively for adults. If minors make the website voluntarily or use services accessible through the pages of the Site, which may be considered inappropriate or inappropriate for them, the administrators of the Site bear no responsibility.

Definitions

“Account” means the authenticated user profile used to access certain parts of the Services.

“Assessment” means any questionnaire, onboarding flow, quiz, or set of prompts presented through the Services (including the Soft Reset assessment).

“Content” means text, graphics, audio, video, templates, and other materials made available on or through the Services.

“Paywall” means any screen or step that requires a purchase to unlock access to gated features (including access to the Report).

“Report” means any personalized output generated through the Services based on your self-reported answers (including any plan and the consolidated Report made available after completing an Assessment).

“Platform” means the online software environment through which the Services are made available (including authenticated areas that require an Account), whether accessed via the Site, a subdomain, or a mobile application.

“Services” means the Site and the related tools, applications, functionality, and services offered by us, including the Platform.

“Site” means nostalgie.world and its subdomains.

“User Content” means any information you submit through the Services, including your answers to Assessments and any other inputs you provide.

The Site and all of its content, features, subdomains and functionality (except for expressly stated exceptions and those clearly stated to be owned by third parties “third-party copyrights”) and all other materials contained therein , including but not limited to all information, logo and all design elements, marks, Website designs, text, graphics, images, photographs, music, sounds, data, screens, video and audio, distinctive features, software and files, their selection and arrangement and other content (collectively “Site Content”), are the property of Saphire, its licensors or other providers, as applicable, and are protected by copyright, trademark, service mark, trade secret or other intellectual rights and other rights and from applicable national, European and international law.

It is expressly prohibited in any way to use, copy, store, print, interfere, transfer, reproduce, republish, retransmit, publish, upload, post, publicly display, encode, translate, distribute, sell and modify Saphire’s content, in whole or in part , in any way by anyone, or license or otherwise use the Site and its content for any commercial purpose, without the prior permission of the business.

You hereby acknowledge and agree that all of Saphire’s content is the intellectual property of the above company. Content that is expressly identified as the property of third parties and is not owned by Saphire is not covered by this license. For the use and exploitation of the content of third parties, the interested party should refer to the beneficiaries of the relevant rights.

For any information regarding the rights to reproduce any part of the content, as well as requests for permission to reproduce content, you can contact Saphire, from the relevant section on the Website.

2. Prohibited uses – Restrictions

Users accept and agree that they will only use the Site for lawful purposes and any applicable laws or regulations and in accordance with these Terms and Conditions of Service, subject to, among others, the legislation regarding the transmission of data from Greece to its member states European Union and third countries.

Users acknowledge and agree that they shall not, nor permit any third party to make or attempt to make use of Site including but not limited to:

  1. Install, promote and/or make available content that contains software viruses or any other electronic code, files or programs designed to interfere with, limit or destroy the operation of any software or telecommunications equipment, or introduce any other material that is malicious or technologically harmful or endanger the security of the Website.
  2. Use the Site in any manner that could disable, overburden, damage or affect the Site or interfere with any other party’s use of the Website.
  3. Use any device, software or routine that interferes with the proper functioning of the Site or prevent other visitors from using this website.
  4. Engage in any automated use of the system, such as using scripts to send comments or messages or using any data mining, robots or similar data collection and extraction tools.
  5. Use any technology to collect information about the Site for any unauthorized purpose.
  6. Attempt to gain unauthorized access to, interfere with, damage or disrupt any parts of the Site, the server on which the Site is stored or any server, computer or database connected to the Site or interfere with any way to the proper functioning of the Site and/or its Content.
  7. Send, upload, distribute or disseminate any illegal, offensive, defamatory, harassing, abusive, fraudulent, violent, obscene or any other objectionable content.
  8. Participate in or engage in, promote or encourage illegal activities.
  9. To upload, publish, transmit or make available in any way through the Site any content that: i) infringes the intellectual property or proprietary rights of any party or infringes in any way the legal rights of third parties, ii) offends the personality of third parties, iii ) is contrary to the law, fair and commercial ethics, iv) in any way intrudes on the privacy and individual and social rights of third parties or v) remove any copyright, trademark or other proprietary rights notices contained on the Site or any part thereof.
  10. To install and promote, in any way, any kind of unsolicited or unauthorized advertising or unsolicited electronic messages (spam), pyramid schemes and any other form of unwanted content promotion, as well as to install and promote advertisements without the written consent consent of the owners.
  11. Mislead anyone as to the origin of the Site Content, damage the reputation of the owners or third parties in any way, prevent any user from accessing the Site, the content or any service contained therein or circumvent the control of their identity.
  12. Use the Site for any unauthorized commercial purpose or use the Site as part of any attempt to compete with us.

Users are solely responsible for their own conduct while accessing or using the Site and for any consequences thereof. In any case of illegality or contrary to these terms of service, users are obliged to compensate the owner for any positive and consequential damages. The beneficiaries’ non-exercise of their rights does not imply a waiver of these rights.

The Site may contain links to other websites and resources (“Third Party Websites”). These links are provided solely for the convenience of users, while the websites to which they refer are subject to the respective terms of use of those websites.

You acknowledge that Saphire does not own or control any third party website, content, product, service, which the user may need to access for the purposes of using the services offered through the Site (e.g. provider services); the providers of which also have full responsibility for the security, legality and validity of the content of their websites and services.

The existence of “links” does not constitute an indication of approval or acceptance of the content of the respective third-party websites (links) by Saphire or the company, which does not bear, vis-à-vis visitors/users, any responsibility for any activities of third-party websites or resources, products, services, content or promotions owned, controlled or operated by third parties and makes no representations or warranties about any third party content.

If you decide to access any of the third-party websites linked to the Saphire Site, you agree that you do so entirely at your own risk and are therefore required to comply with the terms of use and privacy policies applicable to those third-party websites and address directly to their providers for anything arising from visiting and/or using them.

Each user hereby expressly waives and releases Saphire from all liability arising from the user’s visit to and/or use of any resources, products, services or content or participation in third-party website promotions.

The owner of the Site is not responsible, vis-à-vis visitors/users, for any leakage of their personal data due to their use, through the Website’s pages of products and services of third parties.

The user further acknowledges and agrees that Saphire bears no responsibility towards the visitor/user and is not responsible, directly or indirectly, for any loss or damage that may occur as a result of the use, access or inability to use the third party content parties even if such third party websites or resources are linked to Saphire partners or third party service providers.

We do not control and are not responsible for third-party websites or services. Your use of third-party websites is at your own risk and subject to their terms and policies.

Affiliate Disclosure

The Site partners with various online tools, services, and products. Links on the Site may be affiliate links, and we may earn a commission on purchases made through these links. These links allow tracking of purchases at no additional cost to you. Our priority is to offer top-quality products, services and recommendations. For questions, please contact us.

Content on the Site and related materials such as Nostalgie World products is for creative, reflective, and educational purposes only. It does not constitute medical, psychological, or legal advice, and is not intended to diagnose, treat, cure, or prevent any condition. Any use of information from the Site and related materials is at your own discretion and risk, and is not designed to guarantee specific outcomes of any kind. If you are in distress or crisis, please seek support from qualified professionals or emergency services in your area.

For questions about this disclaimer, please contact info(at)nostalgie.world.

Automated Data & No Update Obligation

Automated Content; No Update Obligation. Parts of the Site and Services may be generated or assisted by automated systems. Content may contain errors or be incomplete. We do not warrant that any content is accurate, complete, or up to date, and we assume no obligation to update or correct content, although we may do so at our discretion.

4. Duration and termination

We reserve the right and you agree that we may, without notice or liability and in our sole discretion, terminate these Terms and suspend and/or terminate your access to or use of the Site at any time and for any reason; but in particular, if we suspect in our sole discretion that (i) you are violating or breaching any of these Terms of Service, (ii) you are violating or breaching any applicable law or regulation, (iii) you have engaged in fraudulent activity, and/or (iv) you have engaged in activity and/or transactions in violation of these Terms.

You agree that any suspension or termination of your use of or participation in the Site, or deletion of any content or information posted by you at any time, may be done without prior notice and that we will not be liable to you or any third party for any such suspension or expiry.

5. Limitation of liability – Disclaimer

Important Disclaimer. The “IMPORTANT DISCLAIMER” published on the Site is incorporated by reference into these Terms and forms part of the binding agreement between you and Saphire.

The Site, their Content and any features or items obtained through them are provided to you “AS IS” and “AS AVAILABLE”, without any warranty of any kind either expressed or implied. You expressly understand and agree that access to and use of the Site is at your own risk.

All information, content, and reports generated by the Site or the mobile app are provided for informational and educational purposes only and do not constitute medical, psychological, or legal advice.

For avoidance of doubt, any “Soft Reset plan” and/or Report is generated from your self-reported answers for reflection purposes only and is not clinical guidance.

SAPHIRE EXPRESSLY DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THE SITE AND ANY PART OF IT AND ANY EXTERNAL WEBSITES AND YOUR USE OF THE SITE, AND SAPHIRE MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO THE COMPLETENESS OF THE SITE, CORRECTNESS, TIMELINESS, MERCHANTABILITY, NON-INFRINGEMENT, SUITABILITY OF SUCH CONTENT FOR ANY USE, APPLICATION OR PURPOSE.

We and any person connected to us do not make any warranty or representation about the accuracy or completeness of the Site Content, pages, services, options and contents or the content of any third party websites linked to the Site or servers (“servers”) through which content is made available to users and we assume no responsibility or liability for (1) that your access to or use of the Site will meet your needs or expectations, (2) that your access or use of the Site will be uninterrupted, timely, secure or free of errors or omissions, that errors will be corrected or that all questions raised will be answered, (3) that usage data provided through the Site will be accurate; and/or (4) that the Site or any content, services or features available on or through the Site is free of viruses or other harmful components; ea or the like that may be transmitted to or through the Site by any third party.

You accept the inherent security risks of providing information and online transactions over the Internet and agree that we are not responsible for any breach of security.

Saphire under any circumstances, including the case of negligence, is not responsible for any form of damage suffered by the visitor/user of the pages, contents, services and options of the Site, which the user does on his own initiative and with the knowledge of these terms. The cost of any corrections or services is borne by the user and under no circumstances by Saphire.

You acknowledge and agree that we have made the Site available to you and have entered into these terms of service subject to the disclaimer of warranties and limitations of liability in this section. We could not provide the Site to you without these restrictions.

6. Changes

Changes to the Site

We may change, update, modify the Site from time to time, but the content may not necessarily be complete or up-to-date. Any material on the Site may be out of date at any time and we are under no obligation to update such material. You also have the right to stop using our Site or our Content at any time. By continuing to access or use the Site after any such changes to the Site or Content become effective, you will be deemed to have accepted and agreed to such updated Site and Content. We are not liable for any loss or damage relating to your inability to access or use our Site.

Changes to the Terms

These Terms and Conditions may be updated or modified from time to time and we reserve the right to modify these Terms of Service (including any Policies) at any time without notice and at our sole and absolute discretion. When we make changes, we will make the updated Terms available on the Saphire Site and update the “Last Updated” date at the beginning of these Terms accordingly. You should periodically check these Terms for changes. Any changes to these Terms will be effective on the date they are made, and your continued access to or use of the Site after the Terms of Service have been modified means that you accept and agree to the changes. We recommend that you consult the Terms of Service from time to time so that you are aware of any changes, as they are binding on you. If you do not wish to be bound by any changes or modifications to these Terms, then you should stop using the Site immediately.

7. Right to participate

  1. Participation in our Site is open only to persons who are fully capable and competent to satisfy these Terms. You may not allow other persons to use your user credentials and you agree that you are the only authorized user.
  2. Our Site is not directed at children. You must be at least 18 years of age to access the Site. If you are under 18 years of age, you may not use our website or any other domain, subdomain, services and features provided by Saphire for any reason. By accessing the Site, you represent and warrant that you are at least 18 years of age.

If you do not meet all of these requirements, you must not access or use the Site and its content. By accessing the Site and using “www.nostalgie.world”, and/or any other subdomains of the Site and it’s Content, you represent and warrant that you are of legal age and meet all the appropriate requirements to enter into a binding contract with Saphire.

8. SaaS platform access

Access and Eligibility. The Platform (and its mobile applications) at the Site is available to individual consumers and business users who are at least 18 years old. If you register or use the Platform on behalf of a company or organization, you represent and warrant that you have authority to bind that entity to these Terms. Payments, invoicing, taxes, and refunds (where applicable) are handled through the checkout provider presented to you at the point of purchase (currently, Lemon Squeezy acts as Merchant of Record for certain purchases).

Account Creation & Sign-In. Access to certain Services requires authentication (for example, via your Google account and/or email login, where available). By signing in, you authorize us to collect and store the information required to create and administer your account (such as your display name and email address, depending on the sign-in method you use). You are responsible for: (a) maintaining the confidentiality of your credentials; (b) all activity under your account; and (c) ensuring your account is used only by you (no credential sharing).

Account Data We Process. We process only the data needed to operate your account and verify purchase/access:

  1. Sign-in data (e.g., Google display name and email address, depending on the sign-in method you use);
  2. Purchase/access data from the checkout provider (e.g., transaction identifier and purchase status) to confirm access entitlement.

For details on purposes, legal bases, retention, transfers, and your rights, see our Privacy Policy.

Soft Reset Access Rules. Certain experiences (including the Soft Reset assessment and the personalized Report) are made available based on your account status and purchase status:

  1. Signed-out users cannot view the Report and will be redirected to sign in.
  2. Signed-in but unpaid users cannot view the Report and will be redirected to the paywall/checkout.
  3. Signed-in and paid users can access and view the Report.

We may verify purchase status and link it to your account to enforce these access rules.

9. Billing, Purchases, and taxes

One-Time Purchase. The current paid offering available through the onboarding flow is a one-time purchase that unlocks access to (i) your personalized Soft Reset Report and (ii) the related digital ebook “The Soft Reset” (together, the “Digital Products”). The current price is €14 plus applicable VAT (or other applicable taxes) as shown at checkout.

Checkout Provider. Purchases are processed by the checkout/payment provider presented to you at checkout (the “Checkout Provider”). The Checkout Provider may act as the contractual seller/merchant of record and may handle payment processing, invoicing/receipts, tax calculation and remittance (e.g., VAT), refunds, and chargebacks under its own policies and terms. Your payment contract may be with the Checkout Provider, while your use of the Services remains governed by these Terms between you and Saphire.

Lifetime Access. Where described as “lifetime access,” this means access for as long as we continue to make the relevant Digital Products available through the Services under your Account. Lifetime access is provided to the purchasing Account, is non-transferable, and may be suspended or terminated in accordance with these Terms (for example, for fraud, abuse, or breach).

We may introduce additional paid plans (including subscriptions) in the future. If we do, the applicable pricing, renewal terms, cancellation methods, and any required consumer disclosures will be presented to you prior to purchase and will apply only prospectively.

Your billing portal is available at billing.nostalgie.world/billing.

10. Cancellations and refunds

Refunds and right of withdrawal (digital content)
Refunds. Refund eligibility (if any) for the Digital Products is governed by the policy presented to you at checkout and/or in your purchase receipt from the Checkout Provider. To request a refund (where available), you must follow the instructions provided by the Checkout Provider or contact us at info(at)nostalgie.world and we will direct your request appropriately.

Statutory Consumer Rights (EU/EEA). If you are an individual consumer located in the EU or EEA, you may have statutory rights, including a 14-day right of withdrawal for certain purchases under applicable consumer protection laws. However, where digital content or digital services are supplied immediately, you may lose the right of withdrawal once performance begins, if you have expressly consented to immediate performance and acknowledged that you thereby lose your right of withdrawal (where such consent/acknowledgement is required).

Chargebacks. Unwarranted chargebacks may result in loss of access to the Digital Products and/or suspension of your Account, to the extent permitted by law.

11. Service scope, availability, and support

Scope of Service. The Platform provides a digital self-reflection experience (the “Services”). This may include, without limitation, access to:

  1. interactive onboarding questionnaires/assessments (including a short quiz organized into themed sections);
  2. generation of personalized outputs based on your answers (such as a “plan” and a consolidated Report);
  3. gated access features that require you to be signed in and/or to complete a purchase to unlock the full Report;
  4. avatar customization and progression (including XP, streaks, badges, and similar game-like elements); and
  5. account features (including sign-in, purchase-status verification, and basic account administration); and
  6. support and service communications related to your account or access.

The Services are intended for personal, non-clinical self-reflection practices only. They do not constitute medical, psychological, or therapeutic services and must not be used as a substitute for professional care.

Features and content available to you may vary based on your account status, purchase status, device, and app version.

Availability. We use commercially reasonable efforts to keep the Platform available at all times. However, the Platform may be unavailable due to scheduled maintenance, emergency downtime, infrastructure issues, third-party service interruptions or other causes. We do not guarantee uninterrupted or error-free operation, nor do we guarantee specific uptime or service-levels.

Support. Standard support is provided by email at info(at)nostalgie.world during normal business hours. Response times are typically within two (2) business days but are not guaranteed.

Changes to the Platform. We may add, modify, enhance, suspend or discontinue features, content, modules, or functionality at any time without prior notice. If we make a change that materially reduces functionality or access (for example removal of a core module), we will use commercially reasonable efforts to provide advance notice, but this is not guaranteed.

Beta or Preview Features. Any feature labeled “Beta”, “Preview”, or similar is provided as-is for evaluation only and may be changed or removed at any time.

12. Acceptable use, rate limits, and security

Fair Use. You may use the Platform only for your own personal or business purposes. You must not:

  1. interfere with security features or attempt to bypass rate limits or authentication.
  2. access or attempt to access data outside your plan;
  3. scrape, crawl, or bulk-download Service Data;
  4. resell, redistribute, or publish Service Data;
  5. use Service Data to train AI, ML, or LLM models without our prior written consent;

Automation and Rate Limits. Any automated access must respect posted rate limits. We may throttle, suspend, or terminate access for excessive or abusive use.

Security Obligations. You are responsible for maintaining the confidentiality of your credentials and must promptly notify us of any unauthorized access or suspected breach.

13. License, ownership, and feedback

License to You. Subject to these Terms and, where applicable, payment of all fees due, Saphire grants you a non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the Platform and view the Service Data solely for your personal use (or internal business purposes, if you are a business user). This license continues for as long as you are permitted to access the Services under these Terms (including any applicable lifetime access entitlement), unless earlier terminated or suspended in accordance with these Terms.

Restrictions. You may not:

  1. copy, modify, distribute, sublicense, rent, lease, transfer, publicly display, adapt, reverse engineer, decompile or otherwise attempt to derive the source code, algorithms, models or underlying logic of the Platform or Service Data (except as permitted by mandatory law);
  2. use the Platform or Service Data to provide services to third-parties, act as a service bureau, or use it for commercial resale;
  3. remove or obscure proprietary notices, marks or copyright legends contained in the Platform or Service Data; or
  4. use the Platform or Service Data in any way that violates applicable law or these Terms.

Ownership. All intellectual property rights, title and interest in and to the Platform, the Service Data, algorithms, models, user interface, dashboards, code, enhancements and any derivative works thereof remain exclusively with Saphire and its licensors. Your use of the Platform does not transfer to you any ownership in the foregoing.

Feedback. By providing any suggestions, comments or feedback (“Feedback”) regarding the Platform or Service Data, you hereby grant Saphire a perpetual, irrevocable, worldwide, royalty-free, fully-paid, transferable and sublicensable license to use, copy, reproduce, modify, adapt, publish, distribute and exploit such Feedback in any manner. You also waive any moral rights you may have in connection with such Feedback.

14. Protection of personal data and sub-processors

User privacy is important to Saphire and it makes every effort to comply with all laws applicable to the management of personal data and information. For this reason, it has developed a Privacy Policy and Cookie Policy that governs the manner in which data is collected, used, shared, transferred and retained, and is incorporated by reference into these Terms.

The personal data, which the user voluntarily provides through the Site, is used only for the purposes detailed in the Privacy Policy and is not transmitted to third parties, unless permitted or required by the purposes of the contract and the law. By voluntarily providing his data, the user provides his express consent to their processing, while maintaining his rights defined in the applicable Greek Legislation and in the General Data Protection Regulation (EU) 2016/679 (GDPR).

By using the Saphire’s Site you confirm that you have read and understood our Privacy Policy and that you understand and agree to how we collect, use, store, share, transfer and maintain your personal information between us and consent to all actions that we undertake regarding your information in compliance with the Privacy Policy.

Use of cookies

The Site uses “cookies” to allow you to log in to our services and to track your traffic patterns. Please read about the use of cookies in the Cookie Policy.

Data Collected and Purposes. We process only the data needed to deliver and operate our Site and Platform, including:

  1. Google Display Name and Email (used for authentication);
  2. Checkout Provider purchase identifiers and purchase status (to verify paid access to the Digital Products);
  3. Technical, usage, and analytics data (e.g., cookies, Google Analytics, Meta Pixel) for performance and security.

The lawful bases for processing are the performance of a contract, legitimate interests, legal obligation, or your consent, as explained in our Privacy Policy.

15. Indemnification

You agree to defend, indemnify and hold harmless Saphire including each of its licensors and service providers and any person affiliated with it from any claims, suits, demands, actions, losses, liabilities, damages, judgments, penalties, fines, expenses and other costs or fees (including reasonable attorneys’ fees) related to or arising out of (1) Your violation of these Terms of Service; (2) Violating any applicable laws, rules or regulations in connection with your access to or use of the Site; (3) Violation of third party rights, including but not limited to intellectual property rights. (4) Your misuse of the Site and any other activities related to the Site Content or Collection and/or (5) any overtly harmful action towards any other user of the Site with whom you have connected through the Site.

This indemnification is without regard to the negligence of any party, including any indemnified person.

16. Applicable Law and Other Terms

The above terms and conditions of use of the Saphire Site, as well as any modification or change thereof, are governed by national, European and international law.

If any part or provision of these Terms is found to be contrary to the above legal framework or becomes invalid, it automatically ceases to be valid and is removed from this, without in any way affecting the validity of the other terms.

This constitutes the entire agreement between Saphire and the visitor/user of its pages and services and only binds them. No modification of these terms shall be considered or made a part of this agreement unless made in writing and incorporated into these terms of service.

Our failure or delay to exercise or enforce any right or provision of these Terms shall not constitute or be deemed a waiver of any future exercise or enforcement of such right or provision.

It is hereby expressly agreed that any disputes arising from the application of these terms and the general use of the Saphire’s Site by their visitor/user, if not resolved amicably, shall be governed by Greek law and subject to the jurisdiction of the Courts of Thessaloniki.

The following are incorporated into these Terms: our Disclosures & Disclaimer Agreement, Privacy Policy, Cookie Policy, and the Important Disclaimer published on the Sites.

17. Contact us

If you have any questions or comments, please feel free to contact us by email at: info(at)nostalgie.world.