Vayter Terms of Use

Effective date: August 22, 2026
Last updated: August 22, 2026

These Terms of Use ("Terms") govern your access to and use of Vayter, including the Vayter mobile application, related coach dashboard functionality made available to you, and related services (collectively, the "Service").

The Service is operated by Asher Epstein, Israel ("Vayter", "we", "us", or "our").

By accessing or using Vayter, you agree to these Terms. If you do not agree, do not use the Service.

These Terms should be read together with the Vayter Privacy Policy.

1. What Vayter is

Vayter is a fitness and personal-training tool used to support a human coaching relationship.

Vayter may allow you to:

• View training programs assigned by a human coach
• Record workouts, exercises, sets, repetitions, and weights
• Track personal records and workout history
• Record and view body-weight history
• Add training notes
• Use workout-related features such as rest timers and streaks
• Review progress with your coach

Vayter does not currently provide in-app purchases or accept payment inside the application.

Access to Vayter may be included as part of a separate coaching or personal-training service. Any fees, cancellations, refunds, scheduling terms, or other commercial conditions for that coaching service may be governed by a separate agreement or arrangement between you and the coaching provider, subject to applicable consumer law.

2. Invitation-only access

Vayter is currently invitation-only.

A coach must create or authorize an invitation before a new trainee can create a usable Vayter identity.

You may not:

• Attempt to create an account for an email address you do not control
• Use another person's account
• Circumvent the invitation process
• Attempt to obtain access to another trainee's or coach's information
• Share a one-time authentication code with an unauthorized person

We may refuse or block unauthorized account-creation attempts.

3. Your account and authentication

Vayter uses passwordless authentication. You sign in using a one-time code sent to the email address associated with your account.

You are responsible for:

• Maintaining access to and security of your email account
• Keeping one-time authentication codes confidential
• Providing accurate information
• Promptly informing us if you believe your account or email has been compromised

You must not transfer or sell access to your Vayter account.

If you lose access to the email address associated with your account, contact support@vayter.app.

4. Eligibility and minors

Vayter is not directed to children under 13.

If you are under the age at which you can legally agree to these Terms in the country where you live, you may use Vayter only with the consent or authorization of a parent or legal guardian where required by applicable law.

If applicable law requires parental or guardian consent for the collection or processing of your personal information, that authorization must also be obtained before you use Vayter.

A coach should not invite a minor unless the intended use is lawful and any required parent or guardian authorization has been obtained.

We may restrict or terminate access where we reasonably believe an account is being used in violation of applicable age or consent requirements.

5. Beta and pre-release service

Vayter may be provided as a beta, pilot, test, preview, or other pre-release service.

You understand that beta software may:

• Contain bugs or incomplete features
• Change without notice
• Experience downtime or synchronization issues
• Display incomplete or inaccurate information
• Lose locally stored or recently entered information in the event of a technical failure
• Be discontinued, reset, or materially changed before a public release

You should not rely on Vayter as the sole record of information that is critical to your health, safety, business, or legal obligations.

We will use reasonable efforts to operate the Service responsibly, but participation in a beta does not guarantee uninterrupted availability or that every feature will function as expected.

Nothing in this section excludes rights or remedies that cannot lawfully be excluded.

6. Fitness, health, and medical disclaimer

Vayter is a fitness and personal-training tool. It is not a medical device.

Vayter does not provide medical advice and is not intended to diagnose, treat, cure, prevent, monitor, or manage any disease, injury, medical condition, or health condition.

Information displayed in Vayter, including workout programs, training history, body-weight information, personal records, exercise demonstrations, or suggestions based on prior workouts, is provided for fitness and coaching purposes only.

Training programs made available through Vayter are created or assigned by a human coach. They are not a substitute for individualized medical advice, diagnosis, or treatment from a qualified healthcare professional.

Before beginning or materially changing an exercise program, and whenever you have a medical condition, injury, symptoms, pregnancy, medication concern, or other reason to question whether exercise is appropriate for you, you should consult a qualified healthcare professional.

Seek professional medical advice regarding medical questions, diagnosis, or treatment.

Do not use Vayter for a medical emergency. If you believe you are experiencing a medical emergency, contact the appropriate emergency service in your location.

7. Exercise risk and your responsibility

Physical exercise involves inherent risks, including fatigue, falls, strains, injury, aggravation of an existing condition, and in rare cases serious harm.

You are responsible for exercising within your abilities and for making reasonable decisions about your own safety.

You agree to:

• Stop or modify exercise if you experience unusual pain, dizziness, faintness, severe shortness of breath, chest pain, or another concerning symptom
• Use appropriate technique, equipment, and surroundings
• Follow applicable safety instructions
• Tell your coach about relevant limitations or concerns where appropriate
• Seek professional medical advice when appropriate

The presence of a workout in Vayter does not guarantee that the workout is safe or appropriate for every person or every circumstance.

8. The role of your human coach

Vayter is a tool that supports coaching. It does not replace the judgment or responsibility of a human coach.

Your coach may:

• Create or manage your trainee profile
• Assign workouts and programs
• Review your recorded training and body-weight history
• Review notes you enter in connection with training
• Use your training information to provide coaching

Depending on your coaching arrangement, the coach may be Asher Epstein or another coach authorized to use the Service.

You are responsible for communicating directly with your coach about injuries, medical issues, scheduling, technique, or other matters that cannot reasonably be resolved through an app.

9. No guarantee of results

Exercise outcomes differ between individuals.

We do not guarantee:

• Weight loss or weight gain
• Muscle gain
• Strength gains
• Athletic performance
• Body-composition changes
• Injury prevention
• Improvement in any medical condition
• Any particular fitness or coaching result

Any examples, progress displays, records, streaks, or historical information are not promises of future results.

10. Information you provide

You agree to provide information that is accurate to the best of your knowledge when accuracy matters to the Service or your coaching.

You are responsible for information and content that you submit, including workout entries and notes.

Do not submit content that:

• Violates another person's privacy or intellectual-property rights
• Is unlawful, fraudulent, threatening, abusive, or harmful
• Contains malicious code
• Attempts to compromise the Service or another user's account
• You are not authorized to provide

11. User content

As between you and Vayter, you retain ownership of the original content you submit to Vayter, such as trainee-authored notes and profile text, subject to any rights held by third parties.

You grant Vayter a limited, non-exclusive, worldwide license to host, store, reproduce, process, display, and transmit that content only as reasonably necessary to:

• Operate the Service
• Make the content available to you and your authorized coach
• Provide support
• Secure and maintain the Service
• Comply with law

This license ends when the content is deleted from the active Service, except to the limited extent information remains in lawful backups, logs, or records that we are permitted or required to retain.

12. Coach-authored programs and Vayter materials

Vayter, its software, design, branding, interfaces, documentation, exercise library materials, and other materials provided by us are protected by applicable intellectual-property laws.

Training programs, instructions, notes, videos, or other materials authored by a coach may be owned by Vayter, Asher Epstein, the relevant coach, or another rights holder, depending on who created them.

Unless we or the applicable rights holder gives you permission, your access is for your own personal use as part of the Service.

You may not:

• Copy or redistribute substantial parts of the Service
• Sell or sublicense Vayter content
• Remove copyright, trademark, or ownership notices
• Reverse engineer the Service except where applicable law expressly permits it
• Use Vayter materials to build a competing service in violation of applicable law or another enforceable agreement

13. License to use the app

Subject to these Terms, we grant you a limited, revocable, non-exclusive, non-transferable, non-sublicensable license to install and use the Vayter application for your personal use in connection with the Service.

No ownership interest in Vayter software is transferred to you.

If you obtain Vayter through an app store, your use may also be subject to that app store's applicable terms, including any standard end-user license terms that apply to the download.

14. Acceptable use

You must not:

• Access or attempt to access information you are not authorized to view
• Probe, scan, or test the vulnerability of the Service without written permission
• Bypass authentication, account, rate-limit, or security controls
• Use automated tools to scrape the Service
• Interfere with the normal operation of Vayter
• Upload malware or malicious code
• Impersonate another person
• Use Vayter for unlawful purposes
• Abuse support, invitation, authentication, or deletion mechanisms

We may investigate suspected misuse and may suspend or terminate access where reasonably necessary to protect users or the Service.

15. Third-party services

Vayter may use or integrate third-party services, including infrastructure providers, email delivery providers, app stores, and YouTube.

Third-party services may have their own terms and privacy policies.

We are not responsible for third-party content, availability, or independent practices that are outside our reasonable control.

When you choose to open an exercise video, your device may connect directly to YouTube/Google. Use of YouTube content is also subject to applicable Google/YouTube terms.

16. Offline use and local workout data

Some Vayter functions are designed to work temporarily without a network connection.

An unfinished workout may be stored locally on your device.

If you sign out while an unfinished workout exists, Vayter will warn you that signing out will discard that local workout. If you confirm sign-out, the unfinished workout will be deleted from that device.

You are responsible for reviewing important workout entries and confirming that they have been saved as expected before deleting the app, resetting the device, or signing out.

17. Service changes and availability

We may add, remove, modify, or discontinue features.

We may also perform maintenance, respond to security issues, or temporarily restrict the Service.

We do not promise that Vayter will always be available, that every feature will remain available, or that the Service will be compatible with every device or operating-system version.

Where applicable law requires advance notice of a material change, we will provide it.

18. Account suspension and termination

You may stop using Vayter at any time.

We may suspend or terminate access where reasonably necessary because of:

• A material violation of these Terms
• Fraud, abuse, or unauthorized access
• A security risk
• A legal requirement
• Termination or expiration of the coaching relationship through which access was provided
• Discontinuation of the Service

Where reasonably possible and legally appropriate, we may provide notice before termination.

Termination does not affect provisions that by their nature should survive, including intellectual-property provisions, accrued rights, disclaimers, and limitations of liability.

19. Account deletion

You may delete your Vayter account through:

Profile > Settings > Delete account

Account deletion is intended to be immediate and irreversible with respect to the active Vayter trainee account.

Deleting your account removes associated trainee data from the active Vayter database and clears user-specific local data after server deletion succeeds, subject to the limited exceptions described in the Privacy Policy for service-provider logs, backups, legal obligations, and technical safeguards.

You can also request account deletion through the public deletion page or by contacting support@vayter.app.

20. Privacy

Our collection and use of personal information are described in the Vayter Privacy Policy.

By using Vayter, you acknowledge that personal information must be processed to provide the Service.

Where applicable law requires a separate form of consent, including explicit consent for certain health-related information, that consent will be requested separately and will not be treated as given merely because you accepted these Terms.

21. Feedback

If you provide feedback, ideas, bug reports, or suggestions about Vayter, you give us permission to use that feedback without restriction or payment to improve or develop the Service, provided that this does not give us ownership of your underlying personal information or user content.

22. Disclaimer of warranties

To the maximum extent permitted by applicable law, Vayter is provided on an "as is" and "as available" basis.

We do not warrant that:

• The Service will be uninterrupted or error-free
• Every calculation, display, synchronization, or record will always be accurate
• The Service will meet every individual requirement
• All defects will be corrected immediately
• The Service will produce any particular fitness result

Nothing in these Terms excludes any warranty, guarantee, or consumer right that applicable law does not permit us to exclude.

23. Limitation of liability

To the maximum extent permitted by applicable law, Asher Epstein and Vayter will not be liable for indirect, incidental, special, exemplary, punitive, or consequential loss arising from or related to your use of the Service, including loss of data, loss of opportunity, or loss resulting from service interruption.

We are not responsible for harm caused by:

• Information you enter incorrectly
• Your failure to follow appropriate safety or medical advice
• Misuse of the Service
• Third-party services outside our reasonable control
• Device failure, loss, or unauthorized access that is not caused by our breach of an applicable legal duty

Nothing in these Terms excludes or limits liability that cannot lawfully be excluded or limited, including liability for fraud, willful misconduct, or personal injury where applicable law prohibits such exclusion.

Your statutory consumer rights remain unaffected.

24. Indemnity

To the extent permitted by applicable law, if you use Vayter for unlawful purposes or materially violate these Terms and that conduct causes a third-party claim against us, you agree to be responsible for the reasonable losses and costs directly resulting from that conduct.

This section does not require a consumer to indemnify us where doing so would be prohibited or unfair under applicable law.

25. Governing law and disputes

These Terms are governed by the laws of the State of Israel, without regard to conflict-of-law principles.

Subject to any mandatory rights you have under the law of the country where you live, disputes that are not resolved informally will be submitted to the competent courts in Israel.

If you are a consumer and applicable law gives you mandatory rights to bring a claim in your home jurisdiction, or provides protections that cannot be waived by contract, those rights are not affected by this section.

Before bringing a formal claim, we encourage you to contact us at support@vayter.app so we can try to resolve the issue.

26. App-store terms

If you download Vayter through Apple App Store or Google Play, the applicable store provider is not responsible for Vayter's operation, coaching service, support, or content except to the extent required by that provider's own terms or applicable law.

Your use of the application may also be subject to the app store's terms and any standard license terms that apply to applications downloaded through that store.

Where required by applicable app-store terms, the store provider may be a third-party beneficiary of provisions relating to your license to use the application.

27. Changes to these Terms

We may update these Terms as Vayter evolves.

If a change materially affects your rights or obligations, we will provide notice where required by applicable law.

The "Last updated" date at the top of these Terms shows when they were most recently revised.

Continued use after an updated version takes effect constitutes acceptance only to the extent permitted by applicable law. Where affirmative acceptance is legally required, we will request it.

28. Severability

If a provision of these Terms is found unenforceable, the remaining provisions will remain in effect to the maximum extent permitted by law.

The unenforceable provision will be interpreted or limited only as much as necessary to make it enforceable where permitted.

29. No waiver

If we do not enforce a provision immediately, that does not waive our right to enforce it later.

30. Entire agreement

These Terms, together with the Vayter Privacy Policy and any separate written terms that specifically govern your coaching service, constitute the applicable agreement concerning your use of Vayter.

If separate coaching terms conflict with these Terms on a matter specifically relating to coaching fees, scheduling, cancellation, or the coaching relationship, the separate coaching terms may control that matter to the extent permitted by law.

31. Contact

Questions about these Terms may be sent to:

Asher Epstein
Israel
support@vayter.app