Terms of Service

1. Publisher and scope

Lukas Gerken
Sonnenbergstrass 9B, 8610 Uster, Switzerland
Support and privacy: tennisfeel.com@gmail.com
Account deletion: tennisfeel.deleteacc@gmail.com

These terms govern TennisFeel’s website, app-related services and Stringer Pro features offered by Lukas Gerken, an individual publisher in Switzerland. “You” means the person using the service; “I” and “TennisFeel” refer to the publisher. They apply when presented and accepted as part of the relevant service agreement. Publication alone does not retroactively create acceptance by an existing user.

These service terms supplement applicable Apple App Store or Google Play terms. For the iOS app, Apple’s Standard End User License Agreement governs the app licence unless a valid custom licence is supplied through the store. These website terms are not a replacement custom Apple EULA. Mandatory consumer rights take priority.

2. Eligibility and accounts

You must be 16 or older to create or use a TennisFeel account and answer the eligibility question truthfully. If you are not legally able to enter the agreement or make a purchase independently where you live, obtain the required parent or guardian authorization. A store purchase does not waive the minimum account age.

Keep account details accurate, protect your sign-in credentials and notify support of suspected unauthorized access. Do not impersonate someone else, share credentials to evade access restrictions or transfer paid access without permission. You remain responsible for use you authorize, but these terms do not make you automatically liable for every unauthorized action.

3. What TennisFeel provides

TennisFeel helps record and compare rackets, strings, setups, measurements and playing feedback. Available features may include string-frequency measurement, simulations, recommendations, direct messaging, equipment sharing and professional client/job tools. Availability varies by platform, version, region and purchased offer. Descriptions at purchase determine what is included.

Measurements, scores and estimates depend on input quality, equipment, technique and model assumptions. They are not guarantees of performance, exact laboratory measurements or manufacturer-certified specifications. Check important results against appropriate equipment and manufacturer guidance.

TennisFeel does not diagnose, treat or prevent injury. Comfort guidance is equipment information, not medical advice. Do not use an estimate to disregard symptoms or professional advice. Do not use the app in a way that distracts you during play or creates a physical risk.

4. Purchases, subscriptions and trials

App and Pro purchases, where available, are processed by Apple or Google. The store’s purchase screen states the price, currency, taxes where applicable, billing period and any trial or introductory conditions before confirmation. These terms do not create a particular price, trial or recurring charge.

A one-time Pro purchase grants the access described in that offer without a recurring subscription fee. A subscription renews under the store’s disclosed conditions until cancelled. Cancel in the store account settings before the applicable renewal deadline. Access ordinarily continues through the paid period, subject to refunds, revocation and lawful suspension. Trial conversion and cancellation conditions must be disclosed in the actual offer; no 20-day trial is promised by these terms.

Purchases are linked to the TennisFeel account used at purchase and verified with the relevant store. Restore using the same TennisFeel and store accounts. Access is not automatically transferred between different accounts or stores, and Family Sharing is not currently offered by this integration. Contact support about a lost account or failed restoration before buying again.

Verification requires an internet connection. In the current implementation, cached Pro authorization lasts at most one hour after verification and may expire sooner with the purchase. Offline verification failure can temporarily prevent Pro use; it does not itself erase saved records. Basic access and data-rights requests do not require a current Pro subscription.

Refunds, withdrawal rights and remedies follow applicable law and the store’s procedures. Nothing here excludes a statutory refund, warranty or other mandatory right. Uninstalling the app or deleting a TennisFeel account does not automatically cancel a subscription or trigger a refund. Account deletion remains available without first cancelling.

5. Stringer Pro and professional client records

Stringer Pro is a software workspace. Paid access does not certify a stringer’s qualifications, verify workmanship or imply TennisFeel endorses that person. A stringer remains responsible for their services, equipment decisions, customer communications and business records.

A stringing service arranged with another user is an agreement between those parties. TennisFeel’s app purchase is separate from any payment for physical stringing services. The stringer must clearly explain their own prices, service conditions and remedies.

Record and share client information only when entitled to do so. Provide clients with the required privacy information, respect deletion/access requests and use appropriate authority when handling younger clients. Do not upload unnecessary medical records or sensitive details. Any processing agreement legally required for hosting professional client data must be addressed separately; these public terms do not replace it.

6. Messaging and acceptable use

Direct messaging is for appropriate communication between users, including players and stringers. Accept the messaging rules when prompted. Acceptance normally applies once per account and rule version; material rule changes may require renewed acceptance.

Do not use TennisFeel to:

• harass, threaten, bully, discriminate against, exploit or impersonate another person;
• send sexual exploitation material, illegal content, scams, spam or unwanted sexual messages;
• share another person’s private information or copyrighted material without permission or another lawful basis;
• upload malware, attempt unauthorized access, evade blocks, scrape personal information or interfere with the service;
• misrepresent purchase rights, circumvent paid access or use another person’s account without authorization.

Report a message or block a participant using the available app controls, or contact support. Include enough information to investigate, but do not send unnecessary sensitive data. I personally review reports and may remove content, restrict messaging or suspend an account as proportionate to the issue. Monitoring is not continuous, and immediate intervention is not guaranteed. Contact local emergency services for an immediate danger.

You may ask support to review a moderation decision. Where lawful and practical, I will explain the reason and provide a chance to respond. Urgent safety, security or legal issues may require action without advance notice.

7. Your content and shared copies

You retain rights in the information and content you contribute. You give TennisFeel a limited, non-exclusive permission to host, store, process, display and transmit it only as needed to provide requested features, maintain security and meet legal duties. This is not permission to sell your content or use it for unrelated advertising.

You are responsible for having the rights and authority needed to contribute or share content. Recipients can retain shared information; importing equipment or a job creates a separate copy. Deleting the original does not automatically remove independently imported copies. Privacy rights and lawful deletion requests still apply.

Messages are not end-to-end encrypted. Avoid sending passwords, full payment details or unnecessary sensitive information. The Privacy Policy explains service access, sharing, retention and deletion.

8. Beta testing

Beta features may change, contain errors or become unavailable. Store test purchases follow the testing programme’s rules and do not promise permanent paid-release access. Keep an appropriate independent copy of records you rely on professionally. Any limitations of beta testing remain subject to mandatory rights.

9. Availability, updates and external services

The service depends on internet access and providers including Apple, Google and Firebase. Maintenance, outages, security measures and device compatibility can affect availability. Reasonable efforts will be made to resolve issues, but uninterrupted or error-free operation is not guaranteed.

I may make necessary updates for security, legal compliance and service operation. Material changes affecting paid access will receive appropriate notice and any cancellation, refund or other remedy required by law. These terms do not reserve an unrestricted right to remove paid features without a remedy.

External services and links are governed by their own terms. TennisFeel’s names, software, design and original materials are protected by applicable intellectual-property law. You may use the service for its intended purposes and retain rights that cannot lawfully be restricted, including applicable interoperability and research exceptions.

10. Ending use, suspension and deletion

You can stop using the service and request account deletion through the deletion page, the available in-app control, or tennisfeel.deleteacc@gmail.com. Ownership checks may be needed. The privacy notice explains scope, independent copies and justified retention exceptions.

I may restrict access where reasonably necessary to address a serious breach of these terms, fraud, security risks, safety concerns, a valid legal requirement or an invalid purchase entitlement. Action should be proportionate. You may contact support for an explanation or review, subject to lawful confidentiality restrictions.

Where the service is discontinued or a material part of a paid agreement cannot be provided, applicable notice and consumer remedies remain available. Expiry or suspension does not cancel your privacy rights. Account deletion and store-subscription cancellation are separate actions.

11. Responsibility and consumer protections

You remain responsible for checking equipment decisions and for professional services you provide. Estimates can be inaccurate, and important business records should not depend on a single copy. These statements do not remove TennisFeel’s responsibility for its own contractual or legal obligations.

Nothing in these terms excludes or limits liability that cannot legally be excluded, including applicable liability for intentional misconduct, gross negligence, personal injury, fraud or mandatory consumer guarantees. Any otherwise permitted limitation is subject to the law that applies to you; these terms impose no blanket “no refunds” rule or automatic forfeiture of your rights.

Contact support if the service does not work as described. Available remedies may include correction, restoration, a price reduction, cancellation or refund, depending on the facts, applicable law and the store process.

12. Applicable law, changes and contact

Swiss law governs these service terms to the extent permitted by law. If you are a consumer, this does not deprive you of mandatory protections or rights to bring proceedings in courts available under the law of your residence. No mandatory arbitration, exclusive Swiss forum or waiver of statutory collective remedies is imposed here.

This version is dated 10 November 2026 and applies when published and, where required, accepted. Material changes will be communicated appropriately before taking effect, except where a legal or urgent security requirement requires a different timetable. Changes do not retrospectively alter completed purchases or override mandatory rights. Continued use alone is not relied on where express agreement is legally required.

If a provision cannot be enforced, the remaining provisions continue to the extent lawful. Questions, complaints, purchase issues or moderation appeals can be sent to:

Lukas Gerken
Sonnenbergstrass 9B, 8610 Uster, Switzerland
Support and privacy: tennisfeel.com@gmail.com
Account deletion: tennisfeel.deleteacc@gmail.com