NoSheet Terms of Service

Last Updated: 2026-04-25

These Terms form an agreement between you and Nicholas Fest, sole proprietor, based in Germany ("NoSheet," "we," "us") governing your use of the NoSheet iOS app and related services (the "App"). By downloading, installing, or using the App, you agree to these Terms. If you do not agree, do not use the App.

1. What NoSheet Is

NoSheet is an ear-training and music-education iOS app. It provides interactive exercises across multiple instruments, real-time audio feedback, and an AI-powered coach that helps plan practice sessions and explain musical concepts. NoSheet is designed for users with some musical background; it may not be suitable for absolute beginners.

2. Eligibility

You must be at least 13 years old to use the App. If you are under the age of majority where you live, you may only use the App with the involvement of a parent or legal guardian, and any subscription purchase must be made or authorized by that parent or guardian. By using the App, you represent that you meet these requirements and are legally able to enter into this agreement.

3. Your Account

3.1 Account creation

The App creates an account for you automatically on first launch. You are not required to provide an email, name, or social login. The account is tied to a pseudonymous, device-generated identifier stored in your Keychain.

3.2 Device-bound progress

Because the account is device-bound, if you delete and reinstall the App, or switch devices, you may not be able to recover your progress. We do not currently offer account recovery.

3.3 Account deletion

You may request deletion of your account and all associated data by emailing nick@nosheet.app. The "Send Feedback" feature in the App automatically includes your account ID in the body of the email it composes, so the easiest way to share your ID with us is to reply to, or quote, any prior feedback email you've sent. If you've never used Send Feedback, include the approximate date you first installed the App and your device model so we can locate your record.

4. Subscriptions and Purchases

4.1 Subscription plans

NoSheet offers subscription-based access to premium features. Current plans are a monthly subscription and an annual subscription. Pricing is shown in the App before you confirm purchase and may vary by region.

4.2 Billing

Subscriptions are billed through your Apple ID at confirmation of purchase and at the start of each renewal period. Apple processes all payments; NoSheet does not receive your payment details.

4.3 Auto-renewal

Subscriptions automatically renew unless you cancel at least 24 hours before the end of the current period. Your Apple ID will be charged for renewal within 24 hours of the end of the period.

4.4 Cancellation

You can manage or cancel a subscription any time in iOS Settings → [your name] → Subscriptions. Cancellation takes effect at the end of the current paid period; we do not provide prorated refunds.

4.5 Refunds

Refund requests are handled by Apple under Apple's policies. Contact Apple Support for refund requests.

4.6 Free trials and promotional offers

We may offer free trials or promotional pricing. If you do not cancel before the trial ends, you will be charged the then-current subscription price.

4.7 Changes to pricing

We may change subscription prices or terms. We will notify you in advance via in-app notice. Price changes take effect no sooner than 14 days after notice, will not apply retroactively to an in-progress paid period, and you may cancel before they take effect.

4.8 EU consumer right of withdrawal

If you are a consumer in the European Union, you generally have a 14-day right of withdrawal for digital subscriptions under EU Directive 2011/83/EU. Because subscription benefits begin immediately upon purchase, by completing your purchase you expressly consent to immediate performance of the contract and acknowledge that, once we have begun providing the digital service, you lose your right of withdrawal under Art. 16(m) of the Directive. You can still cancel the subscription at any time as described in § 4.4; cancellation ends auto-renewal but does not entitle you to a refund of the current paid period.

5. AI Coach Features

5.1 What it is

The App includes AI-assisted features that generate practice plans, explanations, and chat responses using Google's Gemini models via Firebase AI Logic.

5.2 AI content is generated and may be wrong

Responses from the AI coach are produced algorithmically. They may be inaccurate, incomplete, outdated, or inconsistent. Do not rely on AI responses as professional musical, medical, legal, or other advice. Always use your own judgment.

5.3 Your inputs

Do not submit into the AI chat: personal information about yourself or others; credentials, financial data, or health information; copyrighted material you do not have the right to share; or anything confidential. You are responsible for your inputs.

5.4 Rights in your inputs and outputs

You retain any rights you have in what you type into the AI coach. You grant us a non-exclusive, worldwide, royalty-free license to store and process your inputs and the resulting outputs as needed to operate the App, support you, and debug issues. We do not use your inputs to train third-party AI models; see the Privacy Policy § 7 for details.

As between you and NoSheet, you may use the AI responses generated for you for any lawful personal purpose. Generative AI outputs may, however, be similar or identical to outputs generated for other users, and we make no representation that any particular output is unique to you or free from third-party rights.

5.5 No warranty of AI availability

AI features may be rate-limited, modified, suspended, or discontinued without notice, including for budget or third-party service reasons.

6. Microphone and Audio

The App uses your device microphone to detect what you play or sing during exercises. Audio is processed on your device in real time and is not recorded or transmitted by us. You can revoke microphone permission in iOS Settings at any time, but doing so will disable ear-training functionality.

7. Acceptable Use

You agree not to:

  1. Attempt to access the App or our backend by any means other than the interface we provide.
  2. Reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code of the App, except to the minimum extent permitted by applicable law.
  3. Use the App to violate any law or regulation.
  4. Interfere with or disrupt the App, its servers, or the experience of other users.
  5. Upload or transmit viruses, malware, or other harmful code.
  6. Submit automated, abusive, or excessive AI requests with the intent to exhaust rate limits or inflate our costs.
  7. Circumvent App Check, App Attest, or other integrity mechanisms.
  8. Resell, sublicense, or commercially exploit the App or any content obtained through it.
  9. Use the App to harass, defame, or harm others.

8. Intellectual Property

8.1 Our content

The App, including its source code, audio samples, soundfont, graphics, UI, exercises, curriculum, and AI system prompts, is owned by NoSheet or its licensors and is protected by copyright, trademark, and other IP laws.

8.2 Your limited license

We grant you a personal, non-exclusive, non-transferable, non-sublicensable, revocable license to install and use the App on Apple devices you own or control, for personal, non-commercial use, and only while you comply with these Terms.

8.3 Feedback

If you send us feedback, suggestions, or bug reports, you grant us a perpetual, irrevocable, worldwide, royalty-free license to use that feedback without obligation to you.

9. Third-Party Services

The App integrates third-party services, including Apple, Google Firebase (Crashlytics, Remote Config, App Check, AI Logic / Vertex AI, Anonymous Auth), Supabase, PostHog, RevenueCat, and — if you accept App Tracking Transparency — TikTok for Business and Meta (Facebook). Your use of those services may be subject to their own terms. See our Privacy Policy for details.

10. Disclaimers

THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE," WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND UNINTERRUPTED OR ERROR-FREE OPERATION. WE DO NOT WARRANT THAT THE APP WILL MEET YOUR REQUIREMENTS, THAT AI OUTPUTS WILL BE ACCURATE, OR THAT YOU WILL ACHIEVE ANY PARTICULAR MUSICAL SKILL OUTCOME.

Some jurisdictions do not allow exclusion of implied warranties, so some of the above may not apply to you. In that case, such warranties are limited to the minimum extent permitted by law. Nothing in these Terms limits your statutory consumer rights under German or EU law.

11. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, NOSHEET AND ITS AFFILIATES WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, LOST DATA, OR LOST GOODWILL, ARISING OUT OF OR RELATING TO THE APP OR THESE TERMS, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

OUR AGGREGATE LIABILITY FOR ANY CLAIM ARISING OUT OF OR RELATING TO THE APP OR THESE TERMS IS LIMITED TO THE GREATER OF (A) THE AMOUNT YOU PAID US IN THE 12 MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM OR (B) €50.

For users to whom German law applies: where we breach an essential contractual obligation (a "Kardinalpflicht" — an obligation whose fulfillment is essential to the proper performance of the contract and on which you may regularly rely), our liability for ordinary negligence is limited to foreseeable damages typical for this type of contract, but is not excluded.

These limitations do not apply to liability that cannot be limited or excluded under applicable law — for example, liability for intent, gross negligence, injury to life, body or health, fraudulent concealment of defects, breach of an express guarantee, or under the German Product Liability Act (Produkthaftungsgesetz).

12. Indemnification (non-consumers only)

If you are using the App other than as a consumer (for example, as a business or in a professional capacity), and to the extent permitted by law, you agree to indemnify and hold NoSheet harmless from claims, losses, and costs (including reasonable attorneys' fees) arising from (a) your violation of these Terms, (b) your violation of any law or third-party right, or (c) your misuse of the AI features, including submitting content you did not have the right to submit.

This § 12 does not apply to consumers within the meaning of § 13 BGB or equivalent local law.

13. Termination

We may suspend or terminate your access to the App at any time if you violate these Terms or if we discontinue the App. You may stop using the App at any time by uninstalling it. Sections that by their nature should survive termination (including IP, disclaimers, liability limits, indemnification, and governing law) will survive.

14. Changes to These Terms

We may update these Terms. Material changes will be announced via in-app notice at least 14 days before taking effect. Continued use of the App after the effective date constitutes acceptance of the updated Terms. If you do not agree, stop using the App before the effective date.

15. Governing Law and Disputes

These Terms are governed by the laws of the Federal Republic of Germany, excluding its conflict-of-laws rules and the UN Convention on Contracts for the International Sale of Goods. Exclusive jurisdiction for disputes lies with the courts of Munich, Germany, except where mandatory consumer-protection laws require otherwise. Consumers retain the right to bring claims in the courts of their place of residence where EU law requires.

The European Commission's online dispute resolution platform is available at https://ec.europa.eu/consumers/odr/. We are not obliged, and generally do not participate, in dispute resolution before a consumer arbitration board.

16. Apple App Store Terms

You acknowledge:

  1. These Terms are between you and NoSheet, not between you and Apple. Apple is not responsible for the App or its content.
  2. Your license to use the App is limited to a non-transferable license to use the App on Apple-branded products you own or control, per the Usage Rules in Apple's Media Services Terms.
  3. Apple has no obligation to provide maintenance or support for the App.
  4. If the App fails to conform to any applicable warranty, you may notify Apple and Apple will refund the purchase price (if any). Apple has no other warranty obligation.
  5. NoSheet (not Apple) is responsible for addressing any claims relating to the App, including product liability, consumer protection, or intellectual property claims.
  6. NoSheet is responsible for investigating third-party intellectual-property claims against the App.
  7. You represent you are not located in a country subject to a U.S. Government embargo or designated a "terrorist supporting" country, and you are not on any U.S. restricted-party list.
  8. Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.

17. Entire Agreement; Severability

These Terms and our Privacy Policy are the entire agreement between you and NoSheet regarding the App and supersede any prior agreements. If any provision is held unenforceable, the remaining provisions remain in effect.

18. Contact

Email: nick@nosheet.app Postal address: Nicholas Fest, Ginhardtstraße 40, 80639 München, Germany