Terms of Service

Last updated: April 14, 2026

1. Introduction

These Terms of Service ("Terms") govern your access to and use of the AI Music Song Generator: Musly mobile application ("App") provided by NOTJUST.DEV, SL ("Company", "we", "us", or "our"), a company registered in C/ Balmes 129bis 4º 2ª, 08008 Barcelona, Spain.

By downloading, installing, accessing, or using the App, you agree to be bound by these Terms. If you do not agree to these Terms, do not use the App.

2. Description of the Service

The App provides AI-powered music generation. You can describe a song idea through text or voice, select a genre and mood, and the App uses third-party AI providers to generate an original audio track. Features include:

  • AI song generation from text or voice prompts
  • Genre and mood selection
  • A personal music library to store your generated songs
  • Sharing generated songs as videos
  • Free tier with a limited number of generations
  • Premium subscription for unlimited generations

The App is for entertainment and creative purposes only.

3. Age Requirements

  • You must be at least 13 years old to use the App (as required by COPPA).
  • If you are located in the EU/EEA, you must be at least 16 years old to use the App without parental consent (as required by GDPR Article 8).
  • If you are under the applicable minimum age, you may not use the App.

4. Local Data Storage

  • Your music library is stored locally on your device. Generated songs, prompts, and preferences are stored only on your phone.
  • No cloud sync. Your library is not backed up to our servers. If you delete the App or switch devices, your generated songs will be lost.
  • No account required. The App does not require you to create an account, sign in, or provide any personal information to use it.

5. AI-Generated Content

5.1 How It Works

When you submit a prompt, the App forwards your text (or the transcription of your voice input), together with your selected genre and mood, to third-party AI music generation providers. The providers return an audio file that is saved to your local library.

5.2 Nature of AI Output

  • Generated songs are produced algorithmically and may vary in quality, style, and faithfulness to your prompt.
  • We do not guarantee that any particular prompt will produce a specific result.
  • The same prompt may produce different outputs each time it is submitted.
  • AI-generated content may inadvertently resemble existing works. You are responsible for how you use the output.

5.3 Ownership & License to Use

  • Subject to your compliance with these Terms and our third-party providers' terms, you may use the songs you generate for personal, non-commercial purposes.
  • For any commercial use, you are responsible for ensuring that such use complies with applicable law and with any restrictions imposed by our AI providers.
  • The Company retains all rights to the App itself, including its code, interface, and branding.

5.4 Prohibited Prompts

You agree not to submit prompts that:

  • Are unlawful, defamatory, harassing, hateful, or infringe the rights of others
  • Attempt to generate content that impersonates a real artist or mimics a specific copyrighted work
  • Contain sexually explicit content involving minors, or any content that exploits or harms minors
  • Attempt to extract, reverse-engineer, or abuse the underlying AI models
  • Violate the acceptable use policies of our third-party AI providers

We reserve the right to reject, filter, or block any prompts at our discretion.

6. Data Ownership

6.1 Your Data

  • You own your local library. Generated songs and preferences stored on your device remain on your device.
  • No server-side storage of your library. We do not store your music library on our servers.

6.2 Aggregated & Anonymized Data

  • We may create aggregated, anonymized, or de-identified data from analytics information for research, analytics, and service improvement purposes. Such data cannot be used to identify you.

7. Subscriptions and Payments

7.1 Subscription Plans

The App offers a free tier with a limited number of song generations. To create additional or unlimited songs, you can subscribe to Musly Premium through the Apple App Store.

7.2 Free Trial

Subscriptions may include a free trial period. If you do not cancel before the free trial ends, you will be automatically charged for the subscription plan you selected.

7.3 Billing

  • Payment is charged to your Apple ID account at confirmation of purchase.
  • Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period.
  • The renewal price may change; we will notify you of any price increases in advance.

7.4 Managing Subscriptions

You can manage and cancel your subscription at any time through:

  • iOS: Settings > Apple ID > Subscriptions

7.5 Subscription Expiry

If your subscription expires or is canceled, your account will revert to the free tier. You will retain access to your existing library, but further generations may be limited.

7.6 Refunds

All purchases are processed through the Apple App Store. Refund requests must be submitted directly to Apple in accordance with their refund policy:

We do not process refunds directly. For EU consumers: Your statutory right of withdrawal under Directive 2011/83/EU may apply to digital content purchases. However, by initiating a download or starting to use a subscription, you may consent to waive this right as permitted under Article 16(m) of the Directive.

8. Acceptable Use

You agree not to:

  • Use the App for any unlawful purpose or in violation of any applicable laws
  • Attempt to extract, reverse-engineer, decompile, or disassemble any part of the App
  • Interfere with, disrupt, or overload the App or connected networks
  • Redistribute, resell, sublicense, or publicly share the App itself
  • Use automated tools, bots, scrapers, or similar means to interact with the App
  • Upload malicious content, viruses, or harmful code
  • Circumvent any security measures, rate limits, or access controls

9. Intellectual Property

  • The App, including its design, code, branding, illustrations, and all original content, is owned by NOTJUST.DEV, SL and is protected by international copyright, trademark, patent, and other intellectual property laws.
  • All trademarks, logos, and service marks displayed in the App are the property of the Company or their respective owners.
  • Nothing in these Terms grants you any right to use the Company's trademarks, logos, or branding.

10. Service Availability

  • The App is provided on an "as available" basis. We do not guarantee uninterrupted, continuous, or error-free access to the App or to AI generation services.
  • Third-party AI providers may experience downtime, rate limits, or content policy changes that affect generation.
  • We may modify, suspend, or discontinue any part of the App at any time, with or without notice.
  • We are not liable for any loss or damage resulting from service interruptions or App updates.

11. Account Deletion & Data Removal

11.1 Deleting Your Data

  • Since your music library is stored locally on your device, you can delete all of it by uninstalling the App.
  • You can also request deletion of any analytics or error tracking data we hold by visiting notjust.app/musly/delete-account or contacting us at support@notjust.app.
  • Active subscriptions are not automatically canceled when you delete the App. You must cancel your subscription through the App Store before deleting the App to avoid further charges.

11.2 Effect of Deletion

  • Deleting the App permanently removes all locally stored songs and data. This action is irreversible.
  • Upon receiving a data deletion request, we will delete your analytics and error tracking data within 30 days.

12. Disclaimers

THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

We do not warrant that:

  • The App will be uninterrupted, timely, secure, or error-free
  • The App will meet your expectations or requirements
  • Any defects in the App will be corrected
  • AI-generated songs will meet any particular standard of quality, originality, or suitability for a specific purpose

13. Limitation of Liability

TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, NOTJUST.DEV, SL SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT LIMITED TO:

  • Loss of profits, revenue, or data
  • Loss of goodwill or reputation
  • Any claims arising from AI-generated output, including alleged similarity to existing works
  • Cost of substitute services
  • Any damages arising from your use of or inability to use the App
  • Loss of locally stored data due to device failure, App deletion, or updates

In jurisdictions that do not allow the exclusion or limitation of certain damages, our liability shall be limited to the maximum extent permitted by law. In any case, our total aggregate liability shall not exceed the amount you paid to us in the twelve (12) months preceding the event giving rise to the claim.

For EU consumers: Nothing in these Terms limits your statutory rights under applicable EU consumer protection laws, including Directive 2011/83/EU on consumer rights and Directive 1999/44/EC on consumer guarantees.

14. Indemnification

You agree to indemnify, defend, and hold harmless NOTJUST.DEV, SL, its officers, directors, employees, and agents from and against any claims, liabilities, damages, losses, and expenses (including reasonable legal fees) arising out of or related to:

  • Your use of the App
  • Your violation of these Terms
  • Your violation of any third-party rights, including intellectual property rights
  • Prompts you submit and the way you use the resulting output

For EU consumers: This indemnification clause does not apply to the extent it would conflict with mandatory consumer protection laws in your jurisdiction.

15. Privacy

Your use of the App is also governed by our Privacy Policy. By using the App, you acknowledge the data practices described in the Privacy Policy.

16. Changes to These Terms

We reserve the right to modify these Terms at any time. We will notify you of material changes by:

  • Updating the "Last updated" date at the top of this page
  • Providing in-app notification for material changes

Your continued use of the App after any changes constitutes your acceptance of the revised Terms. If you do not agree to the updated Terms, you must stop using the App.

17. Governing Law and Dispute Resolution

17.1 Governing Law

These Terms shall be governed by and construed in accordance with the laws of Spain, without regard to its conflict of law provisions.

17.2 Jurisdiction

Any disputes arising from or relating to these Terms or the App shall be submitted to the exclusive jurisdiction of the courts of Barcelona, Spain.

17.3 EU Consumer Rights

If you are a consumer residing in the European Union:

  • You may bring proceedings in the courts of your country of residence, in accordance with Regulation (EU) No 1215/2012.
  • Nothing in these Terms affects your rights as a consumer under applicable EU law, including Directive 2011/83/EU on consumer rights.
  • You may use the European Commission's Online Dispute Resolution platform at ec.europa.eu/consumers/odr.

17.4 U.S. Users

If you are located in the United States, any disputes that are not resolved informally shall be resolved in the courts of Barcelona, Spain. You agree to submit to the personal jurisdiction of such courts.

18. Severability

If any provision of these Terms is found to be unenforceable or invalid by a court of competent jurisdiction, that provision shall be modified to the minimum extent necessary to make it enforceable, and the remaining provisions shall continue in full force and effect.

19. Entire Agreement

These Terms, together with our Privacy Policy, constitute the entire agreement between you and NOTJUST.DEV, SL regarding the use of the App and supersede any prior agreements or understandings.

20. Contact Us

If you have questions or concerns about these Terms, please contact us:

NOTJUST.DEV, SL
C/ Balmes 129bis 4º 2ª, 08008 Barcelona, Spain
NIF: B26785477
Email: support@notjust.app