Legal
Terms of Service
1. Acceptance of Terms
By using Prevon, you agree to these terms. If you do not agree, do not use the app. You must be 16 or older to use Prevon.
2. Platforms and Downloads
Prevon Pie is offered for Android, iOS, macOS, Windows and Linux, and these terms apply on all of them. Store builds are also subject to that store's terms. Direct downloads may be unsigned, so your system may warn you; where we publish a checksum, check it before you install. Beta builds and invite codes are provided as-is and may change or be withdrawn.
3. The Free Tier
The Free tier of Prevon is provided as-is, with all core features available locally on your device. No account is required. Your notes are encrypted on your device and stored locally; in the current build the app does not send them to us.
4. Ghost Sync
Ghost Sync is an optional end-to-end encrypted sync service that is not available in the current version and is off unless you turn it on. When available it is provided as-is, may have storage and rate limits, may change or be discontinued, and is not a backup service: we cannot restore anything you delete or lose. Stored data may expire if it is not renewed. Paid features, if offered, are sold through Stripe; price, what is included and any refund window are as stated on the page where you buy, and questions go to [email protected]. “Lifetime” offers last for the lifetime of the Ghost Sync service as described on that page (not for your lifetime), and the service may change or be discontinued as stated above.
5. Sharing
If you share content, you choose the people and are responsible for it. They can keep copies, and removing them does not retrieve what they already have. Do not share illegal content or content that infringes, harasses or exploits others. We cannot read shared content and so cannot moderate it, but we may suspend service as described in Section 12.
6. Disclaimer and Limitation of Liability
Prevon, including the app, this website, beta builds and any optional service, is provided “as is” and “as available”. To the maximum extent permitted by law, we disclaim all warranties, express or implied, including merchantability, fitness for a particular purpose, non-infringement, and that the software will be error-free, uninterrupted or secure against every attack. To the maximum extent permitted by law, we are not liable for indirect, incidental, special or consequential damages, or for loss of data, even if advised of the possibility. Your notes are encrypted under a key derived from your 12-word Recovery Seed, and we do not hold that key. If you lose your device and your Recovery Seed, your data is permanently unrecoverable and we cannot restore it. Keeping the Recovery Seed safe and keeping your own backups is your responsibility. Answers from the on-device AI can be wrong or unsuitable and are not reviewed by us; check anything that matters. The AI model files are downloaded from third-party hosts (such as Hugging Face) and are also subject to their own licences and terms. To the maximum extent permitted by law, our total liability for any claim is limited to the greater of what you paid us in the 12 months before the claim or US$100. Some places do not allow certain limits, so some of this may not apply to you.
7. Your Data
You retain full ownership of all content you create with Prevon. We do not claim any rights to your notes. Your notes are encrypted on your device and, in the current build, are not sent to us. We do not use your note content to train AI models.
8. Key-on-Device Design
Prevon is designed so that encryption keys are generated and kept on your devices, and so that any optional service we run receives only encrypted data. No software is guaranteed free of flaws, and we do not promise that this design cannot be defeated. The service can still observe limited technical metadata, such as that encrypted data exists, its size and when it is accessed; our Privacy Policy lists exactly what.
9. Account Data
The app has no accounts. When Ghost Sync is available and on, it is designed to store only the information needed to move encrypted data between your devices, without an identifier that ties that data to you. We do not hold your decryption keys. You must keep your 12-word Recovery Seed safe; we cannot recover it for you. Sync is off by default. Purchases and website forms are covered by our Privacy Policy.
10. Security
We use widely used cryptography (Argon2id for key derivation and XChaCha20-Poly1305 for encryption) and design the app to reduce the risk of remote and physical attacks. No security measure is perfect and we do not guarantee that the app is immune to attack. See our Security page for the full technical details, including the exact algorithms and the source files that prove them.
11. Changes to Terms
Because there are no accounts, we cannot contact you directly. We will post material changes on this page with a new date, and in the app where possible. It is your responsibility to check back. Continued use after changes constitutes acceptance.
12. Termination
We may suspend or terminate your access to Ghost Sync for violation of these terms or abuse of the service. This does not affect your local app, which continues to function per Section 3. Sync is off by default.
13. Governing Law
These terms are governed by the laws of the State of Nevada, without regard to conflict-of-laws principles.
14. Severability
If any provision of these terms is found unenforceable, the remaining provisions remain in full effect.
15. AI Models
Prevon Pie can download AI models that run on your device. Models based on Google's Gemma 1 to 3, FunctionGemma and EmbeddingGemma come under Google's Gemma Terms of Use and Prohibited Use Policy; by downloading or using them you agree to those, and you will pass them on to anyone you share the models with. Prevon Pith and Prevon Pulse are our own fine-tunes of Gemma and are also covered by the Prevon Model Terms: free for people, schools, researchers and non-profits, written permission for companies, never for competitors. Other models, including Gemma 4 where it is offered, come with their own licenses (for example Apache-2.0), listed in the app under Settings › About › Open source licenses. AI output can be wrong; check it before you rely on it.
16. Contact
Questions about these terms? Contact us at [email protected]. Prevon LLC, 732 S 6th St, Las Vegas, NV, USA.