Privacy Policy
Last updated: 2 August 2026
1. Who We Are
Cella (the "App") is made by Ahmed Youssef, an individual developer based in Australia, who is the data controller for the limited personal data described in this policy. You can reach us at info@cella-ai.com.
2. On-Device by Default
Your documents are stored on your device. By default, classification and Ask AI run on-device using Apple Intelligence, and your document content is not sent to us or any third party.
3. Cloud AI Providers
If you choose to enable a cloud AI provider for a vault, the content of documents in that vault is sent to the provider you selected in order to classify documents and answer your questions. This happens only for vaults you explicitly configure to use a cloud provider. Those requests go from your device directly to the provider, using your own account and key. They do not pass through us, and we never see their contents.
4. API Keys & Credentials
Any API keys you enter are stored securely in the iOS Keychain on your device. We do not collect, transmit, or have access to your API keys.
5. Backups
Backups you create are password-encrypted files. You control where those files are stored. We do not have access to your backups or their passwords.
6. Diagnostics We Collect
We aim to collect as little as possible, and we do not sell your personal data. The App sends anonymous crash and error diagnostics so we can find and fix problems: the crash itself, your device model and iOS version, the App version, and a short code describing what failed. It never includes your documents, their names, their file paths, their contents, or anything a document produced. It does not include your name, email address, or IP address, and there is no account or advertising identifier attached. Each installation is given a random identifier so that repeated reports from the same install can be grouped; it is not linked to you.
Diagnostics are on when you install the App, and you can turn them off at any time in Settings under Diagnostics. We rely on our legitimate interest in keeping the App working correctly as our lawful basis for this, having judged that a crash report carrying no document data and no contact details is minimally intrusive. If you would rather we did not, the switch in Settings is the fastest way to object, and you can also write to us.
7. Who Else Receives Your Data
We use Sentry (Functional Software, Inc.) to receive and store the diagnostics described above, under a data processing agreement that permits them to use it only to provide that service to us. Apple distributes the App and handles any subscription payments, acting on its own behalf and under its own privacy policy. If you configure a cloud AI provider, that provider receives the document content you send it, under the terms of the account you hold with them. We use no advertising networks and no analytics beyond the diagnostics above.
8. How Long We Keep Diagnostics
Diagnostic events are deleted automatically 30 days after we receive them. We keep nothing else about you, because there is nothing else to keep.
9. Where Diagnostics Are Stored
Diagnostics are stored on servers in the European Union. Because we are based in Australia, we access them from there, which means the data leaves the EU when we read it. That transfer relies on the European Commission's Standard Contractual Clauses, which form part of our agreement with Sentry.
10. Your Rights
Most of your data never reaches us, so most of these rights you exercise directly on your device: you can switch any vault back to on-device processing, delete documents, remove cloud providers, and export your data at any time. Deleting the App removes its on-device data.
For the diagnostics we do hold, and if you are in the EU, the UK, or another region with comparable law, you have the right to ask us for a copy of it, to have it corrected or deleted, to restrict how we use it, and to object to our using it at all. Write to info@cella-ai.com and we will respond within one month. Because diagnostics carry no contact details, we may need the random installation identifier from Settings to find your reports.
11. Children
The App is not directed at children and we do not knowingly collect data from anyone under 16. If you are under 16, please do not use the App without a parent or guardian's involvement.
12. Changes to This Policy
We may update this policy from time to time. When we do, we will change the date at the top, and the current version will always be available in the App and on our website.
13. Contact & Complaints
For privacy questions or requests, contact us at info@cella-ai.com. If you are in the EU or the UK and you are not satisfied with our response, you have the right to complain to your national data protection supervisory authority.