Privacy Policy

Last updated: June 2026

The short version: SlyOS runs on your phone, on your own Anthropic API key. Your messages, memory, and keys are stored locally on your device. Belto does not run a server that collects, stores, or sees your personal data.

1. Who we are

SlyOS is an Android launcher application made by Belto ("we", "us"). This policy explains what happens to your data when you use it. Questions: support@belto.world.

2. Data stored on your device

SlyOS keeps your imported chats, contacts, learned facts, voice profile, notes, checklist, drafts, papers, settings, and your API keys in local storage on your phone. This data is not transmitted to Belto. Clearing the app's data or uninstalling it removes this data; you can also reset memory inside the app.

3. Data sent to Anthropic

To generate replies, summaries, papers, and other AI output, SlyOS sends the relevant prompt and context to the Anthropic API using your own API key. That processing is governed by Anthropic's terms and privacy policy (see anthropic.com/legal/privacy). We do not receive or retain a copy of those requests.

4. Permissions we use, and why

Notification access — to read incoming messages and reply to them on your behalf.
Accessibility / "Total Recall" (optional) — to read on-screen text into your private, on-device memory. This is off by default and gated by a toggle; secure fields (passwords) are not captured.
SMS, Contacts, Calendar, Camera, Microphone — to send texts, find people, check availability, answer visual questions, and take voice input. Each is requested only when used.

All permissions are granted by you and can be revoked in Android settings at any time.

5. Third-party services

If you choose to use them, SlyOS connects to services using your accounts/keys: Anthropic (AI), Zenodo (publishing papers), Telegram (bot), and X/Twitter (posting). Your use of those services is subject to their own terms and privacy policies. SlyOS does not add advertising or third-party trackers.

6. The website

This site is static and does not set tracking cookies. Our host (Vercel) and our download host (GitHub) may log basic technical request data (such as IP and user-agent) as part of serving the page and file, per their own policies.

7. Children

SlyOS is not directed to children and is intended for users 16 and older.

8. Your control

You control your data: reset the memory in-app, remove your keys, clear app storage, or uninstall. Because the data lives on your device, you hold and manage it directly.

9. Changes

We may update this policy; the "last updated" date will change. Continued use after an update means you accept the revised policy.