Mind Hub Privacy Policy
Effective 11 November 2026
Mind Hub is a notes, diary, journal and projects app with an AI chat. This policy explains what data the app and its server handle, why, who else receives it, and how you can delete it.
Who is responsible
Mind Hub is developed by Ivan Tsukylo (“we”). For any question about your data, or to use any of your rights below, write to support@mymindhub.app.
What stays on your device
Your notes, diary pages, journal, projects, tables, drawings, voice recordings, profile picture and settings are stored only on your device. We do not receive them unless you send them to the AI chat yourself (see below). Events from your phone calendar are read on the device to show them beside your notes; they never leave the device.
Because we do not keep a copy, this data cannot be recovered if you delete the app or lose or replace your phone. Use Backup in the app to export a backup file and keep it somewhere safe.
What we collect
| Data | Why |
|---|---|
| Account: email address, nickname, password (stored only as a hash), or the account identifier from Sign in with Apple or Google | To create your account, sign you in, send verification and password reset codes, and keep your chats and plan tied to you. |
| AI chat: your messages, the notes, projects and tables you attach, the diary, journal or calendar entries you allow the chat to read, and the photos, videos, audio and documents you attach | To answer you and to show your chat history on your devices. Chat text is stored encrypted on our server; files are stored in Cloudflare R2. |
| Usage: how much of the AI allowance you have used | To apply the limits of your plan. |
| Purchases: your plan, subscription status and purchase history | To unlock the features you paid for and restore them on another device. |
| Diagnostics: crash reports, device model, operating system and app version | To find and fix crashes. |
| Analytics: which features are used, as counts and identifiers, together with an app instance identifier | To understand which parts of the app are useful. Analytics never contain the text of your notes or messages. |
Diagnostics and analytics are linked to your account identifier. We do not track you across other companies’ apps or websites, we do not show ads, and we do not sell your data.
Who else receives your data
- Anthropic runs the Claude model that writes the AI chat’s replies. It receives what you send in the chat, as listed above, only after you allow it in the app. You can withdraw this in Settings → Privacy; the chat stops working until you allow it again.
- Cloudflare (R2 storage) keeps the files you attach in the chat.
- Google Firebase (Crashlytics and Analytics) receives diagnostics and analytics.
- AppsFlyer receives an install identifier and basic app activity (installs, sessions, and purchase events forwarded by RevenueCat) to measure where installs come from. It does not receive the advertising identifier (IDFA / Android advertising ID) or any of your content.
- RevenueCat, together with Apple App Store or Google Play, processes subscriptions. We never see your payment details.
- Apple and Google confirm your identity when you use Sign in with Apple or Google.
- Dictation in the chat uses the speech recognition of your phone (Apple or Google). The audio does not reach our server.
- Resend sends verification and password reset codes to your email address. Our hosting provider runs the server.
Some of these providers process data outside your country, including in the United States. They are bound by their own terms to protect it.
How long we keep it
We keep your account, chats and files until you delete them or your account. Deleting a chat in the app removes it from our server. Crash reports and analytics are kept by Firebase for a limited period under its own retention settings.
Deleting your account
In the app, open Account → Delete account. This deletes your account, all chats, messages, attached files, usage records and subscription records from our server, and the data stored on that device. An active subscription is managed by Apple or Google — cancel it in your store settings so you are not charged again.
Your rights
You can ask us for a copy of your data, to correct it, to delete it, or to restrict or object to its use, and you can withdraw consent at any time. If you live in the European Economic Area or the United Kingdom, you can also complain to your local data protection authority. Write to support@mymindhub.app.
Children
Mind Hub is not directed at children under 13 and we do not knowingly collect their data. If you believe a child has created an account, contact us and we will delete it.
Changes
If this policy changes, we will update the date at the top of this page and, for important changes, tell you in the app.