Sentinel Privacy Policy

Last updated September 4, 2026

Sentinel is a market-intelligence terminal available on the web, iOS, and macOS, built and operated by an individual developer (Prateek Kher). This policy explains what data the service touches, why, and how you can control it.

Accounts & sign-in

You can create a Sentinel account with Sign in with Apple. From Apple we receive a stable anonymous user identifier and, if you choose to share them, your name and email address (which may be Apple's private relay address). We use these only to create your account, show your name in the app, and link your subscription to you. We never receive your Apple ID password.

A small number of people use Sentinel through an operator-issued access key or an allow-listed Google account instead. For Google sign-in we receive your email address and name from Google to check the allow-list and display your name; we do not access your Google contacts, files, or any other Google data.

Subscriptions & payments

Sentinel Pro is an auto-renewable subscription purchased through Apple's App Store (in-app purchase on iOS). Apple processes the payment; we never see your card or bank details. To recognise your subscription across devices we store the App Store transaction identifiers, product, status, and expiry that Apple sends us, tied to your account. You can manage or cancel the subscription at any time in your Apple ID settings (Settings › your name › Subscriptions). Apple's standard licensed application end-user license agreement applies to the apps.

What we collect

• Account & session data: your display name, email (if shared), the Apple user identifier, and session identifiers so the app knows you're signed in. Sessions can be revoked (signed out) at any time from the app's settings.
• Subscription data: the App Store transaction and subscription status described above.
• Usage data: basic request metadata (IP address, approximate country derived from IP, device/browser type) used for security, abuse prevention, and understanding which features are used.
• Diagnostics: the apps use Sentry to collect crash reports and performance traces (device model, OS version, app version, stack traces). These are not linked to your identity for advertising purposes and are used only to fix bugs.
• Questions you ask the AI assistant: if you use "Ask AI", your question and the answer are processed to generate a response and may be briefly logged for debugging and abuse prevention.
• Preferences & notifications: watchlists, view settings, and, if you enable alerts, the minimum identifier needed to deliver them (a device push token or a Telegram chat ID).

We do not collect financial account information, card details, or government ID numbers.

What we don't do

• We do not sell or share your personal data with third parties for advertising.
• We do not run third-party ad networks or cross-app trackers in the apps.
• We do not provide financial, investment, or trading advice. Market data, news, and AI commentary shown in Sentinel are for informational purposes only.

Third-party services

Sentinel relies on infrastructure and data providers to operate: Apple (Sign in with Apple and App Store subscriptions), Railway (hosting and database), Google (optional sign-in), Anthropic (the AI assistant), Sentry (crash reporting), and market/news data providers (including Finnhub, Twelve Data, FRED, Yahoo Finance, Binance, and CoinGecko). Each processes the minimum data needed to fulfil its function (for example, your question text is sent to Anthropic to generate an AI answer). If you opt into Telegram alerts, message delivery is handled by Telegram.

Data retention & deleting your account

Account, session, and subscription records are kept while your account exists. You can delete your account from inside the iOS app (More › Delete Account), which permanently removes your account, sessions, and subscription record from our servers. Deleting your account does not cancel an active App Store subscription; cancel it in your Apple ID settings. Server logs and crash reports are retained for up to 90 days. You can also request access to or deletion of your data by email (see Contact).

Children

Sentinel is not directed at children and is not knowingly used by anyone under 16.

Changes to this policy

If this policy changes materially, the "Last updated" date above will change. Continued use of Sentinel after an update constitutes acceptance of the revised policy.

Contact

Questions about this policy or requests to access or delete your data can be sent to prateekkher28@gmail.com.