Privacy policy

WatchStudy privacy policy

WatchStudy keeps study data on your devices and private iCloud account. Product analytics and Apple Ads attribution help us understand how the app is used and how our own ads perform; optional AI requests fulfill features you choose to use.

Last updated October 13, 2026

Information WatchStudy collects

WatchStudy stores decks, flashcards, and study progress locally on your devices and can sync them through your private iCloud account.

If you use AI features such as deck generation or import cleanup, the topic or study text you submit is sent through our Cloudflare proxy to Anthropic (Claude) to generate cards. If Anthropic is unavailable, it may instead go to Google Gemini, our backup provider, or, for some requests, to an AI model run by Cloudflare. It is used only to generate the cards for that request.

Product analytics

WatchStudy collects product analytics and derived study-topic metadata to understand activation, study flows, sync reliability, and product usage. Events use an app-level identifier so we can follow a customer journey through the app. When Apple Watch syncs with iPhone, the Watch can use the same app-level analytics identifier to connect the study journey across devices.

Your device sorts each deck into a general subject, such as languages or medicine, and sends only that category, along with language, content type, event counts and feature usage. We don't send your flashcard text, deck contents, or prompts. Earlier versions of the app also sent some text typed into text fields, such as deck names and study topics, through PostHog's automatic interaction capture. We've turned that off, and we use the text already received only in aggregate, to understand which subjects people study.

PostHog also processes IP addresses and derives approximate location, such as country and city, for product analytics. This information can be associated with the app-level identifier. WatchStudy does not request GPS location for this analytics processing.

  • app opens
  • onboarding progress
  • deck creation
  • study session starts and completions
  • paywall interaction
  • sync reliability
  • device and platform usage
  • coarse derived deck categories such as law, math, language, or medicine

Feedback you send

If you answer a one-tap question in the app, WatchStudy records which option you chose as a product analytics event.

If you write to us in Talk to us, or add a note after answering a question, your message is sent to us through PostHog only when you tap Send. Messages are not linked to your analytics identifier, and no IP-derived location is attached to them. Your email address is included only if you turn on “I’d like a reply”, and the app version only if you leave “Include app version” on.

We use these messages only to support you and improve WatchStudy. We do not attach your decks, cards, or purchases. You can email us instead if you prefer.

Apple Ads attribution

On supported iPhones, WatchStudy uses Apple's AdServices attribution token to learn whether an installation came from one of our Apple Ads campaigns. RevenueCat sends the token to Apple and may receive campaign, ad group, and keyword information.

RevenueCat can associate that information with subscription activity so we can measure our own ads. The token does not provide us with your age or gender.

Session replay and diagnostics

WatchStudy uses PostHog session replay on a sample of iPhone sessions to understand navigation, taps, and usability issues.

Text and images are masked on your device before anything is sent, so recordings do not show your decks, cards, notes, or anything you type. We do not record network payloads, and we do not use automatic capture of what you type.

Third-party services

WatchStudy may rely on Apple iCloud for sync, Cloudflare for proxying app services and analytics ingestion, PostHog for analytics and for feedback messages you choose to send, Anthropic (Claude) for AI generation when you choose to use it, with Google Gemini as a backup provider, and RevenueCat for subscription management and Apple Ads attribution.

Payment details remain handled by Apple and the App Store purchase flow.

Data deletion and contact

You can delete local study data inside the app, remove the app from your devices, and manage synced data through your Apple and iCloud settings where applicable.

We use analytics to improve the app and, in aggregate, to measure our own Apple Ads campaigns. We do not sell analytics data or use it to serve third-party ads.

If you have privacy questions, contact palmtreedreamsinc@gmail.com.