Privacy Policy
Effective October 20, 2026
This policy explains what data the Shikken app (“the app”) collects, why, and who receives it. The app is published by Iskandar Iskhakov, Republic of Armenia (“we”, “us”).
Short version
- No account and no sign-up. We do not ask for your name, email or phone number.
- Your learning progress stays on your device.
- Purchases go through Apple or Google; we never see your payment details.
- Three services receive limited technical data: Adapty (purchases), Google Firebase (app usage, crash reports and answers to an optional survey) and Meta (measuring our ads). On iOS, Meta receives your advertising identifier only if you allow tracking.
Data stored only on your device
Your answers, review schedule, exam level and date, study goal, settings and reminder times are kept in the app’s local storage. They are not uploaded to us. Deleting the app deletes them. Reminders are scheduled on the device; we do not use a push-notification server.
Word audio is produced by your phone’s built-in text-to-speech engine.
Data shared with service providers
| Provider | What it receives | Why |
|---|---|---|
| Adapty | A random profile ID, purchase and subscription status, store transaction data, device model, OS and app version, country and language | Show the purchase screen, check that a purchase is valid, restore purchases; pass purchase, renewal and refund events to Firebase and Meta |
| Google Firebase (Analytics, Crashlytics) | A pseudonymous app instance ID; app events such as first open, onboarding steps, study session finished, purchase screen shown and purchases; device model, OS and app version, language, approximate country or region (derived from your IP address); crash reports; answers to the optional in-app survey (a 0–10 score and, if you choose to write them, two short comments of up to 100 characters). On iOS, without the advertising identifier | See how the app is used in aggregate and where people get stuck; find and fix crashes; understand what to improve |
| Meta (Facebook SDK) | App install and launch, device model, OS and app version; the advertising identifier (IDFA on iOS — only with your permission; Advertising ID on Android). Purchase and free-trial events: sent to Meta by Adapty on Android and on iOS if you allow tracking; on iOS if you do not, sent by the app itself through the Meta SDK, without the advertising identifier | Measure whether our ads lead to installs and purchases. Meta may also use this data under its own policy, including for ad targeting |
| Apple / Google | Your purchase, under their own privacy policies | Payment, subscriptions, refunds |
Events contain no words you studied. The only text you type that leaves the device is what you choose to write in the optional survey or in a bug report email. We do not sell your data.
Tracking choices
- iOS: the app asks for permission before Meta may use your advertising identifier. You can change this at any time in Settings → Privacy & Security → Tracking.
- Android: you can reset or delete your Advertising ID in Settings → Google → Ads (or Settings → Privacy → Ads).
Bug reports
If you report a problem with a card, the app opens your email app with a pre-filled message: the word, its card number, the deck version and the app version. Nothing is sent until you press Send. We receive your email address and whatever you write, and use them only to reply and fix the problem.
Retention
Support emails are kept while needed to answer you and for up to 2 years after. Data held by Adapty, Google and Meta is kept according to their policies. On-device data stays until you delete the app or use “Start over” in Settings.
Your rights
Depending on where you live (for example under the GDPR, UK GDPR, CCPA, APPI or PIPA), you may have the right to access, correct or delete your data, to object to processing, and to withdraw consent. Because we do not hold an account for you, most data is on your device and under your control. For data held by our providers, email [email protected], and we will forward the request.
Data may be processed outside your country, including in the United States and the European Union, by the providers above.
Children
The app is not directed at children under 13 and we do not knowingly collect their data.
Changes
If this policy changes, we will update the date above and, for significant changes, tell you in the app.
Contact
Iskandar Iskhakov, Republic of Armenia
[email protected]