Privacy policy
Effective from 1 December 2026. Cool English works without sign-up – we don’t know your name or email.
1. Who processes the data
The controller is Kvintech solution, s.r.o., Company ID 24663379, Kostelní 78/15, 796 01 Prostějov, Czech Republic, registered with the Regional Court in Brno, section C, file 108200. Contact for data protection questions: support@kvintech.com.
2. In short
- The app doesn’t require an account, name, email or phone number.
- Your study statistics (what and how much you studied) stay on your device only.
- We only send anonymous technical data and data about purchases and activation codes to our server – so we can deliver purchased lessons and know how many people use the app.
- We don’t sell app data and don’t use it for advertising.
3. What data the app processes
| Data | Purpose | Legal basis |
|---|---|---|
| Anonymous installation ID – a random identifier the app creates on first launch | telling devices apart without an account, assigning purchased courses | performance of a contract |
| Technical device data – platform, OS version, model and manufacturer, screen size, phone and app language, app version | making the app work properly, fixing bugs, usage statistics | legitimate interest |
| Usage data – dates the app was used and number of launches | finding out how many people use the app | legitimate interest |
| Purchase data – product, date, transaction and order ID from the App Store / Google Play, possibly price and currency | verifying the purchase with Apple / Google and unlocking the course, handling complaints | performance of a contract |
| Activation codes – code used, date and device; attempts to enter a code | activating the course, protection against abuse and code guessing | performance of a contract, legitimate interest |
| Lesson downloads – which package, when and with what result | delivering recordings only to authorised devices, running the server | performance of a contract |
| IP address | data transfer and protection against abuse (rate limiting); we only store an irreversible hash and the derived country | legitimate interest |
Data that stays on your device only
Study statistics, lesson play counts, study plan, player and reminder settings. You can delete them in the app (Settings → Service actions) or by uninstalling the app.
App permissions
- Notifications – only for study reminders you switch on yourself. Reminders are scheduled by the phone itself.
- Background playback – so lessons keep playing with the screen off.
- Photos (add only) – used only by a service function for creating screenshots; regular users don’t use it and the app never reads your photos.
Analytics and crash reports
To improve the app we may use Google Firebase (Analytics and Crashlytics), which process anonymous app usage data and technical error data. The provider is Google Ireland Ltd.; data may be transferred outside the EU under standard contractual clauses. Details: firebase.google.com/support/privacy.
Payments
Payments are processed by Apple (App Store) and Google (Google Play) under their own policies. We never receive your card details or your Apple or Google account data.
4. The website www.cool-english.online
To measure traffic, the website uses Google Tag Manager and Google analytics tools (Google Ireland Ltd.), which may store cookies in your browser and process data about your visit (e.g. pages visited, device and browser type, approximate location). Data may be transferred outside the EU under standard contractual clauses. You can restrict cookies at any time in your browser settings. The server logs standard technical access data (IP address, time, requested page, browser type) for operation and security.
5. Who has access to the data
We process the data on our own server in the Czech Republic. Only authorised staff of the controller and the hosting provider have access. To verify purchases we communicate with Apple and Google.
6. How long we keep the data
We keep data for as long as the app and related services are operated, but no longer than needed for the purposes above. Purchase data is kept for as long as rights arising from the purchase can be claimed. On request, we will delete the data linked to your installation ID.
7. Your rights
You have the right of access, rectification, erasure, restriction of processing, data portability and the right to object to processing based on legitimate interest. Since we don’t know your identity, we’ll ask you for your installation ID (shown in the app under About). You can lodge a complaint with the Czech Office for Personal Data Protection (www.uoou.gov.cz) or the data protection authority in your country.
8. Children
The English for kids course is intended for children, but the app doesn’t ask anyone – children included – for personal data such as a name or email. In-app purchases are subject to Apple and Google parental controls.
9. Changes
We may update this policy. The current version is always on this page.