Mentalator — Privacy Policy
Last updated: October 3, 2026
This Privacy Policy explains how the Mentalator mobile app ("Mentalator", "the app") handles information. The app is published by KAIZEN Games ("we", "us"). You can contact us at any time at contactus@kaizen-games.com.
Summary
- Mentalator does not require an account and does not ask for your name, email, phone number or location.
- We do not operate a server that stores your personal information.
- Your settings, training plans and the detailed record of your answers stay on your device.
- We use Google Analytics for Firebase to collect anonymous usage statistics and to measure our own advertising, as described below.
- Third-party services used by the app (analytics, advertising, purchases and your device's speech recognition) may process some data, as described below.
Information stored on your device
The app saves the following data locally, on your device only: your settings (difficulty, operations, digits, voice and language), the training plans you create, and your practice statistics (for example response times and accuracy by operation and by mode). This detailed information is not sent to us. A few summary figures calculated from it are shared with our analytics service in grouped form, as described in "Usage analytics" below. The data stored on your device is removed when you uninstall the app.
Microphone and speech recognition
If you use voice answers, the app asks for permission to use the microphone (and, on iOS, speech recognition). Your spoken answer is turned into text by the speech recognition service that comes with your device's operating system (Google on Android, Apple on iOS). Depending on your device and language, the operating system may send the audio to its provider for processing, under that provider's own privacy policy. Mentalator does not record, store or send audio to us. You can use the app without granting the permission, or turn voice recognition off in Settings and answer by tapping.
Questions are read aloud using your device's built-in text-to-speech.
Notifications
If you set a schedule in a training plan, the app can show reminder notifications. These are local notifications created by the app on your device; no information is sent to us to deliver them.
Usage analytics
Mentalator uses Google Analytics for Firebase to understand how the app is used and to measure whether our own advertising brings new users. Once the consent step described below has been completed (where it applies), the app sends Google information such as: an identifier generated for your installation of the app; the date and time of the first launch and of your sessions; basic device and app information (device model, operating system and app version, language, and country or region); and usage events, for example when you start or finish a practice round, the mode, difficulty level and number of digits used, how long the round took, how many questions it had, how many mistakes were made, and whether you completed a training plan. The app also sends a few summary figures calculated from your local statistics, grouped in ranges (for example "50-199 answers" or "70-84% accuracy"), together with your main settings (mode, level, voice language and whether voice recognition is on).
This information is linked to the identifier of your installation, not to your name, email address or any account, and we do not use it to identify you. Uninstalling the app resets that identifier. We do not send the content of your answers, your voice or any audio, or the detailed per-question records stored on your device. Google processes this data under its own policies; see How Google uses information from sites or apps that use its services.
Advertising
Mentalator shows ads using Google AdMob. Ad providers may collect and use information such as your device's advertising identifier, IP address and general device information to deliver and measure ads, and may use it to show personalized ads, in accordance with their own policies. You can manage ad personalization and reset or limit your advertising identifier in your device settings. Learn more in Google's advertising policies. Ads are removed if you buy "Remove Ads".
We also advertise Mentalator on Google Ads. To measure how many installs come from our ads, we link Google Analytics with our Google Ads account. We have turned off ad personalization for this link, so the usage information described in "Usage analytics" is used to measure our campaigns and is not used by us to build personalized ads. Google's own advertising features in the app (Google AdMob, above) work under Google's policies.
If you are in the European Economic Area, the United Kingdom or Switzerland, the app asks for your consent before showing ads and before starting analytics, using Google's User Messaging Platform. You can accept or decline, and you can change your choice at any time from Settings → Privacy options in the app. If you decline, you may still see ads, but they will not be personalized.
On iOS, Mentalator does not ask for or use your device's advertising identifier (IDFA) and does not track you across other companies' apps and websites. We measure installs from our own ads with Apple's privacy-preserving SKAdNetwork attribution, which reports campaign-level results without identifying you.
In-app purchases
The app offers a one-time purchase ("Remove Ads"). Payments are handled entirely by Google Play or the Apple App Store, and we never receive your payment details. To check whether a purchase is active, the app uses RevenueCat, which receives an anonymous app user identifier, information about your purchase (such as the product and its status) and basic device and app information.
Information we do not collect
Mentalator does not collect your name, email address, phone number, precise location (GPS), contacts, photos or files, and it does not require you to create an account. Our analytics and advertising providers may derive an approximate location (such as country or region) from your IP address.
Children
Mentalator does not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will help resolve it.
Data retention and deletion
Data stored by the app on your device is deleted when you uninstall the app. Purchase records are kept by Google Play, the Apple App Store and RevenueCat under their own policies, and analytics data is kept by Google under its policies and the retention settings we choose. If you have any request about your data, write to us at contactus@kaizen-games.com.
Third-party services
- Google AdMob and Google Play Services (advertising, purchases on Android, speech recognition on Android)
- Google Analytics for Firebase and Google Ads (usage analytics and measurement of our advertising)
- Apple App Store and Apple speech recognition (purchases and speech recognition on iOS)
- RevenueCat (purchase verification)
We encourage you to review the privacy policies of these services.
Changes to this policy
We may update this Privacy Policy from time to time. The date at the top shows when it was last changed. If we make important changes, we will update this page.
Contact
If you have any questions about this Privacy Policy, contact us at contactus@kaizen-games.com.