Last updated: September 15, 2026
Texbook is a free Kâ12 Math learning app for students in Cambodia. This Privacy Policy explains what information we collect and how we use it.
You can browse Texbook's books, lessons and quizzes without signing in. To remember your learning progress on your device, we store a randomly generated anonymous device identifier locally on your device.
Some schools give their students an account so that progress and results follow the student rather than the device. These accounts are created by the school or teacher, not by students themselves, and they hold the student's name, email address and a password. If your school has not given you an account, none of this information is collected about you.
In the Android and iOS apps we also collect anonymous technical information for crash reporting and analytics, described in sections 3 and 4.
The anonymous device identifier is used to save and restore your learning progress (for example, quiz results and lessons viewed), to group crash reports that come from the same device (see section 3), and to group analytics events from the same device (see section 4). We do not use it to identify you personally.
Where a school account is used, the name and email address identify the student to their school and let them sign in. We do not use them for advertising, and we do not send them to Google or any other third party.
The Texbook mobile app for Android and iOS uses Firebase Crashlytics, a service provided by Google, to tell us when the app crashes or runs into an error so that we can fix it. The website version of Texbook does not use crash reporting.
When the app crashes or encounters an error, a report is sent to Google containing:
These reports never contain your name, email address, phone number, location, or the contents of your quiz answers. The identifiers are random values that are not linked to you as a person. We use crash reports only to find and fix problems in the app, and we do not use them for advertising or to track you across other apps or websites.
Crash reports are processed and stored by Google on our behalf. Google retains them for a limited period (currently 90 days for crash details) in accordance with the Firebase Privacy and Security policy.
The Texbook mobile app for Android and iOS uses Google Analytics for Firebase to understand how the app is used, so that we can see which lessons and books students actually reach and where the app is failing them. The website version of Texbook does not use analytics.
The app sends Google a record of actions taken in the app, containing:
These records never contain your name, email address, your account identifier, the answers you gave to any question, or anything you typed. We do not send Google any information that would let it work out who you are.
Texbook does not use an advertising identifier. On Android the advertising ID permission is removed from the app, and on iOS the app does not include Apple's advertising framework at all. Ad personalisation is switched off, and we do not link Texbook's analytics to Google Ads. We do not use analytics to track you across other apps or websites.
Analytics records are processed and stored by Google on our behalf, and are retained for a limited period in accordance with the Firebase Privacy and Security policy.
We do not sell your data, and we do not share it with anyone for advertising. Apart from the crash reports in section 3 and the analytics records in section 4, both of which go to Google as our service provider, we do not send information about you to third parties.
We do not collect your device's location, your phone number, your contacts, your photos, or the answers you give to individual questions. We do not use an advertising identifier, and we do not track you across other apps or websites.
Some lessons include videos embedded from YouTube. When you watch an embedded video, YouTube may collect data in accordance with its own privacy policy. We embed videos using privacy-enhanced settings where available.
Texbook is intended for students, including children. Students who use Texbook without an account are not asked for any personal information, and the crash reports and analytics records described in sections 3 and 4 contain only anonymous technical information that is not linked to a named student.
Where a school gives a student an account, that account holds the student's name and email address, and the school decides which students receive one. We do not use this information for advertising or profiling, and we do not share it with third parties. Parents and guardians who want to know whether their child has an account, or who want it removed along with its results, should contact their school or write to us at the address in section 9.
We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date.
If you have any questions about this Privacy Policy, please contact us at koeungkosal@gmail.com.