App privacy policy
For the Mathemagie apps installed through Google Play and the App Store. The website has a policy of its own.
Controller
Lars Vogel
Haindaalwisch 17a
22395 Hamburg
Germany
E-mail: lars.vogel@vogella.com
In short
The apps need no account and no sign-in. They carry no advertising, no in-app purchases and no social network integration. No profile is built about anyone, and no data is sold or passed on for advertising.
Which apps this covers
This policy covers the apps listed here. What an app actually processes is in its row; an app not listed is not covered by this policy.
| App | Crash reports | Usage statistics | Saves |
|---|---|---|---|
| Magic Math Arena | yes | only with consent | on the device only |
Saves and settings
Saves, the characters you create and your settings are stored only in the app's private storage on the device. They are never sent to a server, they are deleted with the app when it is uninstalled, and nothing is synchronised between devices.
Crash reports
When an app that sends crash reports crashes, the fault is transmitted through Firebase Crashlytics (Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland) so it can be fixed. What is sent is technical: device model, operating system version, app version, the time, the state of the app at the moment of the crash, and a randomly generated installation identifier. No name, e-mail address, location or advertising ID is collected.
The legal basis is the legitimate interest in a working app (Art. 6(1)(f) GDPR). Reports are deleted after 90 days at the latest.
Usage statistics
Anonymous usage statistics through Firebase Analytics (same provider) are off by default. They are collected only after being switched on explicitly in the app's settings, and they can be switched off there again at any time. What is then collected are the events Firebase records automatically, such as the app starting and moving between screens, together with device type, operating system, language and approximate region.
The legal basis is consent (Art. 6(1)(a) GDPR). Withdrawing it takes effect for the future and does not affect processing carried out before.
No advertising ID
The apps do not collect the device's advertising ID. The library that reads it is excluded from the apps, and the matching permissions are explicitly removed from the Android manifest. There is no cross-app tracking.
Notifications
Some apps can remind you to practise. Those reminders are scheduled and raised by the device itself; there is no push service and nothing is sent to a server. They can be switched off in the app and in the system settings.
Transfers outside the EU
Google may process the data named above on servers in the United States. This rests on the European Commission's standard contractual clauses and on Google LLC's certification under the EU-US Data Privacy Framework.
App stores
The download itself runs through Google Play or the App Store. What data that involves is Google's and Apple's responsibility and outside our control. No personal data about individual users is received from them.
Children
The apps are made for children. Nothing personal is asked for: no name that identifies the child, no e-mail address, no date of birth and no photograph. A mage name chosen inside the app stays on the device. The decision about usage statistics rests with the parents, because it is made in the settings and stays off until somebody turns it on.
Your rights
You have the right to information, rectification, erasure, restriction of processing, objection and data portability. Consent once given can be withdrawn at any time. You also have the right to lodge a complaint with a supervisory authority, in Hamburg the Hamburgische Beauftragte für Datenschutz und Informationsfreiheit.
Because the apps work without an account and transmit nothing that can be tied to a person, a request for information or erasure usually cannot be matched to a single installation. Everything stored locally is removed by uninstalling the app.