COMPUTER BILD Netztest is a free utility and tool application available on Android 9.0. Developed by RadioOpt GmbH, this app lets you participate in testing the German mobile network to find weak spots and improve the overall quality of the network. By using real devices and data plans, the app measures the performance of your mobile network where you use it.

The app includes two main features: Speed Test and Coverage Map. The Speed Test measures the speed and latency of your UMTS, LTE, and Wi-Fi network on a speedometer, which is separated into upload, download, and ping speed. After each test, you receive an assessment of your result, comparing it to users in your region. The archived data can be accessed anytime and viewed on the integrated map view. The Coverage Map displays network availability depending on your current position and shows the network coverage of each provider.

The app does not store or process personal information like phone numbers, contacts, or IMSI, and you can always stop the data collection by uninstalling the app.

Overall, COMPUTER BILD Netztest is a useful and informative app that helps you test your mobile network and improve its quality.