The security report shows that the app is safe. Unwetter-Alarm has been originally designed by Land24 GmbH and it is related to the Weather category. The tool has been downloaded and set up by over 100K users and the latest update is dated Oct 17, 2020.
On Google Play, this application has been rated 2.7 by its users. A lot of users set up the app on their Samsung and HTC devices. A free .apk installation package of Unwetter-Alarm 1.3 can be downloaded from Droid Informer and you can take a look at users' reviews on this site. Prepare 3 MB of free space on your device for this app installer and keep in mind that it works fine on Android 4.1 and higher.