While the Handyverse app is not available in the Google Playstore for everyone, you should be able to install it via APK in your device.
Keep in mind that this process will require you to change settings in your phone to allow for apps outside the play store to be installed, this process will be different for each device so please make sure your device can do so before continuing.
Download the Handyverse APK
Use the link below to download the the APK for the app. Keep in mind that this APK will only work on Android devices.
Place the APK on your device's storage
Now, you need to move the APK to your device's storage. You can do this via cloud, download it directly on your device, whichever method you prefer.
Open your device's file manager and open the APK
Open your device's file manager and open the APK file, this should start the installation process for the app. This is potentially also trigger some warning pop-ups where the device tries to warn you about the dangers of installing an APK, you can safely ignore the warnings and let the APK install the app.
Once Finished, your app is installed and you can use the App normally as if you downloaded it on the Google Play Store.