Deutsche Tastatur is a free Android app developed by jdevsr3 that simplifies the input of German characters and numbers. With this app, users can easily input German umlauts, numbers, and date formats. However, this app is only compatible with smartphones.

To activate the keyboard, go to "Language and Text Input" and follow these steps:

1. Enable the Deutsche Tastatur keyboard (warning: see notes!)

2. Choose "Deutsche Tastatur" as the default input method.

Note that the steps may vary depending on the Android version and manufacturer. Users can also enable haptic feedback under "Sound" by checking the "Haptic Feedback" option and adjusting the vibration intensity.

It is worth noting that Android always warns about the potential data collection by third-party keyboards. However, this app does not collect any data and does not have permission to establish an internet connection. The developer has created this app with great care but cannot be held liable for any technical damages.

Although the developer has limited time to work on the app, Deutsche Tastatur remains a useful tool for anyone who needs to input German characters and numbers on their smartphone.