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(Rechnen = german for calculating)
This is a simple, but configurable mental calculation trainer.
- originally a dark themed App from the age of Android 4
- for this version, nearly everything of it was rewritten
- new UI (most changes were made at the config screen)
- Kotlin instead of Java
- training logic separated from the UI
- Room as database abstraction instead of using sqlite directly
- object serialization using JSON instead of a custom format