Learn Kotlin
- Based on "Android App Development Tutorial for Beginners - Your First App", at https://www.youtube.com/watch?v=FjrKMcnKahY
- Language: Kotlin
- GUI Android Studio
- https://emojipedia.org/red-heart/
- https://color.adobe.com/create/color-wheel
- Save and restore the state of the app when the app goes to or returnd from background
- Allow and show palindromes on tip, total, total per person
- Enter the amount paid and show the money expected back