Basic Calculator App for Android using Kotlin Programming Language. It was created using API 30 (Android 11). However, it supports Android versions newer than API 21 (Android 5.0 Lollipop).
This app uses Keval, a Kotlin library for string evaluation. Link to the repository: https://github.com/notKamui/Keval Huge thanks to https://github.com/notKamui/