This application is one of the applications that allowed me to learn React Native. It offers a discount calculator as well as a prorated calculator. The default theme is the dark theme.This application work on IOS and Android. The actual test sample is for Android.
This application is currently only available on Android. The IOS IPA file is not signed yet. To test the application, you can download it on this website and install it on your smartphone.
You can clone the repository to modify the code. Please mention and contact me if you decide to post a modified version of the application.