Checks if your phone is properly fast charging, a notification sound is played when plugged into a fast charger
https://play.google.com/store/apps/details?id=me.milanisaweso.fastchargingchecker
https://milanisaweso.me/index.php/portfolio/android-fast-charging-checker-app/
You will need a fast charger to make use of this app
Special thanks to https://icons8.com/ for providing a free app image, http://romannurik.github.io/AndroidAssetStudio/index.html for making it easy to generate launcher icons to put into Android Studio, https://app-privacy-policy-generator.firebaseapp.com/ for helping to produce a privacy policy, and https://unsplash.com/ for the app banner image