The Percentage Calculator app by Handy Apps is a free Android app that allows you to quickly calculate percentages. The app provides four main functions: calculating percentage value and percentage, decreasing by X percent (discount or sale price), increasing by X percent (markups or selling price), and percentage change between two values. The app's user interface is simple and easy to use, making it effortless to calculate percentages on the go.

Moreover, this app also doubles as a tip calculator, making it an all-in-one solution for all your percentage calculation needs. The app is available for free on the Google Play Store and is perfect for anyone who needs to calculate percentages regularly.

Overall, the Percentage Calculator app by Handy Apps is an excellent tool that does what it promises. It is easy to use, fast, and provides accurate results. If you are looking for a reliable percentage calculator app, this is the app for you.