A free app for Android, by Marble Apps.

Shapes Area Calculator: Surfac is an application for calculating the area of different 2D geometric shapes, which can be used as an educational tool for both children and adults. The application is very easy to use, with a user-friendly interface, so even people with little knowledge of mathematics can use it with ease.

How to use this application?

Just select the desired shape and enter its dimensions. If you want to calculate the area in meters, just select the meter unit and enter the desired value. You can also select the unit of measurement, which will be displayed on the screen. The application will then display the area in meters, feet, and inches.