Triangle Calculator is a free Android app developed by KenKe in the Utilities & Tools category. As the name suggests, it is a trigonometry calculator that helps solve right angle triangles in an easy way. The app calculates the lengths and angles of a triangle when two values are known, and also calculates the triangle's area and perimeter.

One of the unique features of this app is that it draws a proportionally correct triangle after the calculations. Users can rotate and mirror the triangle as needed. Additionally, users can specify the number of decimals for lengths, angles, and area. The app also allows users to reuse and edit the last specified values after clearing and change the color theme on backgrounds.

Overall, Triangle Calculator is a useful tool for anyone working with right angle triangles, whether it be for work or school.