Vaastu Compass is an Android app developed by Para Digital Technologies that provides simple Vaastu tips along with a magnetic compass. The app aims to help users improve their daily lives by giving them direction and guidance based on Vaastu Shastra, a traditional Hindu system of architecture.

The app works by using the device's magnetometer to indicate the heading direction of the top of the device when placed in the position of the surface level of the earth. Vaastu tips are indicated as you rotate and point to any particular direction while standing in the middle or center of your house.

Before using the app, users are advised to go to the center of their house and calibrate their device's compass/magnetometer. The calibration process is simple and can be found by searching for "calibrating my android compass" under images section of any search engine.

Overall, Vaastu Compass is a useful app for those interested in Vaastu Shastra and looking for simple tips to improve their daily lives. The app is free to use but contains ads.