Download the GDPS
How to Install
PC Installation
To install the GDPS on PC, extract the contents of the .zip folder that you downloaded and place the folder anywhere you like. To open the GDPS, open the folder and then open the Geometrix2.exe file.
Mobile Installation
To install the GDPS on Android, simply open the .apk file that you downloaded and you should be prompted to install it. Install it like you would with any regular app.
To install the GDPS on iOS, you must either jailbreak your device or sideload the app using a program such as Sideloadly.