Trusting the app on an Android device.

While installing the app, you see an “Install Blocked” due to unknown sources error.

In order for the app to be available for use on an Android device, you will need to need to allow or trust the app.

From the home screen or menu go to Settings > Security. Then under the Device Administration, check the box next to Unknown Sources. You should now continue installing the app.

Please note that this location may vary from device to device and manufacturer as they all have their own user interfaces.