For installing the Waternet program through Google Play Store, your Tablet needs to have some specific Software- and Hardware requirement. The Software needs to be an Android Version 4.4 to Version 7.1.2 The Hardware needs to have the following components, so that you can install the program on the Tablet at all:
Bluetooth receiver
WiFi or 3G / 4G network
Camera
GPS receiver
Internal memory
By clicking the link you will find the current version of the Waternet software in the Google Play store.