The T4A Guide App is linked to the Google Account that made the purchase. Normal Google Play App store rules apply and there is nothing specific about our App that differs from standard App store rules.

Google could possibly allow you to download the App onto several devices linked to the same account and they may change this rule if they suspect it is being abused. But that is something that customers should then should take up with Google.
If your device is stolen and you get a new one and sign in with that same account you should be able to download the T4A Guide App again.