I bought the full version now it's prompting me to purchase subscription

Lot has happened on this thread since I last checked.

One thing at the time,

So JBird, what is wrong with your purchases? Do you know that purchasing a full version from Google does not give you full version on Windows or iOS, nor the My RealDash subscription.

If you want to access all platforms and all premium content, you need to go to my.realdash.net, make an account and purchase the subscription. Then you need to log in from ‘Settings->User’ on each device in order to activate the subscription on that device. Also note that there is a device limit on how many devices can be used at the same time. You can remove ‘unused’ devices from My RealDash web page, or by simply logging out in RealDash.

Now, if you want to use your Google purchase Full version on multiple Android devices, it is possible but you have to use same Google account on each device and then use “Restore Purchases” option on each new device. See this post for more details:

Restore Store Purchases - General / Frequently Asked Questions - RealDash Forum