Jim,
At this time, there is now subscription model on Android. Only on the iPad. This will be added in the next few days. In looking at your account, your subscription and universal upgrade goes out to 2/15/205.
In the next Android update there will be a Subscribe / Register option in the Menu. This is where you will put you email and password. It will then link you tablet to your account and you'll be able to see the Expiry date in the Account information page under About.