Sorry for my english i will try to be simple in my explanation.
If anyone can create a Stripe plugin. (https://stripe.com/)
For me what will be needed:
-Create a layer where my user can pay for subscription.
-My app check every x day/hours if subscription is active or it lock the app.
I can pay for this plugin but if anyone make it for everyone and sell it on scirra i would be so happy to buy it.
NB: If another solution exist i would be happy to know.