This is a really simple Sinatra webapp that you can use to test Stripe's example iOS apps and example Android apps.
This is intended for example purposes only: you'll likely need something more serious for your production apps.
To deploy this for free on Heroku, click this button:
Then set the backendBaseURL variable in our example apps to your Heroku URL (it'll be in the format https://my-example-app.herokuapp.com).
Happy testing!