You can subscribe to Ripl here. Click on Start Free Trial, follow the prompts, then once you add your payment information and are logged in, you'll be able to use Ripl on any device that you have the app installed.
How much does a Ripl subscription cost?
Pricing for Ripl varies by location, but your purchase price will be displayed when subscribing. If you choose to begin a free trial, you will begin either a monthly or annual subscription once the free trial ends unless you cancel prior to the end of the free trial.
If you'd like to pay with PayPal, you can do so by subscribing through Apple or Google.
Please note that due to the subscription mechanics, your credit card details will be required to apply for the free trial. We won't charge anything until the expiration of the trial.
*Because of iTunes Store Restrictions, if you're purchasing through Apple, you will see $10/billed yearly or $14.99/billed monthly