The separate Tab Pro app became a crossplatform in May 2015 and now has multiple subscription plans. Once you purchase any subscription you get access to all platforms including the Web site.
The Ultimate Guitar Tabs app for iPhone/iPod and Ultimate Guitar Tabs HD are not crossplatform and have different billing plans - one time purchase and subscriptions.
But you can always download Ultimate Guitar Tabs app for iPhone/iPod on your iPad for free:
- Open the AppStore app.
- Choose "iPhone only" filter in the upper toolbar.
- Search for our Tabs app for iPhone.
- Install it for free using the same Apple ID, that was used for purchase.