An app that might be worth its $28.99 price tag: Oxford Advanced Learner’s Dictionary for Android & iOS
The most I’ve paid for an app is $9.99. I’m hard pressed to name an app I might consider buying that costs more than that. However, if you do, here’s an Android app that might be worth its relatively high $28.99 price:
Oxford Advanced Learner’s Dictionary (Google Play)
A version is also available for the iPhone and is being developed for Windows Phone.