Best dictionary, if only it worked in iOS 9

The American Heritage Dictionary is hands down the best general-purpose dictionary of American English I know, and I adore the app, which contains the entire text of the printed dictionary. However, the app isnt compatible with iOS 9; that isnt made clear in the App Store listing, but its admitted on the website, ahdictionary.com. If Id known that, Id have waited to upgrade!

S S-G about American Heritage Dictionary, 5th Edition, v6.2