iPhone 7 Plus So, I guess just take this is a PSA combined with an 'anyone else?' kind of post. Last night, it was working fine. Today, trying to grab a couple of free apps (an altimeter, etc) wasn't working. I'd tried other random apps from different categories as a test, same result. I'd click on the [Get] button, which turned into an [Install] button (as expected). Tap on that, and the TouchID prompt came up. Engage the TouchID, the window dismissed pretty quickly as I would expect, but the button shifted almost instantly back to [Get]. No download. I killed the App Store app and restarted it, same behavior. I rebooted the phone. Same behavior. If I disable TouchID for the 'App Store & iTunes', it worked ... I didn't get prompted for my password, though (which is to be expected for a free app ... I wonder why it was asking for TouchID in the first place?) FWIW, that fixed it. I disabled TouchID for 'App Store & iTunes', downloaded a free app, went back in, re-enabled TouchID for AppStore/iTunes, and downloaded another free app. It still prompted me for TouchID, but then downloaded.