Their iOS app could use some serious love. Not only does it have no offline capabilities (you can't even read your previous chats), if you're using the app and go offline, it puts up a big “connection lost; retry” alert and won't let you interact with the app until you get internet again. That means if you're mid prompt, you're blocked from editing further, and if you're reading a response, you have to wait until you get cell service again to continue reading.

It's one thing to not cache things for offline use, but it's quite another to intentionally unload items currently in use just because the internet connection dropped!