961 votesJen commented
I agree that an offline mode is essential. My daughter was going to do this on the go, but now, I don't see a reason to pay for a subscription. We were going to subscribe to this app instead of paying a music teacher so that we can do this on the go. Rosetta lets you download your units 1 at a time so you can work on the go. I'd love to see that option for this app too!