The app uses our mobile web interface, but we’ve done a lot to make that smoother in preparation for this release. We’re hoping eventually to support all Android devices, and are sad that KitKat isn’t supported on more. For this we are saddened and sorry :/ But we’re happy to have something out there.
And you’ll be happy to know that this was the most requested feature in our recent poll of what our users wanted most. We started working on it the day after the poll, so thanks for the feedback.