Thanks for that feedback! The physical buttons argument is a good one. I don't think the battery life issue is a real one--when you're not actively calculatin

Thanks for that feedback! The physical buttons argument is a good one. I don't think the battery life issue is a real one--when you're not actively calculating a new graph, the app is doing very little. I suppose we should actually benchmark using it for 3-4 hours at a time. Can't argue about legal calculators. Though saying "friendly [physical] UI" seems like an oxymoron to me--physical graphing calculators have some of the worst graphics I've ever seen.