> The most useful tool I've found is Perfect Ear for Android and iOS. It's not as full-featured as GNU Solfege, but it covers all the important stuff and it's f

> The most useful tool I've found is Perfect Ear for Android and iOS. It's not as full-featured as GNU Solfege, but it covers all the important stuff and it's far easier to dip into when you have a spare moment. Oh man, I missed this app when I switched from Android to iOS. So glad it's finally on iOS!