I now have an Android version of the Sing Harmonies App available on Google Play. It works just like the iOS version and comes loaded with three harmony songs: Lean On Me, Teach Your Children, and Swing Low, Sweet Chariot. All of the 38 additional songs available for the iOS version are also available for the Android version via in-app purchase. Detailed song info is here. If you like the app please leave a review on Google Play. Check out the app here.
I've been learning and singing the alto harmony part for Helplessly Hoping, Take it Easy, Imagine, and a bunch of other great songs. We still need to add the soprano, tenor, and bass singers--we're hoping to add ten new songs to the app by the summer. Meanwhile, our developers are still hard at work on an android version of the Sing Harmonies App, which will include all the same songs as the iPhone/iPad version.
Sing Harmonies 3.0 is now available at the App Store: is you already own it definitely update it, updating is free--this version is much improved and easier to use. We are now in the beginning stages of developing an Android version of the app, as many singers have asked us to do.