MyMonero native iOS app & JavaScript based Android & Desktop apps will come soon!
/u/fluffyponyza (XMR core dev):
The JS version is done, but that's basically the desktop version that kinda-runs-ok on Android. Currently we're finishing off the native iOS version, and then we can release a full gamut of desktop and mobile apps, whilst starting work on the native Android version. We don't want the native Android release to hold up the general release, but the JS version's performance is subpar compared to the native iOS one.