Latest Wikimedia-internal iOS build on TestFlight -- anyone working for Wikimedia who wants to test but didn't get the email please let me know and I'll get you set up. Currently we can only do internal beta distribution for iOS, but we hope to be able to do wider testing again soon.
Public Android build at https://releases.wikimedia.org/mobile/android/apps-android-wikipedia-sprint2...
Note that both versions of the beta app now support logging in, creating accounts (with captcha), and basic wikitext editing.
iOS version now includes optional edit summaries, with an experimental 'canned summary' feature where you can select some common notes.
There are also updated localizations from translatewiki.net -- please give a shout if there are obvious problems with the UI not matching the phone's system language; it's our first build since the new updates went in.
Coming soon:
Android edit summaries didn't quite make it through review yet, but should be available in a beta update in a couple days.
Random-article feature is also coming on both platforms, needs some slight tweaking but should be ready in next build.
-- brion