Now Kindle Android users can join the fun.
The latest version of Kindle for Android (v22.214.171.124) mentions just one new feature in the changelog:
You can now read using left-aligned (ragged right) text instead of justified (aligned on both left and right margin). This new alignment option can be selected from the Display Settings (Aa) menu within Kindle books that support Enhanced Typesetting. On the Kindle eBook Store page, look for "Enhanced Typesetting: Enabled" in the features list.
You can see the new alignment option in the screenshot at the top of the post.
The app is available in Google Play.