We should support Google Play delta updates
Tech Crunch  says that developers don't have to do anything to benefit from smart updates. Here is where Google talks about it , doesn't mention or link to developer resources for this. Can we check if indeed it works like magic or we need to be making some changes?  - http://techcrunch.com/2012/08/16/google-turns-on-smart-updates-for-android-apps/  - http://developer.android.com/about/versions/jelly-bean.html
It looks like the change in the Google Play Store is server-side, so this should work with older / most versions of the app, not just a particular one. Some videos of it in action: http://www.androidpolice.com/2012/08/16/google-flips-the-switch-on-smart-app-updates-in-the-play-store-video/
When I updated to Fennec 15.0b6 just now the Google Play UI reported a full 18MB download. That's using a Galaxy Nexus using Jelly Bean (4.1.1). Anyone else tried it ?
Google handles this for us
Beta 15->16 update just now is 19.02MB. Don't think it's working.
I've seen the progress bar show more than one total size during the download, and when showing the full size suddenly complete before getting close to the end. Perhaps the UI is crappy ?
Renom if we get any docs from google
There is nothing for us to complete here. Google either provides delta updates or not.
They don’t because we're an NDK based application.