Share your experience!
I've been playing with the Sensor Camera app:
https://play.google.com/store/apps/details?id=com.wilfredo.bigol.sensorcamera&hl=en
This has a slider adjustment for JPEG compression quality. At 75 the file size is about the same as the Sony Camera and set at 100 the file size doubles. However I can't judge yet if there is any improvement in photo quality. Try it and see what you think.
tested this,and yes the file size increased but quality still the same.
looks like NO 3rd party camera app can override stock Sony camera algorithm on the ISO and oversharpening 