About overwatch stats app for Android players here...
I have developed one here:
app name is overmax.(in google play)
Features:
Stats: Get personal in-depth Overwatch stats, records, performance charts and individual skill level breakdown.
Builds: Discover in depth hero builds frequencies, win percentages, hero synergies and enemy counters pick.
Rankings: Find rankings in different Overwatch regions, including Southeast Asia, Americas, Europe, Korea, China and more