US user base
Download application
Peeples QR

Features:

  • location based
  • lightweight
  • communicate with nearby users
  • push messaging
  • send pictures
  • search for users
  • privacy control
  • ...

I think the makings of a top shelf app that's pure Android to the core is there.
Androidcentral review

There are a number of social community apps that started life as web applications and have now gained mobile counterparts. Here's one that's starting life as a mobile application - specifically for Android.
XDA review