If you want update your nice project, please, do not do this:
1 - move users from one app to another twice to do regular actions (eg: checking and view infos about place);
2 - no new value against the older app;
3 - terrible call to action message: 'keep up and meet up with your friends' (I can do this with any other social network);
4 - less features/values than older app (checkins on new app doesn't count to mayorship);
5 - block user actions in my old app(terrible way to force users move foward);
6 - until nowadays not explain to users why the new app is better than old one;
... you are invited to put more and more here...