Environment
Mac OS X Version 10.11.3 (15D21)
Xcode Version 7.2 (7C68)
Simulator Version 9.2 (SimulatorApp-643)
react-native-cli 0.1.10
node v5.5
The problem is in the js file that builds and runs your app. Unless your project, scheme, and Product Name are all the same, you'll get errors, especially on simulators.
The good news is that I submitted a pull request that fixes the problem. Please go upvote it so we don't have worry about things breaking when we rename things.