How to fix the sims freeplay on iPhone 5s without uninstalling and reinstalling it?

I don't want to lose everything. It's not working. It won't open or load ever since it updated this morning. Is anyone else having this problem? I already tried rebooting my phone and turning the Wi-Fi off and on and it didn't help.

Don't uninstall the app, but go into your setting or set upsomething like aplications or app maniger, and just end the app it will just restart the app, its just like if your phone is messed up, you would restart it wouldn't you. So just end it but don't worry because all of your data and progress will all be okay and saved