I have a SQLite DB that I'm using to store app data, and I could do with taking a look inside it to debug a problem I'm having - but where does the iPhone Simulator store its data, typically?
For Xcode6+/iOS8+
~/Library/Developer/CoreSimulator/Devices/[DeviceID]/data/Containers/Data/Application/[AppID]/
Accepted answer is correct for SDK 3.2 - SDK 4 replaces the /User folder in that path with a number for each of the legacy iPhone OS/iOS versions it can simulate, so the path becomes:
~/Library/Application Support/iPhone Simulator/[OS version]/Applications/[appGUID]/
if you have the previous SDK installed alongside, its 3.1.x simulator will continue saving its data in:
~/Library/Application Support/iPhone Simulator/User/Applications/[appGUID]/