Checking long-term memory usage of iOS apps
Instruments can be used to check the short-term memory usage of an app, but is there any way to check the memory consumption of your iOS app when it's been used heavily and foregrounded/backgrounded on iOS 4, say for a week?
Keep instruments open for awhile, through multiple uses of your application. Try every possible iteration of what a user could do. Let it sit, throw it in the background.. etc.
If you do not have any memory problems in the short to mid term, it stands good reason that you will not have any in the long term.