Older iPhone/ iPod frame rate?

Do older iPods and iPhones have a frame rate of 60fps? I'm finding that all the methods for calculating time intervals on iPhone (cftimeinterval, nstimer, timesince1970, etc) are 开发者_如何转开发all giving me bad data, so I've decided assume a frame rate of 60, just not sure if older apple devices can run at this.

The frame rate is limited by the hardware to 60 fps in the older iPhones/iPods as well. Of course it depends on your application wether or not it can run 60 frames per second.