Armv7s supported from iPhone 5, 5c, 5S, iPod touch-5, iPad-4, iPad Air. that’s nothing but based on processor. Armv7s designed for A6 processor. Supporting from IOS6+. It’s also support for 64-bit coding but processing get slow in those devices with armv7s instruction set.
Same as, Arm64 devices are from Iphone 5s, iPad Air. That’s related to A7 Processor. Best advantage of these device is 64-bit support.