Bytes (Memory) Available for iPhone and iPod touch
iOS iPhone Utilities
Updated to work with the iPhone 5s and 64-bit ARM CPU. Requires iOS 9. (Still works with 32-bit CPUs like iPhone 4, 4S, 5).
This app displays the amount of runtime free bytes (RAM) currently available on your iPhone or iPod Touch. This is different from the storage capacity used for storing music, videos or apps. The iPad, iPhone and iPod Touch comes with 128-2048MB of runtime memory. The iPad, iPhone and iPod Touch does not use the storage memory as virtual memory, so the memory available for applications is limited to the 128-2048MB of runtime memory.
RUNNING PROCESSES The running processes table shows all applications or system processes currently active. PID is the process ID.
Updated for new devices.