iOS Universal Utilities

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The MemoryInfo+ app shows how much memory is available and the types of memory on your iPhone, iPod Touch and iPad.

The iPhone, iPod Touch and iPad comes with 128MB to 2GB of runtime memory. The iPhone, iPod Touch and iPad does not use the storage memory as virtual memory, so the memory available for applications is limited to the 128MB-2GB of runtime memory.

Memory types:

Free memory
This memory is not being used currently

Wired memory
This information can't be moved to disk, so it must stay in RAM. The amount depends on the applications you are using.

Active memory
This information is currently in RAM and has recently been used.

Inactive memory
This information has not recently been used but will remain in RAM until another application needs more memory but no free memory is available. If called upon by a process, this is quickly changed to Active memory; if it has been swapped to the hard disk, it will be moved back to RAM and marked as Active.

Page ins / Page outs
"Page ins/outs" refers to the amount of information moved between RAM and the hard disk. This number is cumulative amount of data that iPhone OS has moved between RAM and disk space.

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