Get it.
This does the job. Its the only one I saw in the App Store. For some reason stuff stays in the cache and never cleans down. This app helps to tackle this. However I would recommend you do some other cleanup as well and then this app keeps it that way.
I was ready to buy a new iPhone at 64gig because I barely had half 100MB and every time I opened FB I would lose that and go to zero memory. I was deleting every app I could.
As I prepared to buy a new phone and transfer my SIM card to a new phone I wanted to unlock the old SIM (I paid off my phone so time to unlock it). So I backed up to iTunes, then completely wiped my iPhone, which reset the carrier based on their unlock command from TMO central, and reinstalled my backup. Well guess what I went to 5.8 free GIGs. All that memory was jammed up in the iPhone.
I then found this app and have been keeping my phone sparkling clean since. Oh and by the way I didnt reinstall FB, I created a link on my home page for it. So now FB runs fast and doesnt store crap on my phone chewing up memory. Good luck. This is a great app. It will keep your phone clean.
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Memory & Disk RAM Scanner Pro - Master CPU System