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3 stars: - Does exactly what it's designed to do and does it flawlessly. I wish I found it sooner. I no longer have to worry about the influx of error ridden updates. I can always revert back to a previous version. This functionality should be a standard feature built into all mobile devices. Sadly though, it loses a star because it doesn't stop running when closed. It continues to run, using upwards of 80mb of RAM, unless you force stop it or reboot. This is with all automation disabled in settings. It's clearly a bug. It loses a sec...