Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go.

You can clear the app cache on an Android tablet to free up space on the device and help solve app performance issues.

There's a new method of jailbreaking the latest Kindle firmware, and it works by injecting code via Amazon's own ads.

The jailbreak itself is called AdBreak, and it uses a vulnerability in the way Amazon serves ads to jailbreak your device. You'll need access to a computer and a data cable to do it, but the procedure ...