The SwissArmy Knife App [Free] contains a set of tiny tools: a flashlight, a unit converter, a timer, a stopwatch, a compass a bubble level, a calculator, a magnifying glass (Android 2.2+ required), a mirror (Android 2.3+ and front camera required) and a ruler. Each tool does what it is supposed to do. There’s no space for special effects like 3D compass, talking level, psychedelic flashlight etc: the goal is to have a lightweight, fast and easy to use set of tools, one “tap” away from your home screen. This app is half the size of a common “standalone tool” like a compass, a flashlight or a magnifying glass. This way you’ll save a lot of disk space. You’ll save network consumption too, not only for the first download but for every update too. It doesn’t require network access, the permission to write on your flash memory or the permission to read your contacts.
Download: Google Play