Battery Guru is a convenient app includes many easy tools: Battery Booster, Flashlight,Ruler and System Status Monitor.

BATTERY BOOSTER
Battery Booster is a tool that displays the current battery level of your iPhone or iPod Touch using a percentage output and a circle indicator.

It additionally displays the remaining time in hours and minutes for the most common usage scenarios of your device:
- Standby
- Internet (Wifi)
- Internet (Cell Network)
- Talk (3G)
- Talk (2G)
- Video
- Audio

FLASHLIGHT
Flashlight turns your iPhone(iTouch) into a real brightest led flashlight.
Strobe and Blink Mode is also supported.

SYSTEM STATUS
Memory - wired, active, inactive and free memory
Storage(Disk) - Used and free disk capacity
Process Information - List All Process Running
Network - IP and MAC addresses, Hostname and WLAN, 2G/3G support Capabilities
Operating System and Hardware

UNIT CONVERT
Unit Convert lets you convert area, angles, currency, data, density, energy, force, length, mass, mileage, power, pressure, speed, temperature, time, volume, volume flow and more...
You can even create your own unit conversions for anything you want, quickly and easily.

RULER