Rangefinder

Measures distance from the iPhone to a visible object!

Simply:
1 - hold the device upright on your knee, look at the target and then tap the screen
2 - stand up, overlap the target and the image in the middle and then tap the screen

Features:
- measurement units: meter/feet
- fine calibration
- vibration alarm
- bubble level
- measurement quality indicator

Works well in range 1-50 meters
For the better results:
- use the fine calibration for known distances
- avoid vibrations
- bring upright your iPhone using the bubble level
- use 5x zoom