Measure dimensions with iPod touch
Use the Measure app 
and your iPod touch (7th generation) camera to measure nearby objects. iPod touch automatically detects the dimensions of rectangular objects, or you can manually set the start and end points of a measurement.
For best results, use Measure on well-defined objects located 0.5 to 3 meters (2 to 10 feet) from iPod touch.
Note: Measurements are approximate.
Start a measurement
Open Measure
, then use the iPod touch camera to slowly scan nearby objects.Position iPod touch so that the object you want to measure appears on the screen.
Take an automatic rectangle measurement
When iPod touch detects the edges of the rectangular object, a yellow box frames the object; tap the yellow box to see the dimensions.
To take a photo of your measurement, tap
.
Take a manual measurement
Align the center of the screen with the start point, then tap
.Slowly pan iPod touch to the end point, then tap
to see the measured length.To take a photo of your measurement, tap
.Take another measurement, or tap Clear to start over.