The total deviation in timekeeping between the first snapshot & the most recent.
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Track the accuracy of the timepiece 
as more snapshots are added.
Most Recent Rate
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a real-time mechanical watch analyzer
for iPhone & iPod touch.
Average Rate
For nearly half a century, the highest standard of accuracy for Swiss watches has been evaluated using cameras synchronized to precise clocks.

Twixt Time brings precise, camera based, time measurement technology 
to the iPhone and iPod touch.
Cumulative Rate
Take a snapshot of the dial of an analog clock or watch.
The rate of accuracy in timekeeping between the two most recent snapshots.
Track the accuracy of multiple timepieces. 
ultiple ways.
Record the position of the hands.
An average of all of the recorded rates for a given timepiece.