But a number between 0.00 and 6.6666667? Color me confused.
Exploring Apple’s 3D Touch
r. kevin nelson
1134

The documentation for the force property says ‘The force of the touch, where a value of 1.0 represents the force of an average touch (predetermined by the system, not user-specific).’

I assume that means the max force the sensor can detect is 6.67 times the average force.

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITouch_Class/#//apple_ref/occ/instp/UITouch/force