Table 6.

Assessment criteria for the measurement functionality of apps.

Measurement criteria	Google Play Store (n=11), n (%)	Apple App Store (n=15), n (%)	Total (N=26), n (%)
Foot length	6 (55)	7 (47)	13 (50)
Foot width	6 (55)	5 (33)	11 (42)
Foot arch (medial) height	1 (9)	2 (13)	3 (12)
Foot instep girth	0 (0)	1 (7)	1 (4)
Foot joint girth (ball girth)	0 (0)	3 (20)	3 (12)
Short heel girth	0 (0)	0 (0)	0 (0)
Long heel girth	0 (0)	0 (0)	0 (0)
Heel width	0 (0)	2 (13)	2 (8)
Shoe size	2 (18)	2 (13)	4 (15)
Forefoot tilt	0 (0)	2 (13)	2 (8)
3D foot model reconstruction	1 (9)	10 (67)	11 (42)