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) |