Mobile Apps for Foot Measurement in Pedorthic Practice : Scoping Review
Table 5 : Comparison of app ratings from the app stores and the developed rating scale .
App name Measured score App store rating ShapeCrunch 3.85 4.50
INESCOP YourFeet
FISCHER Scan- Fit
3.75 4.10
3.76 2.10
Foot Measure 2.08 2.00 SizeMyShoe 3.20 2.10
ATLAS-scan your feet !
Jenzy : Easy Kid Shoe Sizing
Shoe Size Meter-foot length
Shoe Size Converter
The Foot Fit Calculator ( BikeFit )
Foot Length Converter Size in Lite
myFoot-Rescue your feet !
Remeasure Men Body
3.42 2.00
3.82 3.30
3.56 3.70
3.49 4.90
3.55 3.00
3.11 3.00
4.23 3.40
4.03 4.40
FootFact 2.66 3.10 Swift Orthotics 3.32 5.00
Nimco Professional Shoe Sizing
4.39 2.00
Shoe-buddy 3.85 3.30 3D Avatar Feet 3.65 4.50 ECLO 3.96 5.00 FotAppenScan 2.40 3.50
Anodyne Scanner
3.63 5.00 3DsizeMe 3.93 4.20 functionality , transparency , subjective quality , and perceived impacts on users . For this work , one of the foot measurement apps reviewed in this study , INESCOP YourFeet , was additionally used to rate the internal consistency of our modified rating scale . All three independent raters considered the internal consistency of all subscale items as “ good ” to “ high .” The overall internal consistency of the modified rating scale was high at α =. 84 , which is considered excellent ( eg , [ 38 ]). The Cronbach α values were also in the range of good to excellent for the other subscales : aesthetics ( α =. 88 ), general features ( α =. 92 ), performance ( α =. 70 ), usability ( α =. 84 ), functionality ( α =. 92 ), subjective ( α =. 79 ), transparency ( α =. 90 ), and perceived impacts ( α =. 78 ).
The same method was used to measure the interrater reliability of our raters who independently reviewed the set of 26 apps in this study . The interrater agreement score ranged between . 54 and . 70 , which is considered as a fair to good level of rater reliability or agreement [ 38 ] .
Comparison of Store Ratings and Rating Scales
The store ratings of the reviewed apps were compared to the score of the apps from our rating scale ( Table 5 ). The standard deviation of the difference in the two scores for the reviewed apps was 1.07 . This deviation is not too poor considering that the score in our rating scale is an aggregated mean of the various domains that are necessary to specify the quality and criteria of foot measuring apps . Even though the ratings were within a close range of spread , there is a need for more than just the store rating to motivate users to install and use the apps since the apps reviewed in this study are not intended to be used as casual apps ( for evaluation of the
28 Pedorthic Footcare Association | www . pedorthics . org