Not useful
App input of sizing information limits you a particular size such as S, M, L for a category which may not be the sizing you use. Example, underwear is in S, M, L, but my size is 6. Error in footwear conversion chart (for example male shoe size 44 is equivalent to 11.5 but is actually a 10.5.) Uses sliding scale to enter sizing which is difficult to slide to the exact size. Cannot enter any brand information where sizing does vary.
Drdul about
Sizer – Size converter, v1.3.1