The AnthroCalc app calculates percentiles and Z-scores for length/height weight weight-for-length/height body-mass index and head circumference for typically growing children (using WHO or CDC references); for children with a number of syndromes (Turner Down Prader–Willi Russell–Silver Noonan and Klinefelter); and for preterm infants (using Fenton 2013 and 2025 INTERGROWTH-21st or Olsen references). The app also performs specialized calculations of blood pressure (using NIH 2004 or AAP 2017 references) extended obesity measures waist circumference arm circumference triceps and subscapular skinfolds target (midparental) height predicted adult height and height velocity for healthy children. Citations are provided for each reference range used for the calculations. Patient-specific data derived from WHO and CDC growth charts can be stored on device for later retrieval.