A screenshot from SMARTsize showing a schematic of a SMART highlighting two embedded DTRs and inputs for sample size computation.s

SMARTsize is a tool which allows users to design and compute sample size for sequential multiple-assignment randomized trials with binary or continuous outcomes that are collected at the end of the study. It’s designed in collaboration with Kelley M. Kidwell.

SMARTsize is currently under active development: please let me know if you find bugs or other issues related to usability!