Trainerize should sync and integrate with Fitindex Smart Body Tape Measure. They use the Fitindex App.

https://fit-index.com/products/fitindex-bluetooth-smart-body-tape-measure-with-led-monitor-display

This Smart Body Tape Measure tool by Fitindex allows you to digitally take your body measurements and if synced with Trainerize would allow you to easily take, track and update all of your body measurements instead of having to manually enter them into Trainerize.

This integration will save time, and increase client compliance with tracking their body measurements into Trainerize. It is the missing piece that would allow for complete integration and digital tracking.