Here is an ergonomic gadget that makes it easy to measure your child’s height. The Kiko Laser Height Measurer can give you a reading at the touch of a button. It comes with auto calibration. The Kiko scale is also worth a look. It is a smart body composition analyzer that can measure BMI, body fat, water, visceral fat, bone mass, and other parameters.
You will be able to access and track past readings on your phone. This project by Magpie Tech is currently getting funded on Kickstarter.