Measure It Super Simple (MISS) activity tracker: (re)design of a user-friendly interface and evaluation of experiences in daily life.

This study offers a generic structured methodology and a list of design requirements to adapt the interface of an existing activity tracker consistent with the skills and needs of the elderly. The MISS activity seemed to be successfully (re)designed, like the elderly who participated in this pilot study reported that anyone should be able to use it.IMPLICATIONS FOR REHABILITATIONThis study provides an overview of important characteristics of the activity tracker interface for elderly individuals that can be used when choosing an appropriate activity tracker.This study can serve as a model that demonstrates how to adapt other eHealth and mHealth tools to improve the user-centred design.The MISS activity seems to be an elderly-friendly activity tracker that can facilitate a meaningful experience.