App to track number of clicks for user testing

Hello everyone,

I am part of a group project that is evaluating an app and one part of the project is to use some form of a usability metric to compare the app we are evaluating against other competitors apps. My question is: are there free apps out there on both Andriod/IOS that lets us track the amount of times a user clicks while using an app? My team has decided to use number of clicks as the usability metric to compare against competitors apps and I am having trouble finding an app that lets me track the number of clicks. Do you have any recommendations for such an app?Any help will be appreciated, Thank you