Anonymized crash reports and certain user metrics are collected automatically by Apple or Microsoft, respectively. I have the ability to see them. No other information is collected by this app.
Train Throttle for Apple devices (coming soon) and Train Throttle for Windows devices lets you use your Apple or Windows device as a JMRI/WiThrottle control. You can access functions 0-12 (0-28 on Windows), as well as control multiple units on the fly, toggle switches, and set routes.