Out of 199+ eye chart pro remote control apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
This application turns your iPhone or iPod Touch into a remote control for an iPad app, allowing you to test vision. It works with several versions of the iPad app and offers a free preview with the option to unlock additional functionality.
Instantly connect to and control devices remotely with the ConnectWise Control app for iPhone and iPad. Resolve support issues, access devices securely, host remote sessions, transfer files, and more. Try it out at www.connectwise.com/control and share your feedback.