I understand OnTrack is in the development stage, so I will be more lenient upon criticism.
The pros:
It shows (most) of the values you would commonly need to see on a car or project
It connects automatically upon opening OnTrack and has been pretty consistent
Everything loads pretty quickly, and updates about every second or two
To my understanding, its the only app that allows you to watch your car values on your carplay screen. So it has the edge for first to do it!
The cons:
There’s a recurring 4$ a month charge to access all the features. There wasnt any mention of this that I saw in advertising nor the immediate app description until I finally got my device to connect. Unexpected, but I understand OnTrack is still under development.
Compatibility isnt great. Im no software engineer, only a mechanic, so im sure theres a great effort into trying to make an app that is compatible with every scanner. However, I tried 3 bluetooth obd scanners before I decided to give in and buy the recommended Vgate Icar Pro 4.0le. Also note there was the 4$ monthly charge I had to dish out for all the viewable values after already buying said scanner. After this it took a second to connect and load, but has worked flawlessly since.
There isnt many features. Apart from displaying values and changing from Imperial to Metric, and clearing PCM DTCs; theres no light mode, no gauges, or any smaller format windows for carplay. Either OnTrack is open and taking up the entire screen, or it isnt.
Like I said; its still under development, and I appreciate the feature to suggest future features, but the monthly charge and trouble I (as well as others) had went through to get it to work had me hoping for a little more, especially with how much the description hyped it up. Anywho, I am glad OnTrack exists, and I applaud the efforts of the author. I will continue to support and use OnTrack and hope for more features as time passes!