Dev disclosure first, because this sub has every right to be tired of app posts. I'm the developer, it's a commercial product, and I ran it by the mods before posting. No link in the body, I'll drop it in a comment if anyone wants it. We are spending real money (actually a lot) on driving in real tracks with kart racers, car racers and professional sim racers, so please, give it a try without pre-judging (and also please, be rude if you feel so in the comments, we really want to improve).
I want to be upfront about what this is and is not, because I keep seeing "AI analysis" apps and honestly most of the skepticism around them is fair. An AI coach can only work with the data you feed it, and if that data is a phone GPS at 1 Hz, it is not going to tell you anything useful. You could load that into ChatGPT yourself and get the same vague answers.
I did not build an AI coach. What I actually spent the time on is the boring hard part, which is getting trustworthy data out of just a phone in your pocket. It fuses the phone's motion sensors at 100 Hz with the slow GPS to reconstruct lap times, the racing line, speed and cornering G, with nothing mounted and the screen locked. That is a real sensor fusion problem, not a plotter with a nice theme on top. This comes from my background in engineering, and interest about inertial systems and aerospace projects I worked on, moved to my hobby which is racing, and that I do not come from a wealth family, so + thousand euros data-loggers are not a thing for me...
Two proof points that made me feel it was worth sharing, out of a growing pile of real sessions rather than a couple of cherry picked ones.
First, when we could get ground truth, it held up. On one session I had official transponder timing to check against, and the app matched 20 of 24 laps within 0.1 seconds, with the four misses being the in and out pit laps that the transponder times on a separate loop. So the lap timing is measured, not guessed.
Second, and this is the part I personally find most useful for karting, you can compare your real laps against your sim laps. I practiced a track in Assetto Corsa beforehand, logged the real session with the same tool, and the speed traces, the line and the friction circle lined up closely.
That is something a generic AI coach cannot really do, because it is about the measurement and the comparison, not about prompting a chatbot.
We keep stacking more of this up across different tracks and vehicles, kart, car and sim, precisely because one or two good results prove nothing on their own. The more varied the data we throw at it, the faster the weak spots show, and that is exactly the point right now.
I'll be honest about the limits too. It will not magically find you two seconds. If you are a couple of seconds off pace, that is driving and setup, and no app replaces seat time and a good coach. What it does is give you honest high rate data and a real sim to real comparison, so you can see what you are actually doing instead of guessing.
Genuine questions for you, and I mean it, I want the honest answers and not the polite ones. For those of you already logging with a MyChron or an Alfano, is there anything phone data could realistically do that would make it worth your while, or is a proper logger just always going to win for you? (considering prices). And for the ones who both kart and sim, would a real sim to real comparison actually change how you practice, or is that just a nice gimmick on paper?
PS, since it comes up and I would rather say it than have it assumed. Yes, we use AI, mostly for testing and code coverage, the unglamorous stuff. The estimator and the sensor fusion are real engineering that took a long time to get right, not something generated by prompting a model. I would rather be straight about that than pretend otherwise.
If you are interested, please let me know in the comments and I will attach the links, videos, screenshots, and whatever you would like to see.
Thank you so much beforehand, I really hope that this do not annoy you :)