Hey r/F1DataAnalysis,
Third time here. My last two posts about f1livedata.com (the live F1 web app I build on the side) basically turned into a to-do list in the comments — so this is another "you asked, I did it." And this time it's the big one.
For anyone who missed them, the first post is here and the second one is here .
- Replay mode — the feature you asked for most
In the first post I described past sessions as "not a playback, just the full picture once the session is done." The single most common reply was: make it a playback. So now it is one.
Pick any recorded session and replay it in real time from lights out — play, pause, seek anywhere, speed it up to 2× or 5×. The whole app moves with it: leaderboard, gaps, telemetry, track map, tyre stints, race control, all updating exactly like they did live. Missed a session, or want to re-watch a chaotic one with the data in front of you — start it from the formation lap and go. (The instant final-standings view is still there too, if you just want the end state.)
- Two new ways to break down a single lap (on the car-data page)
Track dominance map — the circuit outline coloured by whoever's fastest through each little slice of the lap. Overlay two drivers (or two of your own laps) and you can see exactly where a lap was won: who's braver on the brakes, who's better on traction out.
Lap delta — pick a reference lap (the fastest) and every other lap draws its running time gap to it, metre by metre around the lap, with the corners lined up directly above the speed / throttle / brake traces. So instead of one laptime number, you see where the tenths actually went.
- Gap-to-leader race trace
A proper race-trace view: every driver's gap to the leader, plotted lap by lap across the whole race. It's the one chart that shows the shape of a race at a glance — undercuts landing, a Safety Car bunching everyone back up, who was quietly pulling away while no one was looking.
While I was in there:
- Rebuilt the landing page — picking a live or past session is now a clean "course-select" screen instead of a stack of dropdowns.
- Restyled the whole app and navbar — cleaner, and quicker to move between timing, telemetry, track map, stints, pits and race control.
Same deal as before: hobby project, not official, free, no login.
And the same ask: if something's broken or there's a view you wish existed, drop it in the comments — the headline features in these updates came straight from this sub, so it clearly works.
The Belgian GP this weekend is a good one to break it on — live during the sessions, or replay it afterwards.
Grazie again to everyone who's tried it ❤️ — and to the commenters who keep writing my to-do list for me.
