You're three corners into a hot lap and you glance down at the dash to check your speed — and the reference you needed is gone. That look down is the most expensive moment in driving. RaceVoice deletes it. It's your in-car coach, and it talks to you so you never look away from the track.
Short version: RaceVoice is a driving coach that rides with you every lap, calls your corner speeds out loud, records everything, and afterward turns the session into data and video you can learn from. One app, from the first corner to the highlight reel. Drive Faster. Eyes Up.
It runs on the iPhone or Android phone in your pocket, on patented voice-guidance technology (U.S. Patent 11,151,900). Everything you'd normally read off a dashboard, it speaks instead, timed to land right where you can act on it.
What a $500-a-day coach is actually doing
Hire a professional driving coach and you're looking at $500 to $1,000-plus for a day in the right seat. They're worth it — but a huge part of what they're doing is simpler than it sounds: watching three numbers in every corner. Your entry speed, your minimum speed, and your exit speed. Those three tell a trained eye whether you're driving the car properly, because together they're a direct readout of your racing line.
Here's how they connect:
- Entry speed is how fast you arrive at turn-in. It tells the coach whether you braked too early — leaving time on the table — or too late, blowing past the turn-in point and running wide. The right entry puts the car in the right place, pointed the right way, ready to take the corner. That's the start of a good line.
- Minimum speed is your slowest point, at the apex — and it's where lap time lives. A proper line lets you carry the highest possible minimum through the corner. If your minimum is low, you over-slowed or took a line that scrubbed speed. Raise it and you're faster through the entire corner, not just one point.
- Exit speed is how early and hard you got back to power. It depends on rotating the car and being on the right line at the apex so you can unwind the wheel and accelerate. And it compounds — a couple mph more at exit carries all the way down the following straight.
String them together and that's the whole arc of a good corner: brake to the right entry, hit the highest minimum on the proper apex line, then unwind for maximum exit onto the straight. A coach in the passenger seat is essentially estimating those three numbers lap after lap and telling you which one is off.
RaceVoice doesn't estimate. It measures the exact number off your own GPS trace, in your own car, and says it out loud the instant you reach the corner — deterministically, in real time, every single lap, on exactly the corners you chose to work on. "Entry… seventy-four" before you commit to turn-in. "Minimum… forty-one" at the apex. Not advice, not an opinion — the speed you just drove, handed back at the one moment it helps. You hear forty-one, you carry forty-two next lap, the voice confirms it, and you've climbed a rung.
And there's no processing or AI guesswork in any of it. RaceVoice isn't inventing a target or modeling some ideal lap — it's reporting your speeds, in your car, in real time. That's exactly what makes the number something you can drive on. You use it to feel out the car and the track: hear your minimum through a corner, sense how much grip you had left, and ask the car for a little more next time through. The voice tells you straight away whether the car took it. Lap after lap you're not guessing, and you're not second-guessing some algorithm — you're building real confidence on numbers you produced yourself, nudging the edge up one reachable increment at a time.
The whole loop
The coaching is the heart of it, but RaceVoice is the whole session:
- Set up your car, pick a track from the 90+ built in (or record your own), and choose your callouts.
- Go on track — a live HUD shows your lap time, your gap to your best lap, speed, and G-forces while the coach speaks. It records GPS telemetry and camera video the whole time.
- Review — compare laps on a speed chart and read the segment splits that show exactly which corner cost you time.
- See it — Video Studio burns the telemetry onto your footage: best lap, a hero reel, bloopers, or side-by-side.
Then you go back out faster — no laptop hunched over between sessions, because the analysis is just those three speeds and a clock.
Who it's for
I built RaceVoice for track-day and HPDE (High Performance Driver Education) drivers first — the weekend run-group folks chasing their own times, not pros with a data engineer in the trailer. If you've ever come in knowing you left time out there but not where, the number tells you where.
Drive Faster. Eyes Up.
That's RaceVoice: an in-car coach that hands you your own entry, minimum, and exit speeds — out loud, at the instant you can use them — then records the session so you can find the time and watch yourself take it back.
Follow along as I build RaceVoice in public.
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