RaceHF, with
the app it deserves.

What RaceBuddy adds

Predicted 1/4 mile, live

A continuously updated projection of your elapsed time while you are still accelerating. Bracket and class racers use it to decide whether to lift before they break out — the receiver alone cannot do this, because the maths happens in the app.

DIFF time against a reference run

Pick a baseline pass and watch the live delta against it. Useful for dialling in, and for telling whether a change actually did anything.

Real hp and torque from one pull

Type your car and the AI Smart Garage fills drivetrain, weight, gearing and frontal area. One clean acceleration run returns a power and torque estimate corrected for slope, density altitude and rolling resistance.

Lap timing on the same box

Automatic circuit detection from a global track database, sector splits, live delta and theoretical-best lap. Compare your telemetry against your own laps or against public leaderboard laps, corner by corner.

Video overlays and social cards

HD recording with synchronized telemetry, green-screen export for post production, custom layouts with your own branding, and one-tap run cards sized for Instagram and TikTok.

Getting connected

1. 1.Charge your RaceHF and switch it on.
2. 2.Install RaceBuddy and open the device screen.
3. 3.Pick your RaceHF from the Bluetooth scan — no adapters, no cables, no account required to look around.
4. 4.Start a run. RaceBuddy detects launch automatically; you do not touch the phone while driving.

Not sure which receiver to buy? Read our Dragy vs RaceBox comparison →

Common questions