Do I need a RaceBox or OBD adapter?

No. Drive recording, recap and HUD work with just a phone and are free. A phone measures about once a second. A 25 Hz RaceBox adds times to the hundredth, a precise line and a reliable finish line, and an OBD adapter adds engine data, both with JOY+ PRO. An ELM327 adapter has to support Bluetooth LE, and what you see from the car depends on the car.

Which circuits time laps?

It times 7: Most, Brno, Sosnová and Vysoké Mýto with a surveyed finish line. Slovakia Ring, Nordschleife and Nürburgring GP without one: when you drive with your phone there, the line is worked out from your lap. On other tracks you can record a drive, but laps aren’t timed.

Where does drive data go and how long is it kept?

The drive is saved to your account on our server and stays until you delete it or close your account. We keep the full series for 90 days, then condense it to one sample per second, keeping the peaks. Summary, lap times and map stay. Others see a drive recording only if you share it. The exception is your best lap on a circuit leaderboard (including as a ghost), and you can opt out of that. For JOY Coach’s written analysis, only numbers from the drive go through our server to OpenAI’s AI, with no coordinates and no name.

Circuit and data

Don’t stop at the lap time.

See where you gain and where you lose. Drive recording on your phone is free. Lap times, sectors and detailed analysis come with .

Live drive recording on a circuit: speed, RPM, G-force, lap time and best lap

Automotodrom Brno / REPLAY

BMW M4 · RaceBox + OBD

Speed at this point

230 km/h

Lap time

0:00.0

Measured lap 2:26.468 · original data

RPM: 5,704 rpm
Throttle: 78%
Coolant: 105 °C
Oil: 102 °C

Slowing before the bend

Speed over the lap

0:002:26.5

Sector 1Sector 2Sector 3

Where do you brake, and how do you accelerate out of a bend? Move along the lap and see how your place on the track connects to your speed.

Move to any point on the lap

A real recording from Brno. Neither the lap time nor the sensor values have been altered. The graphics illustrate the data, they aren’t an app screen. Motion is off in your device settings. Use the slider to move along the lap.

Free

Everything that matters at a glance

Speed, G-meter and time on a HUD or graphic gauges you arrange yourself. On a circuit with , also your current lap with delta to your best.

Free

Every drive in data, with just your phone

Record route, speed and elevation on your phone and come back to them in your history for free. The demo shows history without a subscription. The locked score belongs to .

Telemetry on the free tier: the Start drive button and road drive history with car, length and time

Lap times like official timing

The app detects the finish line by itself and times each lap, with delta, theoretical lap and sectors where the finish line is surveyed. To the hundredth with RaceBox.

Laps at Automotodrom Brno: best and theoretical lap, sectors in timing colours and a new personal best

A coach that tells you what to practise

After a circuit drive it shows you on a map where you’re losing time, and our server has OpenAI’s AI write an analysis with a task for next time. The coach never tells you to go faster.

More on AI data processing in the Privacy Policy.

Data straight from the car

An OBD-II adapter shows RPM, temperatures, boost and fault codes. RaceBox adds 25 Hz GPS and times to the hundredth. Both are optional, and recording works without a device.

All features

And also…

Drive recording

RecapFree
On the lock screenFree
With no signal and after an app crashFree
JOY Roads sections in the recapFree
Sharing a driveFree
Your year in the garageFree
12 badges for drivesFree
Your data is yoursFree

Live HUD and dashboard

Shift-light
Connect a device while driving
Double tap to StopFree

Circuit mode

7 timed circuits
Lap details
Member’s ghost
Replay the line
Circuit leaderboardJOY+
League
Circuit detailsFree
CarPlay Circuit iPhone

OBD-II and RaceBox

The car from data
Connection diagnosticsFree

Analysis after a drive

Drive score
Personal records
Drive line
Replay
GPX and CSV export

JOY Coach and Wingman

After every drive
Coach
Wingman on your data

Start free. Add what you’ll use.
Three tiers, depending on how you want to drive.

All three tiers

Free: Garage, community and drive recording on your phone. Selected routes to try.
JOY+: The full JOY Roads catalogue, your own drives and partner discounts.
: Everything in JOY+, plus lap times, circuit drive analysis and extended telemetry.

JOY+ from 159 CZK a month, from 349 CZK.

FAQ

Frequently asked questions

Do I need a RaceBox or OBD adapter?: No. Drive recording, recap and HUD work with just a phone and are free. A phone measures about once a second. A 25 Hz RaceBox adds times to the hundredth, a precise line and a reliable finish line, and an OBD adapter adds engine data, both with . An ELM327 adapter has to support Bluetooth LE, and what you see from the car depends on the car.
Which circuits time laps?: It times 7: Most, Brno, Sosnová and Vysoké Mýto with a surveyed finish line. Slovakia Ring, Nordschleife and Nürburgring GP without one: when you drive with your phone there, the line is worked out from your lap. On other tracks you can record a drive, but laps aren’t timed.
Where does drive data go and how long is it kept?: The drive is saved to your account on our server and stays until you delete it or close your account. We keep the full series for 90 days, then condense it to one sample per second, keeping the peaks. Summary, lap times and map stay. Others see a drive recording only if you share it. The exception is your best lap on a circuit leaderboard (including as a ghost), and you can opt out of that. For JOY Coach’s written analysis, only numbers from the drive go through our server to OpenAI’s AI, with no coordinates and no name.

Download · iPhone and Android

Your next drive starts here.

The app is available for iPhone in the App Store and for Android on Google Play.