Prepare your session, drive, then review every run in the paddock: its score and what cost you points, the top-down replay against your best, the video with the measurements. Feature by feature, here's what the app measures, what it shows, and what it does for you.
Screenshots and videos from the test version, with the app shown in French, taken on the Android emulator with the unit simulated on a PC or with demo measurements, on a layout set up for the example. None of the figures shown come from a real track.
Five lines in order: the measurement source, the position, the vehicle, the layout and the offline map. Each one turns green when it's ready, and “Start session” lights up.
without an RTK fix, the app warns you that the score will be less accurate, without stopping you from driving;
your car doesn't have a profile yet? Default dimensions are enough to get started;
no layout? Quick mode starts with a single tap.
The live screen
The phone in landscape, on a mount: the angle and speed in very large figures, the section of the layout you're in, and the RTK quality at the bottom.
five views: Simple, Overview, Follow, Rear or Camera, with the measurements on the image;
the ghost in real time: your best run, the last one or the perfect ghost. The gap is shown next to the figures, at the same spot on the track;
live faults: a missed clipping point or a straightening shows up as soon as it happens.
Runs, all by themselves
Once the session is started, runs are detected as you cross the start and the finish, and are recorded automatically, even with the screen off or on another tab. Nothing to touch between two runs.
A box shows the last score and reopens the live screen; a banner reminds you of the session on every tab. If the app stops, the session resumes when it restarts.
Measuring and scoring
The score, competition-style
A live run, 12 seconds, no sound: the angle and speed compared with the ghost, a straightening mid-drift flagged at clipping point 2, then the score once back in grip, 78 points, 11 less than the best run.
Every run scored once back in grip
When the run is over, the score out of 100 appears on the live screen, with the gap to your best run and the faults recorded. It's calculated from what the unit actually measures:
the angle: average, maximum, and its stability, in other words the corrections;
the speed: at the initiation and at its lowest;
the line: the distance to each clipping point, and how much of each zone the car filled;
the swing: the body's rotation speed at the transition.
Several scoring profiles, inspired by competition scoring systems, weight these criteria differently; a more playful profile, for friends, puts angle and swing first.
Every point explained
No black box: each criterion shows its weight, its score and what explains it, in figures. “71 km/h at the initiation”, “44° average, 55° maximum”.
section by section: the initiation, each zone, each clipping point and the transition have their own score, compared with your best run;
faults: clipping point missed beyond its tolerance, going off track, spin, straightening mid-drift. Each one says what it costs and why (“19° for 0.26 s”), and shows up on the replay;
Compare: the angle and speed curves of two runs overlaid, with a cursor that gives both values at the same spot.
In the paddock
Review, understand, compare
The top-down replay of a run, 8 seconds, no sound: the car's silhouette and, in dotted outline, the perfect ghost pulling up to 9 m ahead, with the angle, speed, lateral g and gap to the ghost below the map.
The top-down replay, and the ghost
Your car's silhouette, to the scale of your vehicle profile and at its true angle, replays the run on the IGN aerial photo, at 20 measurements per second. Below the map: the angle, speed, lateral g and current section.
the trace is coloured by angle, speed or gap to the ghost;
the angle fringe, one tooth per measurement, shows at a glance where the angle rises, holds or drops;
the ghost drives alongside, aligned on distance travelled: you compare at the same spot on the track, not at the same moment.
As a ghost: your best run, the last one, any other, a friend's run received by file, or the perfect ghost, the line that would give the best score on this layout, limited to what your car has already done.
The export settings.The animation exported by the app, 8 seconds, no sound: the run from above, the angle and speed changing, the score.
The video, with the measurements
Film with the phone on its mount, or import the video from an onboard camera. The app syncs it to GPS time by itself, using the time recorded by the camera, then to the exact frame if needed.
It exports it as MP4 with the angle, speed, score and a mini-map overlaid, vertical for social media or horizontal. Nobody filmed? The top-down animation can be exported too, as shown here.
Layouts
Your track, your clipping points, your rules
A layout created on the aerial photo, sped up, 12 seconds, no sound: the left edge, the right edge, the start and the chase box, the initiation at cones 3-2-1, the two clipping points, then the finish, with each step's instruction below the map.
A layout, three ways
on the map: everything is drawn on the IGN aerial photo. The fastest, as accurate as the photo;
on foot with the unit: you walk the edges and place the cones, surveyed to the centimetre. The most accurate;
by driving: one slow lap along each edge, then the rest on the map.
Your track has no marked edges? Trace its centre line and give its width. A layout can be kept offline and sent by file.
One checklist, in order
All three ways follow the same list: the layout type, the edges, the used portion, the start, the initiation, the clipping points and the zones, the finish, the name. Each completed step turns green.
a locked step tells you what to do first;
each step tells you what to tap, and has “Undo last point”, “Clear this step” and “Confirm”;
anything missed is flagged with its fix: a finish too close to the end of the edges offers to extend them;
a completed step reopens with one tap, and the draft is kept, even if the app stops.
Drift and tandem starts, by the rulebook
Choose your event's rulebook, or “Custom”: it prefills the start values and checks your layout, always as a warning, never a block.
solo: the standing start, the initiation on a line or at cones 3-2-1, and the start of judging, which you can move;
tandem: the lead's lane, the chase's maximum setback (8 m by default, from 0 to 30 m), the end of the lane markings, side-by-side or single-file start.
Everything is drawn on the map, when creating the layout as well as on the live screen and the replay. A layout can also be a track day type: a start line and a finish.
For everyday driving
Without a layout, in pairs, and between sessions
Quick mode
No layout to hand? One tap on “Quick mode” starts capturing. Every drift gets a score out of 100 as soon as it ends:
60% for the average angle, from 0 points at 10° up to 100 points at 50°;
40% for the average speed, from 0 points at 20 km/h up to 100 points at 80 km/h.
The path you take doesn't count: no line, no clipping point. Next to the score: the maximum angle and speed, the duration and the distance drifted. A drift of less than one and a half seconds is counted separately, without a score.
Tandem analysis
Your run and a friend's, received by file, replay together: synced on GPS time if you drove together, otherwise starting from the same line. You choose who leads and who chases.
The analysis measures the chase's proximity between the start of judging and the finish: the average gap and the share of time spent close. It also flags a chase that got ahead of the lead before the initiation.
The session logbook
Each session keeps its runs, its figures and its sheet: tyres, hot pressures, setup, weather and comment. Enough to compare two setups from one day to the next.
Counters for fun: kilometres drifted, longest drift, maximum angle. A run or a whole session can be sent by file to a friend, who opens it in their app and can use it as a ghost.
Your measurement sources
Three ways to measure, to choose in Settings:
the unit via Bluetooth, the normal way;
the unit via Wi-Fi, through the phone's hotspot;
phone only, with its GPS and gyroscope: a few metres of accuracy and an estimated angle, enough to try out the app.
The source status can be read at a glance: RTK fix or not, satellites, measurement rate, battery, age of the corrections.
Offline maps
A layout's aerial photo can be saved on the phone, with one tap in the checklist, for tracks with poor signal. Without an account, your runs never leave the phone.
Phone only
No unit? The app works with the phone, mounted in the car. The day you get a unit, you pair it using its QR code, and the app offers to switch to it.
Your car, at its real dimensions
Wheelbase, widths, overhangs and position of the unit, with a measuring guide for each dimension. They draw the replay's silhouette and reference the measurements to the rear axle.
Together · beta
Your friends, your layouts, your leaderboards
Friends' activity.A layout's leaderboard.
The social side, in beta
With an account, by invitation during the beta:
friends and their activity: runs, records, layouts created, with “Watch replay” and “Race against”, where their run becomes your ghost;
shared layouts, suggested based on your position when you arrive at the track;
a leaderboard per layout, among friends, by club or for everyone. The server recalculates each run's score itself, with the same calculation as the app: nobody can get in with a made-up score;
live tandem: the two phones exchange their positions over 4G, and each one sees both cars and the gap between them. The server relays these positions without keeping them.
Everything is private by default: sharing a run, appearing in a leaderboard or showing your profile always needs your consent. Without an account, the app works entirely on the phone.
These two screenshots show the Community with simulated data: drivers, scores and activity are fictitious.
Want to try it?
The beta is by invitation, with your Android phone. No unit needed to start.
Your friends, your layouts, your leaderboards
The social side, in beta
With an account, by invitation during the beta:
Everything is private by default: sharing a run, appearing in a leaderboard or showing your profile always needs your consent. Without an account, the app works entirely on the phone.
These two screenshots show the Community with simulated data: drivers, scores and activity are fictitious.