Every number that matters
- 0-60 mph and 0-100 km/h
- 1/8 mile and 1/4 mile, with trap speed
- 60 ft time and automatic in-run splits
- Reaction time and launch quality score
- Custom speed targets — pick any speed
GPS + accelerometer · 20 Hz
Know exactly how quick your car really is.
0-60 mph, 0-100 km/h, the 1/8 and 1/4 mile with trap speed, 60 ft splits and launch G. Measured by your phone, in the time it takes to floor it.
Free to start · No account · Your runs stay on your device · iPhone coming soon
20 Hz
GPS and accelerometer fused, twenty times a second
$0
Of extra hardware. No box to buy, charge or forget
30+
Metrics per run, each one explained inside the app
24
Languages, from Portuguese to Japanese
What it does
A timing box, a dyno and a coach.
All of it already in your pocket.
Arm it, launch, and the run is detected, timed and analysed hands-free.
Sensor fusion, not GPS alone
GPS gives you position, the accelerometer fills the gaps between fixes. Together they resolve the moments a satellite-only app misses. Barometric altitude for real elevation, and a live readiness indicator so you know when the signal is good enough to launch.
Clean data, no junk runs
- False starts detected and discarded
- Runs that never left the line are dropped
- GPS accuracy warnings before and during
- Every metric explains itself — tap any stat
Analysis, not just a stopwatch
- Speed and G-force curves for every run
- Estimated horsepower and power-to-weight
- Density altitude and corrected run time
- Braking: deceleration G and stopping distance
- Speed heatmap on the route map
Coaching after every launch
Each run comes back with a tip drawn from your own data — grip, launch, where the time actually went. The "what if" analysis shows the time you would have set with a clean launch, so you know whether to blame the driver or the car.
Records that stick
- Personal best per speed target, kept forever
- Consistency and standard deviation stats
- Two runs overlaid on the same chart
- Cars, motorcycles, karts, trucks and more
Inside the app
Built to be read at a glance,
then studied afterwards.
The full story of one run
Curves, splits, conditions and a score — plus the corrected time for the day you actually drove.
Your personal bests
Every target tracked over time, with consistency stats that tell you if you are really improving.
21 true-black themes
OLED-friendly designs inspired by JDM, rally, Le Mans and drift. One free, twenty more with Pro.
Pricing
Start free. Upgrade if it earns it.
The timer, your history and your records cost nothing and always will. Pro unlocks the deep analysis.
Free
Always freeNo account, no trial countdown
- 0-60 mph and 0-100 km/h timing
- Automatic run detection, hands-free
- Full run history, grouped by session
- Personal records and progress trends
- Live speedometer and G-force
Pro
Monthly or yearlyCurrent price for your country is shown in Google Play and the App Store
- Every speed target, plus custom targets
- Full race analysis: curves, HP, conditions
- Compare two runs on one chart
- Route map with speed heatmap
- Timeslip cards for square, story and landscape
- 20 extra OLED themes
Straight answers
Questions worth asking first.
How accurate is a phone next to a dedicated timing box?
The app fuses GPS with the accelerometer to produce readings between satellite fixes, which is more precise than GPS alone. Accuracy still depends on signal quality, your device's sensors and the conditions on the day. Treat the numbers as good estimates, not laboratory measurements — comparing your own runs against each other, under similar conditions, is where the app is at its most useful.
The longer answer, including what a dedicated box genuinely does better, is in Dragy alternative: can a phone really replace a $150 performance box?
Is my run history backed up anywhere?
No. Your history is stored only on your device. There is no cloud sync and no account system, which means that if you delete the app or move to a new phone, your runs do not come with you. Cloud backup is the most requested feature and it is on the roadmap. In the meantime, exporting a run to CSV keeps every data point.
Does it work for motorcycles?
Yes. Pick the motorcycle vehicle profile and you also get lean angle tracking alongside peak lateral and longitudinal G. Cars, karts, trucks, UTVs and bicycles are supported too.
Where does my location data go?
Your runs, routes and history stay on your device. Location leaves the phone only to enrich a run you just recorded — fetching the weather and the name of the place. There are no accounts and no cross-app tracking. The details are in the Guides Privacy Policy.
Why did my run not get recorded?
The app discards runs it cannot stand behind: a false start, or a run that never really left the line. If GPS accuracy drops mid-run you get a warning on screen instead — the run is kept, but you know the time is questionable. This is deliberate: a saved time you cannot trust is worse than no time at all.
Is there an iPhone version?
It is built and in the final stages before submission. The Android app is available today on Google Play.
Next clear morning
Find out what your car actually does.
Free on Google Play. Roughly two minutes from download to your first timed run.
Measure responsibly. Use private property, a closed track or a legal drag strip. Never time a run on a public road, and always obey local speed limits. The driver is responsible for the driving — the app only holds the stopwatch.