Simple Drag Times

Simple Drag Times turns your phone into a drag timer. It measures your car's acceleration with the phone's GPS – no extra hardware, no account, no internet.

MEASUREMENTS
• 0–100 km/h from a standing start
• 100–200 km/h – as a split of a standing run or in its own rolling-start mode
• 1/8 mile and 1/4 mile with time and trap speed

AUTOMATIC TIMER
Stop the car and the timer arms itself. It starts the moment you pull away and ends when you lift off. No buttons to press while driving.

AUDIO CUES
Beeps at 100 and 200 km/h, at the 1/8 and 1/4 mile and a fanfare for a new personal best – keep your eyes on the road. Works over your car's Bluetooth and can be muted with one tap.

LIVE VIEW
• Animated speedometer with stopwatch
• GPS quality indicator: update rate, satellites and accuracy

HISTORY
• Every run is saved with its results and speed curve
• Personal bests for each discipline
• Speed curve with 100/200 km/h lines and the 1/8 and 1/4 mile marks

PRIVATE BY DESIGN
• Works completely offline – no internet needed for measuring
• No location history: coordinates are never stored
• No ads, no tracking, no account

SUPPORT
Like the app? Buy me a coffee with an optional tip (coffee icon at the top). Tips unlock nothing – every feature stays free.

ACCURACY
The app uses the raw GPS Doppler speed and interpolates between GPS fixes. Most phones deliver GPS once per second; in simulated runs the results stay within about ±0.15 s. Accuracy depends on your phone and on GPS reception, so mount the phone with a clear view of the sky. External 10 Hz receivers are not supported yet.

IMPORTANT
Use Simple Drag Times only on closed roads and race tracks. Never race on public roads and always obey traffic laws. Results are estimates and not suitable for official timing.

Recent changes:
• New:
200–250 and 200–300 km/h in standing runs and from a rolling start
mph mode with 0–60, 0–100 and 60–130 mph (switch units in About)
beeps at 250 and 300 km/h
light display for bright sunlight, now the default (dark and auto in About → Display)
optional "Buy me a coffee" tips (coffee icon, top left). Tips unlock nothing, every feature stays free.