Best Accel

1.What is Best Accel?

• It analyzes a drive log after the fact and shows the fastest time for each of four speed ranges
• There is no start button or countdown. Focus on driving, then see the results when you open the drive log (the same idea as Virtual Dyno)
• Times, the map view and image sharing are free. Personal bests per vehicle (New Best!) are a Premium feature

※ We don't recommend driving on public roads to set times. Always obey traffic laws

About Virtual Dyno →

2.How to read it

• In a drive log's details, switch the map block (top left) to "Accel" (Route / Dyno / Accel)
• The four ranges are listed:

• A range shows "--" when the drive had no matching acceleration. 0-100 km/h (0-60 mph) is often "--", and that's normal
• Units follow the speed slot on the playback screen or dashboard; if neither has one, your device region decides (mph in the US, UK and a few others)

3.See where it happened

• Tap a time to switch to Route: just that section is drawn as a thick colored line, with a dot at the start and a flag at the finish
• Tap "×" on the chip at the top right to go back to the whole route
• If no GPS route was recorded for that section (in a tunnel, for example), a message is shown instead

4.Personal bests (Premium)

• Best times are kept per vehicle profile and per range
• A new best shows "New Best!" with a sound. When you open older drives, you'll see "Best" if that drive holds the record, or the gap to your best (e.g. +0.4)
• Bests are counted by the vehicle profile used when the drive was recorded, so another car's drives never mix in
• Older drives without vehicle profile information (recorded before v1.3.0) are not counted
• If you delete the drive that holds a best, that best is removed; it builds up again as you open other drives
• km/h and mph bests are kept separately

About Vehicle Profiles →

5.Sharing as an image

• Use the share button at the top right to turn the four times into an image for social media
• The image shows the vehicle name, date, the four times, best marks (Premium), the logo, and a note that the times are estimated from recorded data
• Place names, the route and the drive log's name are never included
• Enter the vehicle name under "Vehicle info for power calibration" in your vehicle profile (Premium; "--" on the free plan)

6.How it works and accuracy

• Speed comes from the ECU (OBD2 vehicle speed, PID 0x0D). GPS speed is not used
• Drive logs hold 1–2 samples per second, so the start and finish of each range are interpolated. Expect about ±0.3–0.5 s of error; times can differ from 10 Hz GPS timers
• "0" means the ECU speed reads 0. The moment of pulling away is estimated from the first two samples after moving
• Sections are skipped if speed drops by more than 3 km/h on the way, data is missing for 3 s or more, or the run takes 60 s or longer
• ECU speed can differ slightly from your speedometer, which usually reads a little high

7.Desktop app

• Desktop v1.0.21 and later show Best Accel in the drive log's map block too (personal bests are mobile only)
• When a drive is trimmed to match a video, Best Accel (and Virtual Dyno) analyze only that range — which is why the times can differ from the mobile app

About the Desktop app →

8.FAQ