LapSnap frequently asked questions

AiM Solo 2, Solo 2 DL, MyChron 5, MyChron 5S, MyChron 6 and other AiM devices with Wi-Fi (Solo 2 guide, MyChron guide); RaceBox Mini and RaceBox Mini S over Bluetooth (RaceBox guide); and GoPro cameras with GPS (GoPro guide).

You can also import CSV exports from RaceChrono (import guide) and RaceBox, or record with just your phone.

Yes. Since version 2.6.0 you can record a session with just your phone, with no lap timer or camera (Standalone guide). You can also create sessions from RaceChrono and RaceBox CSV files.

Yes. LapSnap is used for karting, motorcycle track days and car track days. When you download a session you choose the track and the vehicle you drove.

Only to process new sessions. Sessions you have already downloaded are cached on your phone and work offline. Downloading from your lap timer or camera uses its own Wi-Fi or Bluetooth connection, and LapSnap then needs an internet connection to process the session.

Turn on Wi-Fi on your AiM device and connect your phone to it in your phone's Wi-Fi settings. Open LapSnap, tap the plus button, choose the session and tap download. For a GoPro, LapSnap finds the camera over Bluetooth and then joins its Wi-Fi (GoPro guide).

Then choose the track, track condition and vehicle for the session. LapSnap needs an internet connection to process the session, so you may need to switch to cellular data or another Wi-Fi network at this point.

Downloading a 20-minute session takes about 30 seconds from a GoPro and 10 to 40 seconds from an AiM device, depending on how many channels it logged. Uploading for processing takes a few seconds for an AiM file and from 10 seconds to a couple of minutes for a GoPro file, depending on your connection. If a session shows Processing, pull down to refresh your list of sessions.

An Optimal Lap combines your best sectors from every lap of a session into one lap. LapSnap divides each lap into four sectors, so the Optimal Lap shows the time you could reach if you put your best sectors together.

Snap to Position compares two laps at the same spot on the track instead of at the same moment in time. It shows the speed, acceleration and time delta of both laps at that location. This way, you can compare a slower and faster session to see what the two users are doing differently at that specific point on track.

A dedicated lap timer updates 10 to 25 times a second, and this data is usually very accurate.

When you use just your phone with a 1 Hz GPS, LapSnap applies smoothing techniques and other phone sensors to approximate your location as best as possible. These systems were developed and tested at the track, and have consistently been within 0.1 seconds of a more sophisticated lap timer (how phone timing works).

The delta time (Δt) graph shows where you gain or lose time compared to another lap, so you can see which parts of the track to work on.

LapSnap is free to download and free for your first session. All Access adds pro data, leaderboards and more. It starts with a free trial, then costs $9.99/month in the US, with discount options available for yearly passes. Prices vary by country.