The Track Day Telemetry App That Turns Your Phone Into a Data Logger
VlastLap delivers 100 Hz car telemetry from your phone — live lap deltas, braking analysis and a real G-G diagram, plus OBD-II engine data and exports the pros use.
Live Delta and Predictive Lap Time
The single most useful number on track is whether you're up or down on your best — and VlastLap shows it live.
- Live delta updating at 100 Hz so you feel the gain or loss through every corner.
- Predictive lap time that projects where this lap will finish.
- Consistency score 0–100 to quantify how repeatable your driving really is.
The accuracy that matters here is the repeatable delta, not absolute map position. You're comparing yourself against yourself, so any fixed offset cancels out — what's left is a clean, trustworthy comparison at 100 Hz.
Braking Analysis and the G-G Diagram
Lap time is won and lost under braking and at the limit of grip. VlastLap shows both.
- Braking analysis: threshold pressure, trail-brake depth and release point, corner by corner.
- G-G diagram revealing understeer vs oversteer balance and how much of the friction circle you're actually using.
- ZUPT pins speed to a true 0 in pit lane or a tunnel — no creeping drift.
100 Hz fusion means the braking trace and the Gs land the instant they happen, so the data matches what your hands and feet are doing.
OBD-II Engine Data, 16 PIDs
Pair an OBD-II adapter and VlastLap overlays engine data straight onto your laps.
- 16 PIDs including RPM, throttle, speed, coolant and more.
- Overlay engine channels with your G and delta traces for a full picture.
- Auto-calibration in about 30 seconds with free mounting — clip in anywhere and drive.
Automatic finish-line detection means no beacons, with up to 10 sectors and a heatmap across ~8,500 built-in circuits.
Pro Export and Remote Coaching
Your data shouldn't be locked in. VlastLap exports to the formats serious analysts already use.
- MoTeC i2, VBO (Circuit Tools), KML and GPX.
- Remote coaching over WiFi or cloud so a coach watches your laps live.
- Smartwatch support (Apple Watch / Wear OS) for delta, heart rate and haptics.
One profile, every machine: VlastLap adapts to car, moto or kart so the same app fits your whole garage.
Reserve Your Place Before Launch
VlastLap launches on 1 September 2026. We're opening a waitlist with 250 places now.
- Free tier to start logging.
- Pro at 19.99 €/year (about 1.67 €/month) with Cloud Sync, backup and web access.
- Cloud Live hour packs from 4.99 € for live remote telemetry.
Centimetre-level absolute positioning is a dedicated-hardware niche — it's on our roadmap with VlastLap Anchor (fixed OBD/ECU module) and VlastLap Halo (1000 Hz), plus CarPlay and Android Auto. Reserve your place today.