Help & common questions

Use a rigid handlebar or fork mount rated for your motorcycle (for example, a Quadlock). A secure, vibration-resistant mount keeps the reading stable and your phone safe. Mount and set everything up before you start moving.

Once mounted, tap once to zero TrueLean to your setup. It calibrates to whatever angle your mount sits at, so you don’t need a perfectly vertical or level position — any orientation works.

TrueLean starts measuring and recording lean once you’re moving above a low speed threshold. Below the gate (stopped or walking the bike) it holds at zero so parking-lot wobbles don’t pollute your ride.

Yes. If your mount orientation inverts the reading, toggle the invert-lean-direction setting so left and right match the road.

In a steady corner, gravity and cornering force combine to point straight down the bike’s own vertical axis, so a bubble level (or plain accelerometer) reads near zero mid-turn. TrueLean fuses gyroscope attitude with cornering physics — lean = atan(speed × turn-rate ÷ g) — to recover the real angle.

Readings are estimates computed from consumer smartphone sensors and GPS — not precision measurements. They can be affected by mount flex, vibration, calibration, and GPS error. Treat them as a guide for reviewing rides, never as a real-world limit. See the Safety page for the full disclaimer.

Mount flex and vibration are the biggest factors, followed by GPS error and signal loss. Use a rigid mount, re-zero if you move the phone, and give GPS a moment to settle. TrueLean’s on-device model also refines its estimate the more you ride.

Yes. TrueLean keeps recording your ride with the screen off or the app in the background, so you can put the phone’s display to sleep and still capture the whole ride.

On long rides, the battery saver adapts the screen, sensors, and on-device inference to conserve power. It never reduces recording fidelity — your saved ride stays full-resolution.

Entirely on your device. There are no accounts and no servers — TrueLean never transmits your location, motion, or ride data to us or anyone else. Read the full Privacy Policy.

Open a ride and share it as GPX (with lean and speed) or CSV from the iOS share sheet. Exported data leaves your device only through the destination you choose.

Delete any single ride from its detail view, or remove everything via Settings → Data → Delete All Rides. Deleting the app removes all of its on-device data.

An iPhone with a gyroscope, running iOS 26 or later, and a rigid handlebar/fork mount for your motorcycle.