Lean: Inclinometer
Off-Road Pitch & Roll Meter
About
This utility app transforms your iPhone into a live inclinometer, displaying pitch and roll angles simultaneously for easy reading. It provides customizable warnings with visual and haptic feedback as you approach or exceed set limits. Designed for off-road enthusiasts, it offers a clear, glanceable view of your vehicle's tilt without needing GPS or an internet connection.
What's New in Lean
1.3
July 17, 2026
NEW: Max Roll and Max Pitch — Lean holds your steepest angles for the drive. Plus landscape support, orientation lock, ten color themes, and a redesigned Share card with a scannable QR.
MoreDeveloper apps
FAQ
What is Lean used for?
Lean turns your iPhone into a live inclinometer to measure your vehicle's pitch and roll angles. It's designed for off-road driving to help you understand your vehicle's tilt on slopes and inclines.
How does Lean measure tilt?
Lean uses your iPhone's motion sensors to read gravity and calculate your vehicle's tilt. You simply mount your phone in portrait mode, park on level ground, and tap 'Zero' to set your reference angle.
Does Lean have ads?
No, Lean is completely ad-free. It also does not require GPS, a network connection, or an account, ensuring a private and uninterrupted user experience.
Can I set custom warnings in Lean?
Yes, you can set custom caution and limit angles for both pitch and roll. Lean will alert you with visual cues (amber and red) and haptic feedback as you approach or reach these limits.
What devices does Lean support?
Lean is currently supported on iPhone devices. It is designed to work in any portrait mount, such as on a dashboard, vent, or console charger.
How often is Lean updated?
The latest version of Lean is 1.2, which was last updated on July 1, 2026. Updates typically focus on improving sensor accuracy and user experience based on feedback.
What is the age rating for Lean?
Lean has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain any mature content.
Is Lean accurate for off-roading?
Lean provides an estimate of tilt from your iPhone's motion sensors and serves as an aid. It cannot account for factors like loose surfaces or shifting loads, so it should not replace your own judgment while driving.