TrueLean vs B17 Inclinometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TrueLean
This app measures your motorcycle's lean angle during corners, providing accurate readings through transitions and steady states. It offers a live instrument cluster with speed, distance, and G-force data, and saves your ride history with detailed analysis and route mapping. Export your rides as GPX or CSV files.
- Accurate lean angle measurement
- Live instrument cluster
- Ride history and analysis
- Route mapping with lean markers
- GPX/CSV ride export
- Hands-free start/stop
- Battery optimization
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TrueLean™ measures how far your motorcycle actually leans - the real angle through a corner, not what a bubble level would show. In a steady corner, gravity and cornering force combine to point straight down the bike's own vertical axis, which is exactly why a plain accelerometer reads near zero mid-turn. TrueLean fuses gyroscope attitude with cornering physics, so the number on screen is the lean you're really carrying - accurate through transitions and steady-state alike. One tap zeroes your mount, and it works at any mount angle. A LIVE INSTRUMENT CLUSTER • Big, glanceable lean gauge with zone colors and max-lean markers • Speed, distance, lean, and g-force tiles, plus a ride timer • Portrait or landscape, with an OLED-friendly dark cluster • Keeps recording with the screen off or the app in the background EVERY RIDE, SAVED • Full ride history with personal bests • Route map colored by lean angle, with your deepest-lean markers • Lean and speed timelines, g-forces, and complete stats • 0–60 mph / 0–100 km/h acceleration timing YOURS TO KEEP • Export any ride as GPX (with lean/speed) or CSV from the share sheet • Hands-free start/stop via the Action Button and Siri • Built for long rides: adapts the screen, sensors, and processing to save battery without ever dropping recording fidelity PRIVATE BY DESIGN • No accounts, no ads, no analytics, no third-party SDKs • Your ride data stays on your device and is never sent to us • Nothing leaves your phone unless you choose to export and share it RIDE RESPONSIBLY TrueLean is a recreational tool for reviewing your rides - not a safety device, and its readings are estimates. Mount your phone securely, set up before you move, and never interact with the app while riding. Obey the law, ride within your limits, and save record-chasing for a closed course. Requires an iPhone with a gyroscope. Designed for a rigid handlebar/fork mount.
B17 Inclinometer
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Inclinometer turns your phone into a heel indicator for your sailboat. Mount it in landscape, calibrate in seconds and sail with a clear angle readout, visible from meters away and in full sunlight. HOW IT WORKS The entire screen background is the indicator: blue when you are below your optimal range, green when you are inside it, orange/red when you are over. The huge number shows your heel in degrees, and the app tells you whether you are heeling to port or starboard. FEATURES • Real-time heel from your phone's motion sensors. • Huge, high-contrast number readable from the whole cockpit. • Colors tuned to your optimal range, with stable transitions (no flicker). • Port, starboard or level indication. • Boat profiles: each boat with its own optimal range. • One-tap mount calibration: compensates the bracket angle. • Screen stays awake while measuring. • Works 100% offline. No accounts, no ads, no data collection. BUILT FOR SAILING Nautical-instrument interface: minimal, high contrast, no menus in the way. Mount the phone, calibrate and forget it — just glance at the color. DISCLAIMER This app is a reference tool and does not replace certified navigation instruments. Accuracy may vary depending on the device, the mount and sailing conditions.
Screenshots
Verdict
The clearest difference is in-app purchases: B17 Inclinometer at none against TrueLean's 3. B17 Inclinometer also leads on iOS requirement (16.4 vs 18.0). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. TrueLean sells 3 in-app purchases, starting at $4.99 per month. B17 Inclinometer asks for nothing beyond the download.
| Parameter | TrueLean | B17 Inclinometer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (8 ratings) — better | — |
| Number of ratings | 8 — better | — |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 4 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Zaden Connell | Yon Belausteguigoitia Fierro |
In-app purchases
TrueLean
- Monthly7 Days trial$4.991 Month
- Annual7 Days trial$24.991 Year
- TrueLean Pro Lifetime$79.99
B17 Inclinometer
No in-app purchases









