Purple Sector
Motorcycle lap timers and data loggers compared
SpeedAngle APEX, Starlane Stealth-5, AiM Solo 2, RaceBox Mini S and phone apps for track days: GPS rate, lean angle, software, prices and getting data off.
For track days, the dedicated bike units are the SpeedAngle APEX and Starlane Stealth-5, both with 10 Hz GPS and lean angle built in. The AiM Solo 2 records 25 Hz GPS and AiM sells bike mounting kits for it. A RaceBox Mini S or a phone app such as RaceChrono or Harry’s LapTimer costs less and shows lean angle from motion sensors.
Purple Sector doesn’t make lap timers. It opens files from several of them. Purple Sector has no commercial relationship with any brand on this page.
How do they compare?
Specs and prices checked 23 October 2026. A dash means not stated by the vendor.
| SpeedAngle APEX | Starlane Stealth-5 | AiM Solo 2 / Solo 2 DL | RaceBox Mini S | Phone app | |
|---|---|---|---|---|---|
| Made for | Motorcycles | Motorcycles | Cars and bikes; AiM sells sports-bike and motocross kits | Not bike-specific; its FAQ covers motorcycles | Cars, bikes, karts |
| GPS rate | 10 Hz | 10 Hz, three constellations | 25 Hz, four constellations | 25 Hz | Phone GPS, or an external receiver up to 25 Hz |
| Lean angle | Real time, up to 69° each way, logged 20 times a second | Lean angle indication, on by default, with no sensors fitted to the bike | AiM names no lean channel; its 6-axis inertial platform can calculate roll | Lean angle analysis in the RaceBox app | RaceChrono: from the phone’s or a RaceBox’s motion sensors, phone in a holder. Harry’s: all editions, with a motorbike selected |
| Screen | 256×128 LCD | – | 238×99 graphical | None: uses the phone | The phone |
| Getting data off | USB 2.0 | Starlane’s MAAT software | Wi-Fi to Race Studio 3 | Bluetooth, or export VBO or CSV from racebox.pro | Export from the app |
| Software | R4 Replay and Analysis, free, Windows | MAAT for Windows and Mac; MAAT Mobile for Android and iOS | Race Studio 3, free, 64-bit Windows | RaceBox app: iOS, Android, Apple silicon Mac | The app itself |
| Price (as of 23 Oct 2026) | US$499 (SpeedAngle); $699 at NZ dealer CMG Motorcycles | No price published; none found in AU or NZ | Solo 2 A$769.95, Solo 2 DL A$1,340 incl. tax (AU dealers) | US$289 on sale, US$319 normally (RaceBox says valid for Australia) | RaceChrono Pro A$29.99 (iOS); Harry’s A$14.99 to A$44.99 |
| Opens in Purple Sector | Yes, the .sa file as recorded | Not yet: MAAT’s session and .SCS files don’t open | Yes, .xrk / .xrz as recorded | Yes: VBO, CSV, or Bluetooth in Chrome or Edge | RaceChrono Pro and Harry’s exports, yes |
SpeedAngle APEX10 Hz
- Made for
- Motorcycles
- GPS rate
- 10 Hz
- Lean angle
- Real time, up to 69° each way, logged 20 times a second
- Screen
- 256×128 LCD
- Getting data off
- USB 2.0
- Software
- R4 Replay and Analysis, free, Windows
- Price (as of 23 Oct 2026)
- US$499 (SpeedAngle); $699 at NZ dealer CMG Motorcycles
- Opens in Purple Sector
- Yes, the
.safile as recorded
Starlane Stealth-510 Hz, three constellations
- Made for
- Motorcycles
- GPS rate
- 10 Hz, three constellations
- Lean angle
- Lean angle indication, on by default, with no sensors fitted to the bike
- Screen
- –
- Getting data off
- Starlane’s MAAT software
- Software
- MAAT for Windows and Mac; MAAT Mobile for Android and iOS
- Price (as of 23 Oct 2026)
- No price published; none found in AU or NZ
- Opens in Purple Sector
- Not yet: MAAT’s session and
.SCSfiles don’t open
AiM Solo 2 / Solo 2 DL25 Hz, four constellations
- Made for
- Cars and bikes; AiM sells sports-bike and motocross kits
- GPS rate
- 25 Hz, four constellations
- Lean angle
- AiM names no lean channel; its 6-axis inertial platform can calculate roll
- Screen
- 238×99 graphical
- Getting data off
- Wi-Fi to Race Studio 3
- Software
- Race Studio 3, free, 64-bit Windows
- Price (as of 23 Oct 2026)
- Solo 2 A$769.95, Solo 2 DL A$1,340 incl. tax (AU dealers)
- Opens in Purple Sector
- Yes,
.xrk/.xrzas recorded
RaceBox Mini S25 Hz
- Made for
- Not bike-specific; its FAQ covers motorcycles
- GPS rate
- 25 Hz
- Lean angle
- Lean angle analysis in the RaceBox app
- Screen
- None: uses the phone
- Getting data off
- Bluetooth, or export VBO or CSV from racebox.pro
- Software
- RaceBox app: iOS, Android, Apple silicon Mac
- Price (as of 23 Oct 2026)
- US$289 on sale, US$319 normally (RaceBox says valid for Australia)
- Opens in Purple Sector
- Yes: VBO, CSV, or Bluetooth in Chrome or Edge
Phone appPhone GPS, or an external receiver up to 25 Hz
- Made for
- Cars, bikes, karts
- GPS rate
- Phone GPS, or an external receiver up to 25 Hz
- Lean angle
- RaceChrono: from the phone’s or a RaceBox’s motion sensors, phone in a holder. Harry’s: all editions, with a motorbike selected
- Screen
- The phone
- Getting data off
- Export from the app
- Software
- The app itself
- Price (as of 23 Oct 2026)
- RaceChrono Pro A$29.99 (iOS); Harry’s A$14.99 to A$44.99
- Opens in Purple Sector
- RaceChrono Pro and Harry’s exports, yes
Which one suits me?
- You want a bike unit with lean angle built in and no phone: SpeedAngle APEX or Starlane Stealth-5, both made for motorcycles.
- You want the highest GPS rate and a logger you can also use in a car: AiM Solo 2. The Solo 2 DL adds ECU data over CAN, RS232 or K-Line.
- You’re starting out: a RaceBox Mini S with its free app, or RaceChrono Pro or Harry’s LapTimer on your phone, cost less. In RaceChrono, a phone using its own motion sensors needs to stay in a holder for the whole session.
- You analyse on a Mac: SpeedAngle’s R4 and AiM’s Race Studio 3 are Windows programs; Starlane’s MAAT has a Mac version; RaceBox’s app runs on Apple silicon Macs.
How is lean angle measured?
Lean angle is calculated. Units use motion sensors (accelerometers and gyros), and some apps can also estimate it from the GPS path alone: RaceChrono offers a GPS lean angle channel when no motion data is available. A bike in a steady corner leans so that gravity and the cornering force balance, which is why lean angle and lateral g rise and fall together.
When Purple Sector opens a file with a lean channel (SpeedAngle writes one in every row; other loggers call it Lean, Roll or Bank), it checks the readings against the GPS path before charting them as lean angle. The AI coach doesn’t use lean angle yet; it’s charted like any other channel.
What can a GPS lap timer tell a rider?
A GPS lap timer records lap and sector times, your speed through every corner and your line. Lean angle adds how far you leaned at each point. A GPS lap timer records position and speed, not your brake lever or throttle. See what GPS data can and cannot tell you and track day telemetry for beginners.
Questions
What is the best lap timer for motorcycle track days?
The SpeedAngle APEX and Starlane Stealth-5 are bike units with lean angle built in, at 10 Hz. The AiM Solo 2 records 25 Hz GPS and has bike kits. A RaceBox Mini S or a phone app costs less.
Which motorcycle lap timers show lean angle?
The SpeedAngle APEX (up to 69° each way), the Starlane Stealth-5, the RaceBox app with a RaceBox, RaceChrono and Harry’s LapTimer. AiM doesn’t name a lean channel for the Solo 2.
Can I use my phone as a motorcycle lap timer?
Yes. RaceChrono and Harry’s LapTimer time laps and show lean angle, with the phone fixed in a holder. An external receiver such as a RaceBox records GPS at up to 25 Hz.
Can I use a Garmin Catalyst on a motorcycle?
Garmin lists the Catalyst 2 as an automotive product, and its manual covers windscreen mounting and car audio pairing. It doesn’t describe a motorcycle installation.
How much is a SpeedAngle in Australia?
SpeedAngle sells the APEX direct for US$499, and an NZ dealer, CMG Motorcycles, lists it at $699. We didn’t find an Australian retailer price.
More: Lap timer apps compared · Garmin Catalyst vs RaceBox vs AiM Solo 2 · AiM Solo 2 software and apps · RaceBox data export · RaceChrono export · Harry’s LapTimer export · Which file to bring · Track maps, motorcycle circuits included
Sources, checked 23 October 2026
- SpeedAngle APEX: lap timer with lean angle; 10 Hz GPS; lean up to 69°; lean and G logged 20 times a second; 256×128 LCD; USB 2.0: speedangle.com
- SpeedAngle R4 Replay and Analysis: free, Windows: speedangle.com/download
- SpeedAngle APEX US$499: speedangle.com/shop
- SpeedAngle APEX $699 at CMG Motorcycles, New Zealand: store.cmgmotorcycles.co.nz/products/speedangle-data-logger-lap-timer-w
- Starlane Stealth-5: three-constellation 10 Hz GPS; lean angle indication on by default; no sensors fitted to the vehicle; for motorcycles; MAAT for Windows and Mac, MAAT Mobile for Android and iOS; no published price: starlane.com/en/products/stealth-gps-lap-timer
- AiM Solo 2: kits for sports bikes and motocross; 25 Hz four-constellation GPS; 6-axis inertial platform that can calculate roll; no lean channel named: aim-sportline.com/en/products/solo2-solo2dl/index.htm
- Solo 2: 238×99 display; Wi-Fi download; Race Studio 3 free: store.aim-sportline.com/en/lap-timers/23-solo-2.html
- Race Studio 3 on 64-bit Windows: aim-sportline.com/en/sw-os-compatibility-table.htm
- Solo 2 DL adds ECU data over CAN, RS232 or K-Line: store.aim-sportline.com/en/lap-timers/37-solo-2-dl.html
- Solo 2 A$769.95 at an Australian dealer: superbikesupply.com.au/products/aim-solo-2-gps-lap-timer
- Solo 2 DL A$1,340 incl. tax at an Australian dealer: tasautosport.com.au/products/solo-2-dl-gps-lap-timer
- RaceBox Mini S: 25 Hz; US$289 on sale, US$319 normally, valid for Australia; bike lean angle in the app: racebox.pro/products/racebox-mini-s
- RaceBox on motorcycles, measuring lean angles; app lean angle analysis: racebox.pro/info/faq
- RaceBox app on iOS and Android: racebox.pro/products/mobile-app
- RaceBox app on Apple silicon Macs: apps.apple.com/au/app/id1521988789
- RaceBox exports VBO and CSV from its website: racebox.pro/info/session-export
- RaceChrono lean angle from the phone’s or a RaceBox’s motion sensors, phone in a holder for the whole session; GPS lean angle channel: racechrono.com/?p=352
- External receivers up to 25 Hz in RaceChrono (RaceBox): racechrono.com/?p=1492
- RaceChrono Pro A$29.99 on iOS: apps.apple.com/au/app/racechrono-pro/id1129429340
- Harry’s LapTimer: every edition records lean angle with a motorbike selected (developer, 2023): forum.gps-laptimer.de/viewtopic.php?t=6449
- Harry’s LapTimer A$14.99 to A$44.99: purplesector.dev/guides/lap-timer-apps-compared
- Garmin Catalyst 2 listed under automotive: garmin.com/en-AU/p/1917956
- Catalyst 2 manual: windscreen mounting, car audio pairing: www8.garmin.com/manuals/webhelp/GUID-9592B201-210B-4F3A-9081-7F876CC81
- Purple Sector opens SpeedAngle .sa, AiM .xrk/.xrz, RaceBox VBO/CSV and Bluetooth, RaceChrono and Harry’s exports; Starlane files not yet: purplesector.dev/llms.txt
- Purple Sector checks a lean channel against the GPS path before charting it as lean angle; the AI coach does not use it yet: purplesector.dev/analyse