RaceChrono, Harry's LapTimer and TrackAddict are three lap-timer apps worth comparing for motorcycle track days. Start with the phone you own, the data you want to review and any external GPS receiver you already use. The most suitable app is the one that can record your session reliably and let you use the result afterwards.
This is a comparison of published features, checked on 3 November 2026, rather than a claim of hands-on testing. Editions, compatibility and prices can change. Check your local app store and the developer's current documentation before buying an app or receiver.
Quick comparison: which app should you investigate first?
| App | Platforms, editions and starting point |
|---|---|
| RaceChrono | Android base app; Pro on Android and iOS. Consider Pro for data exports and video. |
| Harry's LapTimer | iOS and Android. Paid Rookie, Petrolhead and GrandPrix editions cover different video and sensor needs. |
| TrackAddict | iOS and Android. Free entry with different paid upgrades on each platform; a starting point for recording and lap review. |
All three offer external-GPS options, but that doesn't mean every receiver works with every edition or operating system. Confirm the combination, including model and connection method, before spending money.
RaceChrono: check whether you need the Pro features
RaceChrono's official feature matrix separates the Android base app from Pro on Android and iOS. The matrix lists lap timing, sector timing, maps and graphs in the base version. Pro adds features including predictive timing, video functions and session exports such as CSV and VBO. External GPS support is listed across those editions.
If your plan includes taking session files into another analysis tool, pay attention to that export distinction. Being able to inspect data inside the app does not mean the edition you downloaded can export the file you need.
Before choosing Pro, write down the extra capability you want. Is it video review, a particular export or another listed feature? That gives you something concrete to test after purchase. Don't pay for a feature simply because you expect it might become useful later.
For receiver setup and platform-specific questions, use RaceChrono's support resources. Match the instructions to your phone and hardware rather than following an old screenshot from another platform.
Harry's LapTimer: choose the edition deliberately
Harry's official product comparison describes Rookie as the starting edition for lap timing and data recording. Petrolhead adds video recording and overlays, while GrandPrix adds further video and sensor capabilities. The developer lists its LapTimer editions for both iOS and Android.
For a motorcycle rider, that makes the edition choice part of the equipment choice. Check the tier needed for a receiver or video workflow before you buy it. Confirm any platform-specific camera feature too; a feature listed for one device family should not be assumed to work on another.
The product page also lists Harry's GPS/OBD Buddy as a technology demonstration, not a lap-timing replacement. If you download it to investigate sensors, remember that it isn't the same product as a LapTimer edition.
Avoid converting a price from the developer's US price list into an assumed UK cost. Use the price and upgrade terms shown in your own app store.
TrackAddict: distinguish the iOS and Android offers
HP Tuners describes TrackAddict as offering circuit lap timing, data logging, video, lap comparison and external-GPS support. Its iOS free edition is limited to storing three recordings and excludes live telemetry; the Pro option removes those stated limits. Android has its own upgrade options, so don't carry the iOS limits or entitlements across without checking.
If you want to try it, start with a simple recording and inspect the result before planning a full day around it. Verify the functions that matter to you in the edition and platform you actually installed.
HP Tuners' external-device guidance is also worth checking before buying a GPS receiver. Its documentation distinguishes supported devices and connection arrangements. Treat hardware compatibility as a specific pairing, not a general promise that Bluetooth equipment will work.
Can a phone replace a dedicated motorcycle lap timer?
Possibly, but decide which job you need it to do. Recording a session for evening review, displaying a lap time on track and capturing a synchronised video are different requirements. A setup that is convenient for one may be awkward for another.
Write a short requirements list before comparing products:
- Do I only need a session record, or do I want an on-bike display?
- Will I review on the phone, a computer or another service?
- Do I need video, and which camera will supply it?
- Which files must I be able to export?
- How will I mount, power and operate the equipment under the organiser's rules?
If a dedicated unit is still under consideration, our RaceBox and AiM comparison introduces that equipment category. Check the current manufacturer specifications before making a purchase.
Internal GPS versus an external receiver
Compare the complete recording chain rather than buying on a frequency number alone. Check that your intended app accepts the receiver, that the phone can maintain the connection and that you know how to verify which location source is active.
A higher stated update rate is not, by itself, a guarantee that your resulting lap times or racing lines will have a particular accuracy. Reception, setup and the processing used by the system matter too. Don't turn an advertised frequency into a promise of centimetre positioning or millisecond timing.
A practical buying rule is to resolve an observed limitation. If the current recording has missing sections or inconsistent positioning, investigate the setup and documentation first. Then consider whether a supported receiver addresses that problem. Keep a short sample recording so you can compare before and after.
Check the export before trusting a workflow
An app's export menu is only one side of compatibility. The receiving software also needs to understand the file's format and available channels. Two files ending in CSV can have different columns, units and structures.
Use this small acceptance check before a track day:
- Make a lawful test recording away from the circuit, without interacting with the device while riding or driving.
- Export it using the edition you plan to use on the day.
- Keep the original file unchanged as a backup.
- Open it in the software where you intend to review sessions.
- Confirm the expected time, position and speed information is present.
That checks the file workflow, not circuit lap-timing accuracy. If the test recording doesn't contain laps, don't expect it to validate lap detection.
To test an existing track session with ApexIngest, use the supported-file import demo. Check its accepted formats for your recording; this comparison doesn't imply that every export from each app is supported.
Prepare the phone before the pit-lane queue
Run through setup at home: charge the devices, check storage, review the app's required permissions, connect the intended receiver and find the start and stop controls. Confirm the mounting arrangement with your organiser. Don't make on-track phone interaction part of the plan.
For video, decide how you will identify the matching session afterwards. A note with the session number and camera clip saves a lot of evening guesswork. If the equipment fails, have a simple fallback: ride the session without it and ask for instructor feedback.
Choose for the review you will actually do
For a first day, start with the smallest setup that meets your recording goal. For regular analysis, prioritise access to usable files. For video coaching, check the specific camera and edition features rather than choosing on the app name alone.
After recording, inspect a few clear laps and one corner before studying every channel. Our beginner's telemetry guide explains where to begin. An app is doing its job when it leaves you with usable evidence and a clearer question for the next session.