RaceChrono Pro vs Spark ECU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RaceChrono Pro
This app serves as a comprehensive lap timer and data logger for motorsports, enabling users to record and analyze performance. It offers video recording with data overlays and supports a wide range of external GPS and OBD-II devices for enhanced accuracy.
- Lap timing with sectors and optimal lap
- Track library with over 2600 pre-made tracks
- Data analysis with synchronized graphs and maps
- Predictive lap timing
- Video recording with data overlay
- Support for external GPS and OBD-II devices
- Unlimited session length
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RaceChrono Pro is a versatile lap timer, data logging and data analysis app designed especially for use in motorsports, replacing your traditional lap timers and data loggers. The RaceChrono Pro app also enables you to record videos and overlay them with the logged data. RaceChrono apps have a strong following, currently over 100000 active users. If you look around at pits during your race or track day, chances are that you’ll see someone using RaceChrono. Even many professionals, such as factory test drivers and race driving instructors, are known to use this app! No matter whether you ride motorbikes, drive go-karts or cars, on closed circuit or special stage tracks – this is the motorsports app for you. RaceChrono Pro has following major features: • Lap timing with sectors and optimal lap • Track library of over 2600 pre-made race tracks • Custom user defined circuit and point-to-point tracks • Smoothly scrolling data analysis with synchronised graph, X/Y graph, map, video and comparison video • Predictive lap timing and time delta graph • Hardware accelerated video export with configurable data overlay • Multiple camera recording and picture-in-picture video export • Video recording using internal camera • Linking and synchronising video files from almost all action cameras • Support for external GPS receivers; Dragy Pro/DRG70/DRG70-C/Lite, RaceBox Mini/Mini S/Micro, Qstarz BL-818GT/BL-1000GT/LT-8000GT, Columbus P-9 Race, Dual XGPS 150/160, VBOX Sport, Garmin GLO • Support for OBD-II readers; OBDLink MX+ Bluetooth, OBDLink CX Bluetooth, Dragy OBD, Vgate vLinker FS, Vgate vLinker/iCar BLE, PLX Kiwi 3/4, Carista OBD2 Bluetooth, Tonwon BLE 1/2/Pro, Veepeak OBDCheck BLE, UniCarScan UCSI-2000, OBDLink MX Wi-Fi, generic Wi-Fi OBD-II • Support for Bluetooth LE heart rate monitors • Unlimited session length, good for 24 hour races • Session data export in .ODS (session summary for Excel), .NMEA, .VBO and .CSV formats
Spark ECU
View live engine data from your vehicle in real-time. Connect your smartphone via Bluetooth to access telemetry, receive diagnostic alerts, and adjust fuel settings. Easily switch between engine maps with an intuitive interface.
- Live engine data telemetry
- Diagnostic fault alerts
- Fuel adjustment settings
- Engine map switching
- Bluetooth connectivity
- Automatic device pairing
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SPARK app gives you a smart, intuitive interface to view all the live data from your engine in real time. Connect your smartphone via Bluetooth to the Taipan and Yarara ECU in two ways: • Via the CAN-BT Module, for instant access to main engine data and real-time telemetry. • Using the XLog, if you want to collect data while driving as well. The app provides you with live dash telemetry, warning and alerts for diagnostic faults and fuel adjustments. Furthermore, with SPARK app you can switch maps just using the scrollbar on your phone. Thanks to the automatic pairing, you just need to connect your device once!
Screenshots
Verdict
The clearest difference is review sentiment: RaceChrono Pro at 58% against Spark ECU's 0%. RaceChrono Pro also leads on rating (4.7 vs 1.0) and update cadence (monthly vs every 7 months). Spark ECU's advantage is price (Free vs $19.99). On ads, in-app purchases 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
Spark ECU is free to download; RaceChrono Pro costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RaceChrono Pro holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: RaceChrono Pro has 184 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 58% of RaceChrono Pro's written reviews are positive against 0% of Spark ECU's.
RaceChrono Pro ships an update monthly, Spark ECU every 7 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | RaceChrono Pro | Spark ECU |
|---|---|---|
| Price | $19.99 | Free — better |
| Rating | 4.7 (184 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 57.6% of reviews — better | 0.0% of reviews |
| Number of ratings | 184 — better | 1 |
| Update frequency | Monthly — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Freemium | Free — better |
| Best chart rank | #11 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 43 MB | 129 MB |
| Age rating | 4+ | 4+ |
| Developer | RaceChrono Oy | AIM tech SRL |
Customer experience
RaceChrono Pro
Spark ECU
In-app purchases
RaceChrono Pro
No in-app purchases
Spark ECU
No in-app purchases









