# RaceChrono Pro vs Spark ECU

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.

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.

## The numbers

| Metric | RaceChrono Pro | Spark ECU |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[4.7 (184 ratings)](https://appshunter.io/ios/app/racechrono-pro/id1129429340/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/spark-ecu/id6453165199/reviews) |
| Number of ratings | **184** | 1 |
| Positive reviews | **57.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Freemium | **Free** |
| Best chart rank | **#11** | — |
| Size | 43 MB | 129 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RaceChrono Oy](https://appshunter.io/developer/1056547888) | [AIM tech SRL](https://appshunter.io/developer/1187892995) |

## What reviewers say

### RaceChrono Pro

[App page](https://appshunter.io/ios/app/racechrono-pro/id1129429340)

**Currently charting:** #11 Top Paid · Sports (US App Store)

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.

**Highlights:** 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

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none


### Spark ECU

[App page](https://appshunter.io/ios/app/spark-ecu/id6453165199)

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.

**Highlights:** Live engine data telemetry, Diagnostic fault alerts, Fuel adjustment settings, Engine map switching, Bluetooth connectivity, Automatic device pairing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RaceChrono Pro free?

RaceChrono Pro costs $19.99, with no in-app purchases.

### Is Spark ECU free?

Spark ECU is free to download, with no in-app purchases.

### Which has better reviews, RaceChrono Pro or Spark ECU?

RaceChrono Pro is rated higher. RaceChrono Pro averages 4.7 out of 5 from 184 ratings, while Spark ECU averages 1.0 from 1 ratings.

### Do RaceChrono Pro or Spark ECU have ads?

Neither RaceChrono Pro nor Spark ECU shows ads.

### Which is updated more often, RaceChrono Pro or Spark ECU?

RaceChrono Pro ships an update monthly, and Spark ECU every 7 months. Most recently, RaceChrono Pro was updated on November 6, 2026 and Spark ECU on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*