# Spark ECU vs RallySplit

The clearest difference is in-app purchases: Spark ECU at none against RallySplit's 1. RallySplit's advantage is update cadence (every 3 days vs every 7 months) and iOS requirement (16.6 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. RallySplit sells 1 one-off in-app purchase. Spark ECU asks for nothing beyond the download.

Spark ECU ships an update every 7 months, RallySplit every 3 days. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Spark ECU | RallySplit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/spark-ecu/id6453165199/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 129 MB | 1 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AIM tech SRL](https://appshunter.io/developer/1187892995) | [Giacomo Marchioro](https://appshunter.io/developer/6790792565) |

## What reviewers say

### 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


### RallySplit

[App page](https://appshunter.io/ios/app/rallysplit/id6790792563)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RallySplitUNLIMITED | $39.99 | one-time |


## Frequently asked questions

### Is Spark ECU free?

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

### Is RallySplit free?

RallySplit is free to download, with in-app purchases available.

### Do Spark ECU or RallySplit have ads?

Neither Spark ECU nor RallySplit shows ads.

### Which is updated more often, Spark ECU or RallySplit?

Spark ECU ships an update every 7 months, and RallySplit every 3 days. Most recently, Spark ECU was updated on October 3, 2026 and RallySplit on October 2, 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.*