# RFECU Performance 2.0 vs KOSO

The clearest difference is price: KOSO at Free against RFECU Performance 2.0's $26.99. KOSO also leads on update cadence (every 2 weeks vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

KOSO is free to download; RFECU Performance 2.0 costs $26.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RFECU Performance 2.0 ships an update every 6 weeks, KOSO every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RFECU Performance 2.0 | KOSO |
| --- | --- | --- |
| Price | $26.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/koso-k-link/id1601702100/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Size | 14 MB | 210 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Release Force Limited Company](https://appshunter.io/developer/1326034139) | [Tong Yah Electronic Technology Co., Ltd.](https://appshunter.io/developer/1050103913) |

## What reviewers say

### RFECU Performance 2.0

[App page](https://appshunter.io/ios/app/rfecu-performance-20/id1456714022)

Connects to your motorcycle's engine computer via Bluetooth to adjust fuel injection, ignition timing, and O2 sensor range. Offers quick mode switching, displays and clears diagnostic trouble codes, and provides real-time engine parameter monitoring with historical data analysis.

**Highlights:** Bluetooth engine connection, Fuel injection adjustment, Ignition timing control, O2 sensor range settings, Quick mode switching, Diagnostic trouble code display and clearing, Real-time engine parameter monitoring, Historical data analysis

**In-app purchases:** none


### KOSO

[App page](https://appshunter.io/ios/app/koso-k-link/id1601702100)

Connect to KOSO meters via Bluetooth to fetch trip data, receive maintenance notifications, and view vehicle diagnostics. It also provides weather forecasts, gas prices, and navigation features, with optional synchronized display on compatible vehicle dashboards.

**Highlights:** Bluetooth connectivity to KOSO meters, Trip record storage, Fuel and maintenance notifications, Vehicle diagnosis, Weather forecast and gas price information, Navigation and routing, Virtual dashboard with real-time OBD data

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RFECU Performance 2.0 free?

RFECU Performance 2.0 costs $26.99, with no in-app purchases.

### Is KOSO free?

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

### Do RFECU Performance 2.0 or KOSO have ads?

Neither RFECU Performance 2.0 nor KOSO shows ads.

### Which is updated more often, RFECU Performance 2.0 or KOSO?

RFECU Performance 2.0 ships an update every 6 weeks, and KOSO every 2 weeks. Most recently, RFECU Performance 2.0 was updated on November 2, 2026 and KOSO 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.*