# iTSX vs POWER TUNER App

The clearest difference is rating: POWER TUNER App at 3.2 against iTSX's 2.3. iTSX's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 16.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

POWER TUNER App holds the better App Store score, 3.2 against 2.3. Both are backed by a comparable volume of ratings — 45 and 82 respectively. Written reviews point the same way: 24% of iTSX's written reviews are positive against 27% of POWER TUNER App's.

iTSX ships an update every 2 months, POWER TUNER App every 3 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iTSX | POWER TUNER App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (45 ratings)](https://appshunter.io/ios/app/itsx/id461100848/reviews) | **[3.2 (82 ratings)](https://appshunter.io/ios/app/power-tuner-app/id1235945328/reviews)** |
| Number of ratings | 45 | **82** |
| Positive reviews | 24.5% of reviews | **26.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 35 MB | 14 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SCT Performance](https://appshunter.io/developer/461100851) | [Yamaha Motor Co., Ltd.](https://appshunter.io/developer/337268490) |

## What reviewers say

### iTSX

[App page](https://appshunter.io/ios/app/itsx/id461100848)

Tune and monitor your vehicle's performance using your iPhone or iPad. This app requires a specific wireless OBD-II interface to adjust engine parameters, view real-time data, and run performance tests. It also allows for reading and clearing diagnostic trouble codes.

**Highlights:** Vehicle programming for performance gains, Pre-loaded dyno-proven tunes, Adjustable speed limiter, Virtual gauges and data monitoring, Record and review data logs, Performance tests (0-60, 1/4 mile), Read and clear diagnostic trouble codes

**In-app purchases:** none


### POWER TUNER App

[App page](https://appshunter.io/ios/app/power-tuner-app/id1235945328)

Optimize your Yamaha motorcycle's performance for racing. Adjust engine and suspension settings, monitor real-time machine data, and track lap times. Features include mapping, traction control, launch control, and an ECU lock for theft deterrence.

**Highlights:** Engine and suspension tuning, Real-time machine data monitoring, Lap time tracking, Traction and launch control, ECU lock for theft deterrence, Setup guide

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use for tuning
- 💡 Comprehensive maintenance log
- 🚀 FI/IG tuning is amazing
- 👍 App is great when it works
- 👍 Adjustability is amazing

**What reviewers complain about**

- 🐛 Freezing/crashing in menus
- 🐛 Connectivity issues
- 🐛 App not working with iOS 14
- 🐛 ECU lock greyed out
- 🐛 No power tuning for WR450F

**Reported bugs**

- FI/IG tuning menu freezes
- ECU lock greyed out and shows error message
- App freezes when accessing maps sub menu
- Mapping edit screen is unresponsive
- Cannot connect to WiFi/bike after 120 hours

**Requested features**

- Add Russian language support
- Add Portuguese language support
- Add Spanish language support
- Add French language support
- Add Chinese language support


## Frequently asked questions

### Is iTSX free?

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

### Is POWER TUNER App free?

POWER TUNER App is free to download, with no in-app purchases.

### Which has better reviews, iTSX or POWER TUNER App?

POWER TUNER App is rated higher. iTSX averages 2.3 out of 5 from 45 ratings, while POWER TUNER App averages 3.2 from 82 ratings.

### Do iTSX or POWER TUNER App have ads?

Neither iTSX nor POWER TUNER App shows ads.

### Which is updated more often, iTSX or POWER TUNER App?

iTSX ships an update every 2 months, and POWER TUNER App every 3 months. Most recently, iTSX was updated on October 21, 2026 and POWER TUNER App on October 24, 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.*