# Fi Exhaust vs 034SPI

The clearest difference is review sentiment: 034SPI at 55% against Fi Exhaust's 0%. 034SPI also leads on rating (4.2 vs 2.5) and ratings volume (43 vs 2). Fi Exhaust's advantage is iOS requirement (8.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

034SPI holds the better App Store score, 4.2 against 2.5. That said, the two scores are not equally well evidenced: 034SPI has 43 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Fi Exhaust's written reviews are positive against 55% of 034SPI's.

Fi Exhaust ships an update every 2 months, 034SPI every 3 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fi Exhaust | 034SPI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/fi-exhaust/id1179987177/reviews) | **[4.2 (43 ratings)](https://appshunter.io/ios/app/034spi/id6468930588/reviews)** |
| Number of ratings | 2 | **43** |
| Positive reviews | 0.0% of reviews | **55.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 21 MB | 126 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Frequency Intelligent Exhaust Co. LTD](https://appshunter.io/developer/1191737344) | [034Motorsport](https://appshunter.io/developer/1699254218) |

## What reviewers say

### Fi Exhaust

[App page](https://appshunter.io/ios/app/fi-exhaust/id1179987177)

Control your premium automobile's exhaust system with this app. Adjust valve settings, experience different exhaust sounds, and monitor your car's status. Requires a specific OBD2 controller module.

**Highlights:** Wireless valve control (Open/Close), Adjust exhaust sound and velocity, Valvetronic exhaust system function control, Intelligent switch button control (RPM, Speed, Turbo), Monitor car status, Access Fi Exhaust information

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

**In-app purchases:** none


### 034SPI

[App page](https://appshunter.io/ios/app/034spi/id6468930588)

This app allows users to flash their car's ECU/TCU tunes, configure live data displays, and record data logs for analysis. It also provides diagnostic support tools like reading and clearing DTC codes.

**Highlights:** Flash ECU/TCU tunes, Configure live data displays, High-speed data logging, Upload logs to server, Read and clear DTCs, View emissions monitor status

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

**In-app purchases:** none


## Frequently asked questions

### Is Fi Exhaust free?

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

### Is 034SPI free?

034SPI is free to download, with no in-app purchases.

### Which has better reviews, Fi Exhaust or 034SPI?

034SPI is rated higher. Fi Exhaust averages 2.5 out of 5 from 2 ratings, while 034SPI averages 4.2 from 43 ratings.

### Do Fi Exhaust or 034SPI have ads?

Neither Fi Exhaust nor 034SPI shows ads.

### Which is updated more often, Fi Exhaust or 034SPI?

Fi Exhaust ships an update every 2 months, and 034SPI every 3 weeks. Most recently, Fi Exhaust was updated on October 29, 2026 and 034SPI on October 30, 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.*