Fi EXHAUST Pro vs 034SPI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fi EXHAUST Pro
Control and customize your car's exhaust valve system with this app. Adjust valve settings based on RPM, speed, or turbo boost, or manually control them. It also offers a one-click function to clear diagnostic trouble codes from your car's ECU.
- Bluetooth exhaust valve control
- Automatic valve modes (RPM, Speed, Turbo)
- Manual valve operation
- Customizable remote buttons
- One-click ECU diagnostic code removal
- Smart interface remembers settings
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Fi EXHAUST Pro App is developed for Frequency Intelligent Exhaust high performance valvetronic exhaust systems. The App allows users to control and customize exhaust valve switch using Bluetooth. Special Features More detailed customization features 1. Choose between Engine RPM, Speed or Turbo Boost to automatically open and close the valve/s. Automatic valve mode preferences can be set based on driving habits or special circumstances. 2. Open and close the exhaust valve/s manually. 3. Set default valve mode on engine start up. 4. Customize what 2 buttons on the physical remote do. High-accuracy and reliable debugging function Because the Fi EXHAUST Pro App is paired with an Fi Pro Version, it can help detect and remove diagnostic trouble codes from the car’s Engine Control Unit (ECU) like check engine light (CEL) with a one-click bug removal function. Smart and intuitive interface We look forward to Fi EXHAUST Pro App becoming your best partner on your aftermarket modification journey. The app intelligently remembers your settings, automatically connects to the Bluetooth control box after first time pairing and interactive interface design is joy to use. Every time the App launches it’s like a pleasant conversation between Fi EXHAUST and your car.
034SPI
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.
- Flash ECU/TCU tunes
- Configure live data displays
- High-speed data logging
- Upload logs to server
- Read and clear DTCs
- View emissions monitor status
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Designed for use on iPhone/iOS as well as Apple Silicon-equipped laptops (M1, M2, M3), 034SPI allows you to easily flash your car, change fuel maps, configure live data displays, record and submit data logs to 034Motorsport's Tuning Support team, and utilize diagnostic support tools such as DTC/CEL code read/clear and more! Available now for use with any Dynamic+ ECU or TCU tune and the latest Dynamic+ End User Flashing Dongle (May 2023 & Newer)! Full App Features: Complete Any ECU Or TCU Tune flash Quickly Flash Different Fuel Octane Or Transmission Files Flash ECU/TCU Using Mobile Device's Internet Connection Enhanced Flashing Protocol Protections For Increased Flashing Stability User-Configurable Live Data Displays Dozens Of Defined Variables Available Multiple Display Types Available for Live Dt High-Speed Data Logging Of Pre-Defined Variables Easy Upload Of Logs To 034Motorsport Server Data Log Analysis Services Available Free Of Charge Read & Clear DTCs On ECU & TCU View Emissions Monitor Statuses Perform Adaptations/Recalibrations* Throttle Body Adaptation Fuel Tank Drain *Available for limited platforms, coverage expanding regularly
Screenshots
Verdict
The clearest difference is rating: 034SPI at 4.2 against Fi EXHAUST Pro's 3.7. 034SPI also leads on ratings volume (43 vs 3). Fi EXHAUST Pro's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 3.7. That said, the two scores are not equally well evidenced: 034SPI has 43 ratings behind it against 3, so its average is the more settled of the two.
Fi EXHAUST Pro ships an update monthly, 034SPI every 2 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | Fi EXHAUST Pro | 034SPI |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.2 (43 ratings) — better |
| Positive reviews | — | 55.0% of reviews |
| Number of ratings | 3 | 43 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 39 MB | 126 MB |
| Age rating | 4+ | 4+ |
| Developer | Frequency Intelligent Exhaust Co. LTD | 034Motorsport |
Customer experience
Fi EXHAUST Pro
034SPI
In-app purchases
Fi EXHAUST Pro
No in-app purchases
034SPI
No in-app purchases
