# Ultra Boost vs Shift Pro

The clearest difference is review sentiment: Ultra Boost at 100% against Shift Pro's 33%. Ultra Boost also leads on ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 24, 2026 and July 10, 2026 respectively.

## The numbers

| Metric | Ultra Boost | Shift Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/ultra-boost/id1471601228/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Ad-supported |
| Size | 81 MB | 29 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ECU=SHOP](https://appshunter.io/developer/1389703440) | [NK RACING PARTS COMPANY LIMITED](https://appshunter.io/developer/1500859331) |

## What reviewers say

### Ultra Boost

[App page](https://appshunter.io/ios/app/ultra-boost/id1471601228)

This application allows users to wirelessly adjust fuel supply and monitor engine performance metrics like RPM, boost, and speed. It offers four operating modes, including an AI mode, to optimize engine output and increase horsepower.

**Highlights:** Wireless fuel supply adjustment, RPM, boost, and speed display, Four operating modes with AI, Monitor oil pressure and air flow, GPS speed and weather data

**Features:** Vision Pro support

**In-app purchases:** none


### Shift Pro

[App page](https://appshunter.io/ios/app/shift-pro-nk-racing/id1596897355)

This application allows users to tune the fuel distribution of injectors. It provides functions to display, configure, and log data, as well as open and save configuration files.

**Highlights:** Display fuel data, Configure fuel data, Open and save files, Data logging

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

**In-app purchases:** none


## Frequently asked questions

### Is Ultra Boost free?

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

### Is Shift Pro free?

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

### Do Ultra Boost or Shift Pro have ads?

Shift Pro shows ads; Ultra Boost does not.

### Which is updated more often, Ultra Boost or Shift Pro?

Ultra Boost ships an update every 2 months, and Shift Pro every 2 months. Most recently, Ultra Boost was updated on August 24, 2026 and Shift Pro on July 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*