# Ultra Boost Piezo vs AppAirTools

The clearest difference is in-app purchases: Ultra Boost Piezo at none against AppAirTools's 1. Ultra Boost Piezo also leads on iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. AppAirTools sells 1 in-app purchase, starting at $0.99 per month. Ultra Boost Piezo asks for nothing beyond the download.

Ultra Boost Piezo ships an update fortnightly, AppAirTools every 9 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ultra Boost Piezo | AppAirTools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/ultra-boost-piezo/id1579264665/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Free | — |
| Size | 80 MB | 68 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ECU=SHOP](https://appshunter.io/developer/1389703440) | [wanchai khwunkhum](https://appshunter.io/developer/6807079696) |

## What reviewers say

### Ultra Boost Piezo

[App page](https://appshunter.io/ios/app/ultra-boost-piezo/id1579264665)

This application allows users to wirelessly adjust fuel supply and monitor engine performance metrics like RPM, boost, and speed via a mobile phone. It features an AI mode for automatic operation adjustments and offers a tangible price point for increased horsepower.

**Highlights:** Wireless fuel adjustment, RPM and boost display, AI automatic operation mode, Monitor oil pressure, GPS speed display, Weather and air pressure data

**Features:** macOS Compatibility

**In-app purchases:** none


### AppAirTools

[App page](https://appshunter.io/ios/app/appairtools/id6807079694)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| สมาชิกรายเดือน | $0.99 | per month |


## Frequently asked questions

### Is Ultra Boost Piezo free?

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

### Is AppAirTools free?

AppAirTools is free to download, with in-app purchases available.

### Do Ultra Boost Piezo or AppAirTools have ads?

Neither Ultra Boost Piezo nor AppAirTools shows ads.

### Which is updated more often, Ultra Boost Piezo or AppAirTools?

Ultra Boost Piezo ships an update fortnightly, and AppAirTools every 9 days. Most recently, Ultra Boost Piezo was updated on October 20, 2026 and AppAirTools 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.*