# SmartSynX vs Ultra Boost Piezo

The clearest difference is update cadence: Ultra Boost Piezo at fortnightly against SmartSynX's every 6 weeks. On price, ads, 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.

SmartSynX ships an update every 6 weeks, Ultra Boost Piezo fortnightly. The most recent releases landed on September 13, 2026 and June 6, 2026 respectively.

## The numbers

| Metric | SmartSynX | Ultra Boost Piezo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.3 (3 ratings)](https://appshunter.io/ios/app/ultra-boost-piezo/id1579264665/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 28 MB | 80 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BLUESEAS ENTERPRISE COMPANY LIMITED](https://appshunter.io/developer/1310380548) | [ECU SHOP 1 COMPANY LIMITED](https://appshunter.io/developer/1389703440) |

## What reviewers say

### SmartSynX

[App page](https://appshunter.io/ios/app/smartsynx/id1449200976)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SmartSynX free?

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

### Is Ultra Boost Piezo free?

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

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

Neither SmartSynX nor Ultra Boost Piezo shows ads.

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

SmartSynX ships an update every 6 weeks, and Ultra Boost Piezo fortnightly. Most recently, SmartSynX was updated on September 13, 2026 and Ultra Boost Piezo on June 6, 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.*