# SIUI PIE vs Flyinsono

The clearest difference is update cadence: Flyinsono at every 5 weeks against SIUI PIE's every 13 months. SIUI PIE's advantage is iOS requirement (9.0 vs 12.2). 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.

SIUI PIE ships an update every 13 months, Flyinsono every 5 weeks. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SIUI PIE | Flyinsono |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 weeks** |
| Size | 3 MB | 155 MB |
| Requires iOS | **9.0** | 12.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Shantou Institute of Ultrasonic Inst. Co., Ltd.](https://appshunter.io/developer/406261738) | [VINNO Technology (Suzhou) Co., Ltd](https://appshunter.io/developer/1455825864) |

## What reviewers say

### SIUI PIE

[App page](https://appshunter.io/ios/app/siui-pie-3/id434341652)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flyinsono

[App page](https://appshunter.io/ios/app/flyinsono/id1501133381)

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

**In-app purchases:** none


## Frequently asked questions

### Is SIUI PIE free?

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

### Is Flyinsono free?

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

### Do SIUI PIE or Flyinsono have ads?

Neither SIUI PIE nor Flyinsono shows ads.

### Which is updated more often, SIUI PIE or Flyinsono?

SIUI PIE ships an update every 13 months, and Flyinsono every 5 weeks. Most recently, SIUI PIE was updated on October 26, 2026 and Flyinsono on November 3, 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.*