# SONO USG vs sunbright US

The clearest difference is update cadence: SONO USG at every 3 weeks against sunbright US's every 6 months. 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.

SONO USG ships an update every 3 weeks, sunbright US every 6 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | SONO USG | sunbright US |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Size | 276 MB | 63 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [Leltek](https://appshunter.io/developer/1329395835) | [Shanghai Sunbright Industrial Co.,Ltd](https://appshunter.io/developer/1749930927) |

## What reviewers say

### SONO USG

[App page](https://appshunter.io/ios/app/sono-usg/id1671961635)

**Features:** macOS Compatibility

**In-app purchases:** none


### sunbright US

[App page](https://appshunter.io/ios/app/sunbright-us/id6532601807)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SONO USG free?

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

### Is sunbright US free?

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

### Do SONO USG or sunbright US have ads?

Neither SONO USG nor sunbright US shows ads.

### Which is updated more often, SONO USG or sunbright US?

SONO USG ships an update every 3 weeks, and sunbright US every 6 months. Most recently, SONO USG was updated on October 25, 2026 and sunbright US on October 27, 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.*