# UGST vs sienne

UGST and sienne are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

UGST ships an update every 10 months, sienne every 6 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | UGST | sienne |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 months** |
| Size | 18 MB | 71 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [SEOHYEONG OH](https://appshunter.io/developer/1450368638) | [(주)시엔느](https://appshunter.io/developer/1681238902) |

## What reviewers say

### UGST

[App page](https://appshunter.io/ios/app/ugst/id1617763607)

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

**In-app purchases:** none


### sienne

[App page](https://appshunter.io/ios/app/sienne/id6447422202)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is UGST free?

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

### Is sienne free?

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

### Do UGST or sienne have ads?

Neither UGST nor sienne shows ads.

### Which is updated more often, UGST or sienne?

UGST ships an update every 10 months, and sienne every 6 months. Most recently, UGST was updated on October 14, 2026 and sienne on October 9, 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.*