# SFO vs UDRY

The clearest difference is update cadence: UDRY at fortnightly against SFO's every 10 months. SFO's advantage is iOS requirement (13.0 vs 15.0). 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.

SFO ships an update every 10 months, UDRY fortnightly. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | SFO | UDRY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Size | 49 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [MMTS ONLINE TECHNOLOGY LIMITED](https://appshunter.io/developer/1582401166) | [UDRY LIMITED](https://appshunter.io/developer/1836985028) |

## What reviewers say

### SFO

[App page](https://appshunter.io/ios/app/sfo/id6739323412)

**Features:** macOS Compatibility

**In-app purchases:** none


### UDRY

[App page](https://appshunter.io/ios/app/udry/id6751819661)

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

**In-app purchases:** none


## Frequently asked questions

### Is SFO free?

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

### Is UDRY free?

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

### Do SFO or UDRY have ads?

Neither SFO nor UDRY shows ads.

### Which is updated more often, SFO or UDRY?

SFO ships an update every 10 months, and UDRY fortnightly. Most recently, SFO was updated on September 9, 2026 and UDRY on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*