# S.F.F.J vs USEK Official

The clearest difference is update cadence: USEK Official at every 4 days against S.F.F.J'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.

S.F.F.J ships an update every 6 months, USEK Official every 4 days. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | S.F.F.J | USEK Official |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Size | 25 MB | 24 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DataRays](https://appshunter.io/developer/1175740339) | [Holy Spirit University of Kaslik - USEK](https://appshunter.io/developer/1813560579) |

## What reviewers say

### S.F.F.J

[App page](https://appshunter.io/ios/app/sffj/id6471678612)

**Features:** macOS Compatibility

**In-app purchases:** none


### USEK Official

[App page](https://appshunter.io/ios/app/usek-official/id6741477064)

**In-app purchases:** none


## Frequently asked questions

### Is S.F.F.J free?

S.F.F.J is free to download, with no in-app purchases.

### Is USEK Official free?

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

### Do S.F.F.J or USEK Official have ads?

Neither S.F.F.J nor USEK Official shows ads.

### Which is updated more often, S.F.F.J or USEK Official?

S.F.F.J ships an update every 6 months, and USEK Official every 4 days. Most recently, S.F.F.J was updated on October 5, 2026 and USEK Official on October 17, 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.*