# SJI vs UBio

The clearest difference is update cadence: SJI at every 2 weeks against UBio's every 21 months. SJI also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

SJI ships an update every 2 weeks, UBio every 21 months. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | SJI | UBio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 2 weeks** | Every 21 months |
| Size | 1 MB | 40 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [SJI Co.,Ltd](https://appshunter.io/developer/1673658795) | [UNION biometrics Co., Ltd.](https://appshunter.io/developer/937089081) |

## What reviewers say

### SJI

[App page](https://appshunter.io/ios/app/sji-uwbapplication/id1673674516)

**Features:** macOS Compatibility

**In-app purchases:** none


### UBio

[App page](https://appshunter.io/ios/app/ubio-xkey/id6504510418)

**In-app purchases:** none


## Frequently asked questions

### Is SJI free?

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

### Is UBio free?

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

### Which is updated more often, SJI or UBio?

SJI ships an update every 2 weeks, and UBio every 21 months. Most recently, SJI was updated on September 10, 2026 and UBio on September 18, 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.*