# BioStar Air vs Ustar Pro

The clearest difference is update cadence: Ustar Pro at fortnightly against BioStar Air's every 6 weeks. Ustar Pro also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

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

BioStar Air ships an update every 6 weeks, Ustar Pro fortnightly. The most recent releases landed on October 19, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BioStar Air | Ustar Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/biostar-air/id6745057397/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 133 MB | 26 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SUPREMA](https://appshunter.io/developer/1027628414) | [杭州宇泛智能科技有限公司](https://appshunter.io/developer/1156327327) |

## What reviewers say

### BioStar Air

[App page](https://appshunter.io/ios/app/biostar-air/id6745057397)

Transform your smartphone into a secure mobile key for access control systems. Easily unlock doors at your office, gym, or school with a simple tap. Manage multiple credentials and ensure security with instant revocation options.

**Highlights:** Unlock doors with your phone, Works when phone is locked, Store multiple location credentials, Instant credential revocation, More secure than keycards

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

**In-app purchases:** none


### Ustar Pro

[App page](https://appshunter.io/ios/app/ustar-pro/id6757177965)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BioStar Air free?

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

### Is Ustar Pro free?

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

### Do BioStar Air or Ustar Pro have ads?

Neither BioStar Air nor Ustar Pro shows ads.

### Which is updated more often, BioStar Air or Ustar Pro?

BioStar Air ships an update every 6 weeks, and Ustar Pro fortnightly. Most recently, BioStar Air was updated on October 19, 2026 and Ustar Pro on October 28, 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.*