# ZKBio Zexus vs S3 Browser

The clearest difference is price: ZKBio Zexus at Free against S3 Browser's $0.99. S3 Browser's advantage is update cadence (fortnightly vs every 4 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

ZKBio Zexus is free to download; S3 Browser costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZKBio Zexus ships an update every 4 months, S3 Browser fortnightly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ZKBio Zexus | S3 Browser |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Size | 130 MB | 19 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZKTeco Inc.](https://appshunter.io/developer/955313767) | [Chris Sewell](https://appshunter.io/developer/1873376535) |

## What reviewers say

### ZKBio Zexus

[App page](https://appshunter.io/ios/app/zkbio-zexus/id6475019565)

**Features:** macOS Compatibility

**In-app purchases:** none


### S3 Browser

[App page](https://appshunter.io/ios/app/s3-browser/id6758526575)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZKBio Zexus free?

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

### Is S3 Browser free?

S3 Browser costs $0.99, with no in-app purchases.

### Do ZKBio Zexus or S3 Browser have ads?

Neither ZKBio Zexus nor S3 Browser shows ads.

### Which is updated more often, ZKBio Zexus or S3 Browser?

ZKBio Zexus ships an update every 4 months, and S3 Browser fortnightly. Most recently, ZKBio Zexus was updated on November 4, 2026 and S3 Browser on November 5, 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.*