# ZKBioTime vs Blue

The clearest difference is iOS requirement: ZKBioTime at 13.0 against Blue's 15.6. On price, update cadence, 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.

ZKBioTime ships an update every 3 months, Blue every 2 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ZKBioTime | Blue |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/zkbiotime/id1328240723/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 13.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 22 MB | 25 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZKTECO SECURITY LLC](https://appshunter.io/developer/1328240722) | [mustafa elgezen](https://appshunter.io/developer/1542467710) |

## What reviewers say

### ZKBioTime

[App page](https://appshunter.io/ios/app/zkbiotime/id1328240723)

This real-time attendance app allows employees to clock in with location data and manage requests. It provides announcements and reports, with configurable administrator and employee access levels. Ideal for businesses with mobile workforces.

**Highlights:** Real-time clock-in with GPS, Employee request management, Announcements and reports, Configurable user levels, Online notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### Blue

[App page](https://appshunter.io/ios/app/blue-c/id6775450353)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZKBioTime free?

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

### Is Blue free?

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

### Do ZKBioTime or Blue have ads?

Neither ZKBioTime nor Blue shows ads.

### Which is updated more often, ZKBioTime or Blue?

ZKBioTime ships an update every 3 months, and Blue every 2 months. Most recently, ZKBioTime was updated on November 2, 2026 and Blue on October 31, 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.*