# Calendar Clock vs uAuthenticator

The clearest difference is price: uAuthenticator at Free against Calendar Clock's $0.99. uAuthenticator also leads on update cadence (every 3 weeks vs every 41 months) and iOS requirement (15.2 vs 26.5). On ads, in-app purchases and device support there is nothing between them.

uAuthenticator is free to download; Calendar Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calendar Clock ships an update every 41 months, uAuthenticator every 3 weeks. The most recent releases landed on September 10, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Calendar Clock | uAuthenticator |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/uauthenticator/id1515322861/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 75 MB |
| Requires iOS | 26.5 | **15.2** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Systemiko Inc.](https://appshunter.io/developer/680630947) | [Unisys Corp](https://appshunter.io/developer/430698585) |

## What reviewers say

### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.

**Highlights:** All-in-one screen display, Year, month, week, day, hour, minute, second, Switchable theme colors (dark, light, green, blue), Disables device sleep mode, Acts as a desk clock

**Features:** macOS Compatibility

**In-app purchases:** none


### uAuthenticator

[App page](https://appshunter.io/ios/app/uauthenticator/id1515322861)

This app enrolls and authenticates biometric identity information, such as facial images, for a secure SaaS product. It communicates with back-end services via secure APIs. Access requires a specific Customer ID provided after vetting.

**Highlights:** Biometric identity enrollment, Facial image authentication, Secure API communication, Customer ID required for access, SaaS product integration

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Clock free?

Calendar Clock costs $0.99, with no in-app purchases.

### Is uAuthenticator free?

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

### Do Calendar Clock or uAuthenticator have ads?

Neither Calendar Clock nor uAuthenticator shows ads.

### Which is updated more often, Calendar Clock or uAuthenticator?

Calendar Clock ships an update every 41 months, and uAuthenticator every 3 weeks. Most recently, Calendar Clock was updated on September 10, 2026 and uAuthenticator on June 4, 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.*