# Calendar Clock vs 证件水印

The clearest difference is review sentiment: 证件水印 at 92% against Calendar Clock's 0%. 证件水印 also leads on update cadence (every 14 months vs every 41 months) and iOS requirement (14.0 vs 26.5). Calendar Clock's advantage is price ($0.99 vs $1.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Calendar Clock costs $0.99 and 证件水印 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calendar Clock ships an update every 41 months, 证件水印 every 14 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calendar Clock | 证件水印 |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | — | **[5.0 (12 ratings)](https://appshunter.io/ios/app/id1582930176/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | 0.0% of reviews | **92.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 14 months** |
| Monetization | Paid | Paid |
| Size | 4 MB | 2 MB |
| Requires iOS | 26.5 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Systemiko Inc.](https://appshunter.io/developer/680630947) | [阳理 江](https://appshunter.io/developer/1645314423) |

## 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


### 证件水印

[App page](https://appshunter.io/ios/app/id1582930176)

This utility app allows users to add text watermarks to documents and photos, protecting personal information from misuse. It supports batch processing for up to 50 images and can export in PDF or image formats, including an A4 print mode.

**Highlights:** Add text watermarks, Protect privacy information, A4 copy print mode, Export PDF or image, Batch watermark up to 50 photos, No network requests

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Clock free?

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

### Is 证件水印 free?

证件水印 costs $1.99, with no in-app purchases.

### Do Calendar Clock or 证件水印 have ads?

Neither Calendar Clock nor 证件水印 shows ads.

### Which is updated more often, Calendar Clock or 证件水印?

Calendar Clock ships an update every 41 months, and 证件水印 every 14 months. Most recently, Calendar Clock was updated on October 24, 2026 and 证件水印 on October 27, 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.*