# PDF Watermark Assistant vs Life Countdown

The clearest difference is update cadence: Life Countdown at monthly against PDF Watermark Assistant's every 5 months. PDF Watermark Assistant's advantage is price ($0.99 vs $2.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

PDF Watermark Assistant costs $0.99 and Life Countdown $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PDF Watermark Assistant ships an update every 5 months, Life Countdown monthly. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | PDF Watermark Assistant | Life Countdown |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | — | Paid |
| Size | 5 MB | 27 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [雷雷 张](https://appshunter.io/developer/1803875512) |

## What reviewers say

### PDF Watermark Assistant

[App page](https://appshunter.io/ios/app/pdf-watermark-assistant/id6747923103)

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

**In-app purchases:** none


### Life Countdown

[App page](https://appshunter.io/ios/app/life-countdown-days-left/id6751584119)

This app helps you visualize your remaining time by calculating days lived and days left based on your birthday and expected lifespan. It offers a deep space theme, extensive iOS widgets, and prioritizes user privacy with local data storage. All core features are free to use.

**Highlights:** Calculates days lived and remaining, Personalized expected lifespan setting, Deep space theme, Extensive iOS widgets, Local data storage, 14 language support

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Watermark Assistant free?

PDF Watermark Assistant costs $0.99, with no in-app purchases.

### Is Life Countdown free?

Life Countdown costs $2.99, with no in-app purchases.

### Do PDF Watermark Assistant or Life Countdown have ads?

Neither PDF Watermark Assistant nor Life Countdown shows ads.

### Which is updated more often, PDF Watermark Assistant or Life Countdown?

PDF Watermark Assistant ships an update every 5 months, and Life Countdown monthly. Most recently, PDF Watermark Assistant was updated on October 30, 2026 and Life Countdown on November 9, 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.*