# PDF File Protector vs Event Countdown ProX

The clearest difference is price: Event Countdown ProX at $0.99 against PDF File Protector's $19.99. Event Countdown ProX also leads on in-app purchases (none vs 1). PDF File Protector's advantage is update cadence (every 2 months vs every 9 months) and iOS requirement (16.6 vs 18.4). On ads and device support there is nothing between them.

PDF File Protector costs $19.99 and Event Countdown ProX $0.99 up front. PDF File Protector sells 1 one-off in-app purchase. Event Countdown ProX asks for nothing beyond the download.

PDF File Protector ships an update every 2 months, Event Countdown ProX every 9 months. The most recent releases landed on September 26, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | PDF File Protector | Event Countdown ProX |
| --- | --- | --- |
| Price | $19.99 | **$0.99** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Size | 7 MB | 3 MB |
| Requires iOS | **16.6** | 18.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [Grzegorz Rakoca](https://appshunter.io/developer/1778459428) |

## What reviewers say

### PDF File Protector

[App page](https://appshunter.io/ios/app/pdf-file-protector/id6738285744)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pdf签名内购 | $9.99 | one-time |


### Event Countdown ProX

[App page](https://appshunter.io/ios/app/event-countdown-prox/id6746679926)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF File Protector free?

PDF File Protector costs $19.99, and also offers in-app purchases.

### Is Event Countdown ProX free?

Event Countdown ProX costs $0.99, with no in-app purchases.

### Do PDF File Protector or Event Countdown ProX have ads?

Neither PDF File Protector nor Event Countdown ProX shows ads.

### Which is updated more often, PDF File Protector or Event Countdown ProX?

PDF File Protector ships an update every 2 months, and Event Countdown ProX every 9 months. Most recently, PDF File Protector was updated on September 26, 2026 and Event Countdown ProX on September 14, 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.*