# Countdown Keeper vs PDF Compressor

The clearest difference is in-app purchases: PDF Compressor at none against Countdown Keeper's 1. Countdown Keeper's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Countdown Keeper sells 1 one-off in-app purchase. PDF Compressor asks for nothing beyond the download.

Countdown Keeper ships an update weekly, PDF Compressor every 6 days. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Countdown Keeper | PDF Compressor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 6 days** |
| Size | 33 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Abdul Almm](https://appshunter.io/developer/6773164896) | [Jeny Goentoro](https://appshunter.io/developer/6774213231) |

## What reviewers say

### Countdown Keeper

[App page](https://appshunter.io/ios/app/countdown-keeper/id6806348941)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $0.99 | one-time |


### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor/id6814202940)

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

**In-app purchases:** none


## Frequently asked questions

### Is Countdown Keeper free?

Countdown Keeper is free to download, with in-app purchases available.

### Is PDF Compressor free?

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

### Do Countdown Keeper or PDF Compressor have ads?

PDF Compressor shows ads; Countdown Keeper does not.

### Which is updated more often, Countdown Keeper or PDF Compressor?

Countdown Keeper ships an update weekly, and PDF Compressor every 6 days. Most recently, Countdown Keeper was updated on October 29, 2026 and PDF Compressor on October 26, 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.*