# pdf vs Countdown Keeper

The clearest difference is price: Countdown Keeper at Free against pdf's $9.99. Countdown Keeper also leads on update cadence (weekly vs every 2 weeks) and device support (3 vs 1). pdf's advantage is in-app purchases (none vs 1). On ads and iOS requirement there is nothing between them.

Countdown Keeper is free to download; pdf costs $9.99 up front. Countdown Keeper sells 1 one-off in-app purchase. pdf asks for nothing beyond the download.

pdf ships an update every 2 weeks, Countdown Keeper weekly. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | pdf | Countdown Keeper |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.4 (27 ratings)](https://appshunter.io/ios/app/pdf-notes-for-ipad/id417200844/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 71.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Paid | — |
| Size | 138 MB | 33 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AMuseTec Co., Ltd.](https://appshunter.io/developer/342152781) | [Abdul Almm](https://appshunter.io/developer/6773164896) |

## What reviewers say

### pdf

[App page](https://appshunter.io/ios/app/pdf-notes-for-ipad/id417200844)

Manage and annotate PDF files on your iPad with fast page turning and intuitive finger-writing. Easily import, organize, and share your notes with friends. Offers a seamless reading and editing experience.

**Highlights:** Fast page turning and content scanning, Intuitive finger-writing with zoom-in, Easy PDF import via Dropbox, Email, or iTunes, Organized bookshelves with search, Variety of pens, highlighters, and text notes, Export annotated PDFs via email

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is pdf free?

pdf costs $9.99, with no in-app purchases.

### Is Countdown Keeper free?

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

### Do pdf or Countdown Keeper have ads?

Neither pdf nor Countdown Keeper shows ads.

### Which is updated more often, pdf or Countdown Keeper?

pdf ships an update every 2 weeks, and Countdown Keeper weekly. Most recently, pdf was updated on October 9, 2026 and Countdown Keeper on October 10, 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.*