# ShelfMark vs RookReader

The clearest difference is iOS requirement: RookReader at 15.5 against ShelfMark's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. ShelfMark sells 1 one-off in-app purchase and RookReader sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ShelfMark ships an update weekly, RookReader every 5 days. The most recent releases landed on October 3, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | ShelfMark | RookReader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 6 MB | 68 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [InnovaLabWorks](https://appshunter.io/developer/1888514726) | [Ansh Sharma](https://appshunter.io/developer/6811009672) |

## What reviewers say

### ShelfMark

[App page](https://appshunter.io/ios/app/shelfmark-reading-tracker/id6788129809)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShelfMark Lifetime | $12.99 | one-time |


### RookReader

[App page](https://appshunter.io/ios/app/rookreader-ebook-and-audiobook/id6811009670)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 60 Rook AI credits | $2.99 | one-time |
| 180 Rook AI credits | $7.99 | one-time |
| RookReader Pro | $8.99 | one-time |
| 500 Rook AI credits | $19.99 | one-time |


## Frequently asked questions

### Is ShelfMark free?

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

### Is RookReader free?

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

### Do ShelfMark or RookReader have ads?

Neither ShelfMark nor RookReader shows ads.

### Which is updated more often, ShelfMark or RookReader?

ShelfMark ships an update weekly, and RookReader every 5 days. Most recently, ShelfMark was updated on October 3, 2026 and RookReader on October 21, 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.*