# Book Tracker vs ShelfMark

The clearest difference is in-app purchases: Book Tracker at none against ShelfMark's 1. Book Tracker also leads on iOS requirement (15.1 vs 18.0). ShelfMark's advantage is update cadence (weekly vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. ShelfMark sells 1 one-off in-app purchase. Book Tracker asks for nothing beyond the download.

Book Tracker ships an update every 3 weeks, ShelfMark weekly. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Book Tracker | ShelfMark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 16 MB | 6 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SAMUEL PREMJI](https://appshunter.io/developer/1767673207) | [InnovaLabWorks](https://appshunter.io/developer/1888514726) |

## What reviewers say

### Book Tracker

[App page](https://appshunter.io/ios/app/book-tracker-readflow/id6757959909)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Book Tracker free?

Book Tracker is free to download, with no in-app purchases.

### Is ShelfMark free?

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

### Do Book Tracker or ShelfMark have ads?

Neither Book Tracker nor ShelfMark shows ads.

### Which is updated more often, Book Tracker or ShelfMark?

Book Tracker ships an update every 3 weeks, and ShelfMark weekly. Most recently, Book Tracker was updated on October 6, 2026 and ShelfMark on October 3, 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.*