# Book Tracker vs ShelfMark

Book Tracker and ShelfMark are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Book Tracker sells 3 in-app purchases, starting at $14.99 per year and ShelfMark sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Book Tracker ships an update every 2 weeks, ShelfMark weekly. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Book Tracker | ShelfMark |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Freemium | — |
| Size | 65 MB | 6 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Bird](https://appshunter.io/developer/962597630) | [InnovaLabWorks](https://appshunter.io/developer/1888514726) |

## What reviewers say

### Book Tracker

[App page](https://appshunter.io/ios/app/book-tracker-isbn-library/id6760241959)

Easily catalog your book collection by scanning ISBNs or adding manually. Organize by genre, reading status, and custom fields. Keep your library private and accessible offline.

**Highlights:** Scan ISBNs with camera, Manual book entry, Import from Excel/CSV, Organize by genre and status, Customizable fields, Offline access, Data export

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $14.99 | per year |
| Unlock All Features for 1 Week | $14.99 | one-time |
| Lifetime Access | $39.99 | one-time |


### 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 in-app purchases available.

### 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 2 weeks, and ShelfMark weekly. Most recently, Book Tracker was updated on October 10, 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.*