# ShelfBuddy vs Underlined

The clearest difference is ads: Underlined at none against ShelfBuddy's shown. ShelfBuddy's advantage is update cadence (every 3 days vs fortnightly) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. ShelfBuddy sells 1 one-off in-app purchase and Underlined sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ShelfBuddy ships an update every 3 days, Underlined fortnightly. The most recent releases landed on November 14, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | ShelfBuddy | Underlined |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/shelfbuddy-book-tracker/id6755234669/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 58 MB | 24 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JAN-HENNING BUNS](https://appshunter.io/developer/1852741600) | [Mert Arman](https://appshunter.io/developer/6795348333) |

## What reviewers say

### ShelfBuddy

[App page](https://appshunter.io/ios/app/shelfbuddy-book-tracker/id6755234669)

Organize your personal library, track reading progress, and discover new books. Manage your collection, set reading goals, and gain insights into your reading habits. Features include barcode scanning, import options, and detailed statistics.

**Highlights:** Digital bookshelf organization, Reading progress tracking, TBR pile management, Book series tracking, Reading statistics and insights, ISBN barcode scanning, Library import/export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShelfBuddy Freischaltung | $19.99 | one-time |


### Underlined

[App page](https://appshunter.io/ios/app/underlined-bookshelf-tracker/id6805132642)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Underlined - Monthly | $2.99 | per month |
| Underlined - Yearly | $19.99 | per year |


## Frequently asked questions

### Is ShelfBuddy free?

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

### Is Underlined free?

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

### Do ShelfBuddy or Underlined have ads?

ShelfBuddy shows ads; Underlined does not.

### Which is updated more often, ShelfBuddy or Underlined?

ShelfBuddy ships an update every 3 days, and Underlined fortnightly. Most recently, ShelfBuddy was updated on November 14, 2026 and Underlined on November 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.*