# CatalogBooks vs BookLog

The clearest difference is in-app purchases: CatalogBooks at none against BookLog's 1. BookLog's advantage is update cadence (every 4 days vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. BookLog sells 1 one-off in-app purchase. CatalogBooks asks for nothing beyond the download.

CatalogBooks ships an update every 13 months, BookLog every 4 days. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | CatalogBooks | BookLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 days** |
| Size | 4 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Sollo](https://appshunter.io/developer/1252677323) | [Otto Kiefer](https://appshunter.io/developer/1634632350) |

## What reviewers say

### CatalogBooks

[App page](https://appshunter.io/ios/app/catalogbooks/id1410236464)

**Features:** macOS Compatibility

**In-app purchases:** none


### BookLog

[App page](https://appshunter.io/ios/app/booklog/id6443334545)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $4.99 | one-time |


## Frequently asked questions

### Is CatalogBooks free?

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

### Is BookLog free?

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

### Do CatalogBooks or BookLog have ads?

Neither CatalogBooks nor BookLog shows ads.

### Which is updated more often, CatalogBooks or BookLog?

CatalogBooks ships an update every 13 months, and BookLog every 4 days. Most recently, CatalogBooks was updated on October 7, 2026 and BookLog on October 19, 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.*