# CLEO. vs BookOwl

The clearest difference is update cadence: CLEO. at every 3 days against BookOwl's every 11 days. CLEO. also leads on iOS requirement (14.0.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CLEO. ships an update every 3 days, BookOwl every 11 days. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | CLEO. | BookOwl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (41 ratings)](https://appshunter.io/ios/app/bookowl-reading-tracker/id6749646194/reviews)** |
| Number of ratings | — | **41** |
| Positive reviews | — | 92.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 11 days |
| Monetization | — | Free |
| Size | 45 MB | 50 MB |
| Requires iOS | **14.0.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rosa Kalaidjian](https://appshunter.io/developer/1696614868) | [Phil Getzen](https://appshunter.io/developer/1830876966) |

## What reviewers say

### CLEO.

[App page](https://appshunter.io/ios/app/cleo/id6451115072)

**Features:** macOS Compatibility

**In-app purchases:** none


### BookOwl

[App page](https://appshunter.io/ios/app/bookowl-reading-tracker/id6749646194)

Organize your reading life with this free companion app. Build your personal library, track your progress, and customize your profile. Import data from other services and scan books instantly. Enjoy personalized recommendations and share your reading insights.

**Highlights:** Barcode scanner for instant book addition, Import from Goodreads, StoryGraph, Audible, Libby, Customizable profile with aurora colors, Half and quarter-star rating system, Custom shelves and curated book lists, Reading progress tracking, Yearly reading goals and streaks

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

**In-app purchases:** none


## Frequently asked questions

### Is CLEO. free?

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

### Is BookOwl free?

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

### Do CLEO. or BookOwl have ads?

Neither CLEO. nor BookOwl shows ads.

### Which is updated more often, CLEO. or BookOwl?

CLEO. ships an update every 3 days, and BookOwl every 11 days. Most recently, CLEO. was updated on October 11, 2026 and BookOwl on October 18, 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.*