# BookOwl vs Understory

The clearest difference is in-app purchases: BookOwl at none against Understory's 6. Understory's advantage is iOS requirement (15.1 vs 18.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Understory sells 6 in-app purchases, starting at $4.99 per month. BookOwl asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for BookOwl against 4.9 for Understory. Both are backed by a comparable volume of ratings — 44 and 58 respectively. Written reviews are what separate them: 92% of BookOwl's written reviews are positive against 96% of Understory's.

BookOwl ships an update every 11 days, Understory every 9 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BookOwl | Understory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (44 ratings)](https://appshunter.io/ios/app/bookowl-reading-tracker/id6749646194/reviews) | **[4.9 (58 ratings)](https://appshunter.io/ios/app/understory-reading-tracker/id6767701983/reviews)** |
| Number of ratings | 44 | **58** |
| Positive reviews | 92.3% of reviews | **95.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 9 days** |
| Monetization | **Free** | Freemium |
| Size | 50 MB | 171 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Phil Getzen](https://appshunter.io/developer/1830876966) | [Understory Studios LLC](https://appshunter.io/developer/1896501166) |

## What reviewers say

### 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


### Understory

[App page](https://appshunter.io/ios/app/understory-reading-tracker/id6767701983)

This app helps you track your reading progress, set goals, and build a consistent reading habit. It features a unique plant aesthetic, social interaction with friends, and the ability to grow real-world trees by meeting reading objectives. Organize your library, share recommendations, and gain insights into your reading habits.

**Highlights:** Track reading progress and log books, Set reading goals and streaks, Grow real-world trees by meeting objectives, Social features for book groups and friends, Organize library with custom lists, Share book recommendations, View reading statistics and insights

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Understory Premium | $4.99 | per month |
| Understory Premium - Monthly | $4.99 | per month |
| Understory Premium | $49.99 | per year |
| Understory Premium - Yearly | $49.99 | per year |
| Streak Freeze | $0.99 | one-time |
| Streak Restore | $0.99 | one-time |


## Frequently asked questions

### Is BookOwl free?

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

### Is Understory free?

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

### Which has better reviews, BookOwl or Understory?

Understory is rated higher. BookOwl averages 4.8 out of 5 from 44 ratings, while Understory averages 4.9 from 58 ratings.

### Do BookOwl or Understory have ads?

Neither BookOwl nor Understory shows ads.

### Which is updated more often, BookOwl or Understory?

BookOwl ships an update every 11 days, and Understory every 9 days. Most recently, BookOwl was updated on October 24, 2026 and Understory on October 28, 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.*