# BookGrass vs BookWorm

The clearest difference is in-app purchases: BookGrass at none against BookWorm's 3. BookGrass also leads on update cadence (daily vs every 9 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. BookWorm sells 3 one-off in-app purchases. BookGrass asks for nothing beyond the download.

BookGrass ships an update daily, BookWorm every 9 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | BookGrass | BookWorm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/bookworm-reading-tracker/id6761390761/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 27 MB |
| Requires iOS | 17.6 | **17.2** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jaeyoung Heo](https://appshunter.io/developer/1833670805) | [Adam Markocki](https://appshunter.io/developer/1859270013) |

## What reviewers say

### BookGrass

[App page](https://appshunter.io/ios/app/bookgrass/id6757300121)

**In-app purchases:** none


### BookWorm

[App page](https://appshunter.io/ios/app/bookworm-reading-tracker/id6761390761)

This app helps you build a consistent reading habit by tracking books, ebooks, and audiobooks. Set daily goals, maintain streaks, and organize your library. It offers gentle reminders and progress insights to encourage more reading.

**Highlights:** Daily reading goals (pages/minutes), Reading streak tracking, Log print books, ebooks, and audiobooks, Organize library (Reading, To Read, Finished), Reading timer, Monthly progress recaps, Shareable reading stats

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| An espresso | $2.99 | one-time |
| Coffee & croissant | $4.99 | one-time |
| A week of coffee | $9.99 | one-time |


## Frequently asked questions

### Is BookGrass free?

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

### Is BookWorm free?

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

### Do BookGrass or BookWorm have ads?

Neither BookGrass nor BookWorm shows ads.

### Which is updated more often, BookGrass or BookWorm?

BookGrass ships an update daily, and BookWorm every 9 days. Most recently, BookGrass was updated on November 9, 2026 and BookWorm on November 5, 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.*