# Hoowlib vs BookGrass

The clearest difference is update cadence: BookGrass at daily against Hoowlib's every 2 months. Hoowlib's advantage is iOS requirement (15.0 vs 17.6). 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.

Hoowlib ships an update every 2 months, BookGrass daily. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Hoowlib | BookGrass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Size | 20 MB | 9 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nikolas Palm](https://appshunter.io/developer/1825841930) | [Jaeyoung Heo](https://appshunter.io/developer/1833670805) |

## What reviewers say

### Hoowlib

[App page](https://appshunter.io/ios/app/hoowlib/id6748452885)

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

**In-app purchases:** none


### BookGrass

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

**In-app purchases:** none


## Frequently asked questions

### Is Hoowlib free?

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

### Is BookGrass free?

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

### Do Hoowlib or BookGrass have ads?

Neither Hoowlib nor BookGrass shows ads.

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

Hoowlib ships an update every 2 months, and BookGrass daily. Most recently, Hoowlib was updated on October 8, 2026 and BookGrass on October 12, 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.*