# 小书亭 vs Timer4

The clearest difference is rating: 小书亭 at 5.0 against Timer4's 3.8. 小书亭 also leads on in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). Timer4's advantage is ratings volume (5 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Timer4 sells 1 one-off in-app purchase. 小书亭 asks for nothing beyond the download.

小书亭 holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Timer4 has 5 ratings behind it against 1, so its average is the more settled of the two.

小书亭 ships an update monthly, Timer4 every 3 weeks. The most recent releases landed on September 17, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | 小书亭 | Timer4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6738987088/reviews)** | [3.8 (5 ratings)](https://appshunter.io/ios/app/timer4-gravity-timer/id6755321732/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 70 MB | 3 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [林 袁](https://appshunter.io/developer/1781037711) | [Goateraction](https://appshunter.io/developer/1647805479) |

## What reviewers say

### 小书亭

[App page](https://appshunter.io/ios/app/id6738987088)

**Features:** macOS Compatibility

**In-app purchases:** none


### Timer4

[App page](https://appshunter.io/ios/app/timer4-gravity-timer/id6755321732)

This app offers a unique timer experience by automatically adjusting countdown durations based on your device's orientation. Simply rotate your phone to switch between preset intervals with a physics-driven interface and immersive haptic feedback.

**Highlights:** Physics-based interface, Instant duration switching via rotation, Smart motion detection, Immersive haptic feedback, Customizable timer presets, Intuitive orientation control

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is 小书亭 free?

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

### Is Timer4 free?

Timer4 is free to download, with in-app purchases available.

### Which has better reviews, 小书亭 or Timer4?

小书亭 is rated higher. 小书亭 averages 5.0 out of 5 from 1 ratings, while Timer4 averages 3.8 from 5 ratings.

### Do 小书亭 or Timer4 have ads?

Neither 小书亭 nor Timer4 shows ads.

### Which is updated more often, 小书亭 or Timer4?

小书亭 ships an update monthly, and Timer4 every 3 weeks. Most recently, 小书亭 was updated on September 17, 2026 and Timer4 on August 15, 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.*