# Timer4 vs 理词本

The clearest difference is in-app purchases: 理词本 at none against Timer4's 1. 理词本 also leads on update cadence (daily vs every 3 weeks) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

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

Timer4 ships an update every 3 weeks, 理词本 daily. The most recent releases landed on August 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Timer4 | 理词本 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (5 ratings)](https://appshunter.io/ios/app/timer4-gravity-timer/id6755321732/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 19 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Goateraction](https://appshunter.io/developer/1647805479) | [鹏飞 高](https://appshunter.io/developer/1747456623) |

## What reviewers say

### 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 |


### 理词本

[App page](https://appshunter.io/ios/app/id6761205445)

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

**In-app purchases:** none


## Frequently asked questions

### Is Timer4 free?

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

### Is 理词本 free?

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

### Do Timer4 or 理词本 have ads?

Neither Timer4 nor 理词本 shows ads.

### Which is updated more often, Timer4 or 理词本?

Timer4 ships an update every 3 weeks, and 理词本 daily. Most recently, Timer4 was updated on August 15, 2026 and 理词本 on September 17, 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.*