# 专注时钟 vs i专注

The clearest difference is in-app purchases: 专注时钟 at none against i专注's 1. 专注时钟 also leads on iOS requirement (13.0 vs 17). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. i专注 sells 1 one-off in-app purchase. 专注时钟 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 专注时钟 | i专注 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (67 ratings)](https://appshunter.io/ios/app/id1495041057/reviews)** | — |
| Number of ratings | **67** | — |
| Positive reviews | 97.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 110 MB | 17 MB |
| Requires iOS | **13.0** | 17 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [飞剑 姚](https://appshunter.io/developer/1113334129) | [迎祥 范](https://appshunter.io/developer/1536256199) |

## What reviewers say

### 专注时钟

[App page](https://appshunter.io/ios/app/id1495041057)

Enhance focus and productivity with a customizable digital clock, countdown timer, and a variety of white noise soundscapes. Designed to help you enter work or study states faster and more efficiently.

**Highlights:** Full screen digital clock, Countdown timer, Customizable UI styles, Variety of white noise background sounds, Firecrackers & Fireworks animation (New Year's theme)

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

**In-app purchases:** none


### i专注

[App page](https://appshunter.io/ios/app/i/id6799613009)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | one-time |


## Frequently asked questions

### Is 专注时钟 free?

专注时钟 is free to download, with no in-app purchases.

### Is i专注 free?

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

### Do 专注时钟 or i专注 have ads?

Neither 专注时钟 nor i专注 shows ads.

### Which is updated more often, 专注时钟 or i专注?

专注时钟 ships an update every 3 weeks, and i专注 every 3 weeks. Most recently, 专注时钟 was updated on November 7, 2026 and i专注 on October 31, 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.*