# 别白干 vs 专注的卡皮：ADHD专注计时器

The clearest difference is in-app purchases: 专注的卡皮：ADHD专注计时器 at none against 别白干's 4. 别白干's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. 别白干 sells 4 in-app purchases, starting at $3.99 per month. 专注的卡皮：ADHD专注计时器 asks for nothing beyond the download.

别白干 ships an update every 3 days, 专注的卡皮：ADHD专注计时器 every 2 days. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 别白干 | 专注的卡皮：ADHD专注计时器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 48 MB | 111 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [语婷 张](https://appshunter.io/developer/1882916238) | [jing tu](https://appshunter.io/developer/6790810917) |

## What reviewers say

### 别白干

[App page](https://appshunter.io/ios/app/id6760716221)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| birdle月卡 | $3.99 | per month |
| Birdle 会员季卡 | $6.99 | per 3 months |
| Birdle 限时会员年卡 | $9.99 | per year |
| Birdle 会员年卡 | $12.99 | per year |


### 专注的卡皮：ADHD专注计时器

[App page](https://appshunter.io/ios/app/adhd/id6820098621)

**In-app purchases:** none


## Frequently asked questions

### Is 别白干 free?

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

### Is 专注的卡皮：ADHD专注计时器 free?

专注的卡皮：ADHD专注计时器 is free to download, with no in-app purchases.

### Do 别白干 or 专注的卡皮：ADHD专注计时器 have ads?

Neither 别白干 nor 专注的卡皮：ADHD专注计时器 shows ads.

### Which is updated more often, 别白干 or 专注的卡皮：ADHD专注计时器?

别白干 ships an update every 3 days, and 专注的卡皮：ADHD专注计时器 every 2 days. Most recently, 别白干 was updated on October 24, 2026 and 专注的卡皮：ADHD专注计时器 on October 29, 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.*