# 学霸拯救地球 vs Attention Flow

The clearest difference is in-app purchases: Attention Flow at none against 学霸拯救地球's 3. 学霸拯救地球's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 学霸拯救地球 sells 3 in-app purchases, starting at $0.99 per month. Attention Flow asks for nothing beyond the download.

学霸拯救地球 ships an update every 2 weeks, Attention Flow every 11 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 学霸拯救地球 | Attention Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (158 ratings)](https://appshunter.io/ios/app/id660145674/reviews)** | — |
| Number of ratings | **158** | — |
| Positive reviews | 95.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 11 days** |
| Size | 148 MB | 8 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 9+ | 4+ |
| Developer | [Zhongbao Zhang](https://appshunter.io/developer/890712456) | [可心 周](https://appshunter.io/developer/1868083044) |

## What reviewers say

### 学霸拯救地球

[App page](https://appshunter.io/ios/app/id660145674)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 按月订阅 | $0.99 | per month |
| 按年订阅 | $2.99 | per year |
| 永久购买 | $3.99 | one-time |


### Attention Flow

[App page](https://appshunter.io/ios/app/attention-flow/id6775757600)

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

**In-app purchases:** none


## Frequently asked questions

### Is 学霸拯救地球 free?

学霸拯救地球 is free to download, with in-app purchases available.

### Is Attention Flow free?

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

### Do 学霸拯救地球 or Attention Flow have ads?

Neither 学霸拯救地球 nor Attention Flow shows ads.

### Which is updated more often, 学霸拯救地球 or Attention Flow?

学霸拯救地球 ships an update every 2 weeks, and Attention Flow every 11 days. Most recently, 学霸拯救地球 was updated on October 23, 2026 and Attention Flow on October 25, 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.*