# 学霸拯救地球 vs Donera

The clearest difference is ratings volume: 学霸拯救地球 at 158 against Donera's 1. 学霸拯救地球 also leads on iOS requirement (13.0 vs 17.0). Donera's advantage is rating (5.0 vs 4.7) and update cadence (every 8 days vs every 2 weeks). On price, ads, in-app purchases 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 and Donera sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Donera holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 学霸拯救地球 has 158 ratings behind it against 1, so its average is the more settled of the two.

学霸拯救地球 ships an update every 2 weeks, Donera every 8 days. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | 学霸拯救地球 | Donera |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (158 ratings)](https://appshunter.io/ios/app/id660145674/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/donera-screen-time-control/id6476958527/reviews)** |
| Number of ratings | **158** | 1 |
| Positive reviews | 95.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | — | Freemium |
| Size | 148 MB | 131 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Zhongbao Zhang](https://appshunter.io/developer/890712456) | [雄志 夏](https://appshunter.io/developer/1690023525) |

## 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 |


### Donera

[App page](https://appshunter.io/ios/app/donera-screen-time-control/id6476958527)

This app helps you focus on your most important task by locking distracting applications until your goal is completed. It encourages single-tasking and provides a calm focus mode, with a widget for constant visibility. Designed for simplicity and guilt-free productivity.

**Highlights:** Lock distracting apps, Focus on one task (Highlight), Calm Focus mode, Home Screen widget, Goal planning, Mood and streak tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Annual | $19.99 | per year |
| Pro Lifetime Unlock | $39.99 | one-time |


## 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 Donera free?

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

### Which has better reviews, 学霸拯救地球 or Donera?

Donera is rated higher. 学霸拯救地球 averages 4.7 out of 5 from 158 ratings, while Donera averages 5.0 from 1 ratings.

### Do 学霸拯救地球 or Donera have ads?

Neither 学霸拯救地球 nor Donera shows ads.

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

学霸拯救地球 ships an update every 2 weeks, and Donera every 8 days. Most recently, 学霸拯救地球 was updated on November 1, 2026 and Donera on November 8, 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.*