# 默默学汉字 vs Prefrontal Lab

The clearest difference is device support: 默默学汉字 at 3 against Prefrontal Lab's 1. 默默学汉字 also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

默默学汉字 ships an update every 4 weeks, Prefrontal Lab every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 默默学汉字 | Prefrontal Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/id1568698778/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Size | 144 MB | 5 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [富海 肖](https://appshunter.io/developer/1529732494) | [Ziyu He](https://appshunter.io/developer/1837600075) |

## What reviewers say

### 默默学汉字

[App page](https://appshunter.io/ios/app/id1568698778)

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

**In-app purchases:** none


### Prefrontal Lab

[App page](https://appshunter.io/ios/app/prefrontal-lab/id6774438286)

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

**In-app purchases:** none


## Frequently asked questions

### Is 默默学汉字 free?

默默学汉字 is free to download, with no in-app purchases.

### Is Prefrontal Lab free?

Prefrontal Lab is free to download, with no in-app purchases.

### Do 默默学汉字 or Prefrontal Lab have ads?

Neither 默默学汉字 nor Prefrontal Lab shows ads.

### Which is updated more often, 默默学汉字 or Prefrontal Lab?

默默学汉字 ships an update every 4 weeks, and Prefrontal Lab every 3 weeks. Most recently, 默默学汉字 was updated on October 30, 2026 and Prefrontal Lab 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.*