# 元气背单词 vs Khmer PenPal

The clearest difference is price: Khmer PenPal at Free against 元气背单词's $1.99. 元气背单词's advantage is iOS requirement (11.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

Khmer PenPal is free to download; 元气背单词 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 元气背单词 | Khmer PenPal |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/id6446756014/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 53.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Paid | — |
| Size | 185 MB | 90 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [大连森林互动科技有限公司](https://appshunter.io/developer/1602532041) | [Dona Valy](https://appshunter.io/developer/6783854808) |

## What reviewers say

### 元气背单词

[App page](https://appshunter.io/ios/app/id6446756014)

This app uses the Ebbinghaus forgetting curve to help you learn English vocabulary efficiently. It offers a clean, ad-free interface with various study modes and official word lists. Sync your progress across devices and export your study plans.

**Highlights:** Ebbinghaus memory method, Ad-free learning experience, Official and authoritative word lists, Multiple auxiliary learning modes, Mark unknown words, Cloud backup and synchronization, PDF export

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

**In-app purchases:** none


### Khmer PenPal

[App page](https://appshunter.io/ios/app/khmer-penpal/id6783854806)

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

**In-app purchases:** none


## Frequently asked questions

### Is 元气背单词 free?

元气背单词 costs $1.99, with no in-app purchases.

### Is Khmer PenPal free?

Khmer PenPal is free to download, with no in-app purchases.

### Do 元气背单词 or Khmer PenPal have ads?

Neither 元气背单词 nor Khmer PenPal shows ads.

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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.*