# MemoryPlanet vs Yoyo Words · 悠悠背单词

The clearest difference is in-app purchases: MemoryPlanet at none against Yoyo Words · 悠悠背单词's 3. MemoryPlanet also leads on update cadence (every 2 days vs every 6 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Yoyo Words · 悠悠背单词 sells 3 in-app purchases, starting at $0.99 per month. MemoryPlanet asks for nothing beyond the download.

MemoryPlanet ships an update every 2 days, Yoyo Words · 悠悠背单词 every 6 days. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | MemoryPlanet | Yoyo Words · 悠悠背单词 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 days |
| Size | 24 MB | 7 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [业顷 蓝](https://appshunter.io/developer/6773348134) | [应敏 李](https://appshunter.io/developer/6779647767) |

## What reviewers say

### MemoryPlanet

[App page](https://appshunter.io/ios/app/memoryplanet-flashcards/id6773370158)

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

**In-app purchases:** none


### Yoyo Words · 悠悠背单词

[App page](https://appshunter.io/ios/app/yoyo-words/id6780153756)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| 年度会员 | $9.99 | per year |
| 终身会员 | $39.99 | one-time |


## Frequently asked questions

### Is MemoryPlanet free?

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

### Is Yoyo Words · 悠悠背单词 free?

Yoyo Words · 悠悠背单词 is free to download, with in-app purchases available.

### Do MemoryPlanet or Yoyo Words · 悠悠背单词 have ads?

Neither MemoryPlanet nor Yoyo Words · 悠悠背单词 shows ads.

### Which is updated more often, MemoryPlanet or Yoyo Words · 悠悠背单词?

MemoryPlanet ships an update every 2 days, and Yoyo Words · 悠悠背单词 every 6 days. Most recently, MemoryPlanet was updated on October 9, 2026 and Yoyo Words · 悠悠背单词 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.*