# LinguaTube：自由な動画で楽しく英語を学ぼう vs Kusari

The clearest difference is in-app purchases: LinguaTube：自由な動画で楽しく英語を学ぼう at none against Kusari's 1. LinguaTube：自由な動画で楽しく英語を学ぼう also leads on iOS requirement (12.0 vs 15.1). Kusari's advantage is device support. On price there is nothing between them.

Both are free to download. Kusari sells 1 in-app purchase, starting at $29.99 per month. LinguaTube：自由な動画で楽しく英語を学ぼう asks for nothing beyond the download.

## The numbers

| Metric | LinguaTube：自由な動画で楽しく英語を学ぼう | Kusari |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 10 days |
| Monetization | — | Free with in-app purchases |
| Size | 62 MB | 123 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dors.ai](https://appshunter.io/developer/1703467655) | [RYUTA ABE](https://appshunter.io/developer/1895880547) |

## What reviewers say

### LinguaTube：自由な動画で楽しく英語を学ぼう

[App page](https://appshunter.io/ios/app/linguatube/id6532592889)

**In-app purchases:** none


### Kusari

[App page](https://appshunter.io/ios/app/kusari/id6764690812)

This app uses behavioral economics to build a daily English learning habit. It employs a commitment device where users risk losing money if they miss their daily tasks, encouraging consistent practice through financial stakes rather than willpower. Daily activities include reading, shadowing, and AI conversation, taking 15-20 minutes.

**Highlights:** Commitment device with financial stakes, Daily reading, shadowing, and AI conversation, 15-20 minute daily tasks, Behavioral economics principles applied, Dynamic skill level adjustment (CEFR A1-C2), Tiered pricing based on daily achievement

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kusari Monthly | $29.99 | per month |


## Frequently asked questions

### Is LinguaTube：自由な動画で楽しく英語を学ぼう free?

LinguaTube：自由な動画で楽しく英語を学ぼう is free to download, with no in-app purchases.

### Is Kusari free?

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

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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.*