# Kusari vs Vocab Runner

The clearest difference is ads: Kusari at none against Vocab Runner's shown. Kusari also leads on iOS requirement (15.1 vs 18.0). Vocab Runner's advantage is update cadence (every 5 days vs every 10 days). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Kusari sells 1 in-app purchase, starting at $29.99 per month and Vocab Runner sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Kusari ships an update every 10 days, Vocab Runner every 5 days. The most recent releases landed on October 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Kusari | Vocab Runner |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 123 MB | 242 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RYUTA ABE](https://appshunter.io/developer/1895880547) | [aito hoshina](https://appshunter.io/developer/6792165110) |

## What reviewers say

### 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 |


### Vocab Runner

[App page](https://appshunter.io/ios/app/vocab-runner/id6798536403)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Super Pass Monthly | $2.99 | per month |
| Super Pass Yearly | $29.99 | per year |
| 60 diamantes | $1.99 | one-time |
| 300 diamantes | $7.99 | one-time |
| 900 diamantes | $19.99 | one-time |
| 3000 diamantes | $59.99 | one-time |


## Frequently asked questions

### Is Kusari free?

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

### Is Vocab Runner free?

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

### Do Kusari or Vocab Runner have ads?

Vocab Runner shows ads; Kusari does not.

### Which is updated more often, Kusari or Vocab Runner?

Kusari ships an update every 10 days, and Vocab Runner every 5 days. Most recently, Kusari was updated on October 7, 2026 and Vocab Runner 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.*