# StudyJunkie vs Kusari

The clearest difference is in-app purchases: StudyJunkie at none against Kusari's 1. Kusari's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence, ads 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. StudyJunkie asks for nothing beyond the download.

StudyJunkie ships an update every 2 weeks, Kusari every 10 days. The most recent releases landed on September 28, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | StudyJunkie | Kusari |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 123 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KAZUHIRO KAMAKURA](https://appshunter.io/developer/556240381) | [RYUTA ABE](https://appshunter.io/developer/1895880547) |

## What reviewers say

### StudyJunkie

[App page](https://appshunter.io/ios/app/studyjunkie/id6758565892)

**Features:** macOS Compatibility

**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 StudyJunkie free?

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

### Is Kusari free?

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

### Do StudyJunkie or Kusari have ads?

Neither StudyJunkie nor Kusari shows ads.

### Which is updated more often, StudyJunkie or Kusari?

StudyJunkie ships an update every 2 weeks, and Kusari every 10 days. Most recently, StudyJunkie was updated on September 28, 2026 and Kusari on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*