# J PREP Friends vs Terakoya

The clearest difference is update cadence: Terakoya at every 9 days against J PREP Friends's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

J PREP Friends ships an update monthly, Terakoya every 9 days. The most recent releases landed on November 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | J PREP Friends | Terakoya |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | — |
| Size | 236 MB | 75 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [J PREP INC.](https://appshunter.io/developer/1540035783) | [株式会社 Terakoya.AI](https://appshunter.io/developer/1658243013) |

## What reviewers say

### J PREP Friends

[App page](https://appshunter.io/ios/app/j-prep-friends/id1540035781)

This educational app allows students to review and prepare for lessons at home. It is designed to supplement classroom learning for J PREP Kids students.

**Highlights:** Lesson review, Lesson preparation, Home study tool, For J PREP Kids students

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

**In-app purchases:** none


### Terakoya

[App page](https://appshunter.io/ios/app/terakoya/id6749531641)

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

**In-app purchases:** none


## Frequently asked questions

### Is J PREP Friends free?

J PREP Friends is free to download, with no in-app purchases.

### Is Terakoya free?

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

### Do J PREP Friends or Terakoya have ads?

Neither J PREP Friends nor Terakoya shows ads.

### Which is updated more often, J PREP Friends or Terakoya?

J PREP Friends ships an update monthly, and Terakoya every 9 days. Most recently, J PREP Friends was updated on November 7, 2026 and Terakoya on October 28, 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.*