# ReeeeecallStudy vs Sekai Kanji

The clearest difference is in-app purchases: ReeeeecallStudy at none against Sekai Kanji's 1. Sekai Kanji's advantage is update cadence (every 2 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sekai Kanji sells 1 one-off in-app purchase. ReeeeecallStudy asks for nothing beyond the download.

ReeeeecallStudy ships an update monthly, Sekai Kanji every 2 days. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ReeeeecallStudy | Sekai Kanji |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 45 MB | 19 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [jiyong park](https://appshunter.io/developer/1891220213) | [thanh tung le](https://appshunter.io/developer/6810985219) |

## What reviewers say

### ReeeeecallStudy

[App page](https://appshunter.io/ios/app/reeeeecallstudy-flashcards/id6761741123)

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

**In-app purchases:** none


### Sekai Kanji

[App page](https://appshunter.io/ios/app/sekai-kanji/id6810985217)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trọn đời | $12.99 | one-time |


## Frequently asked questions

### Is ReeeeecallStudy free?

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

### Is Sekai Kanji free?

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

### Do ReeeeecallStudy or Sekai Kanji have ads?

Neither ReeeeecallStudy nor Sekai Kanji shows ads.

### Which is updated more often, ReeeeecallStudy or Sekai Kanji?

ReeeeecallStudy ships an update monthly, and Sekai Kanji every 2 days. Most recently, ReeeeecallStudy was updated on October 6, 2026 and Sekai Kanji on October 20, 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.*