# Kōtsū vs DEEJI（でーじ）

The clearest difference is update cadence: DEEJI（でーじ） at every 3 days against Kōtsū's every 3 weeks. Kōtsū's advantage is iOS requirement (10.0 vs 18.0). 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.

Kōtsū ships an update every 3 weeks, DEEJI（でーじ） every 3 days. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Kōtsū | DEEJI（でーじ） |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 16 MB | 73 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [NAIST UBI](https://appshunter.io/developer/1184713497) | [Kentaro Furukawa](https://appshunter.io/developer/1852769511) |

## What reviewers say

### Kōtsū

[App page](https://appshunter.io/ios/app/kotsu/id1396413921)

**Features:** macOS Compatibility

**In-app purchases:** none


### DEEJI（でーじ）

[App page](https://appshunter.io/ios/app/deeji/id6755240657)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kōtsū free?

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

### Is DEEJI（でーじ） free?

DEEJI（でーじ） is free to download, with no in-app purchases.

### Do Kōtsū or DEEJI（でーじ） have ads?

Neither Kōtsū nor DEEJI（でーじ） shows ads.

### Which is updated more often, Kōtsū or DEEJI（でーじ）?

Kōtsū ships an update every 3 weeks, and DEEJI（でーじ） every 3 days. Most recently, Kōtsū was updated on October 4, 2026 and DEEJI（でーじ） on October 16, 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.*