# KOZO vs CHAM

KOZO and CHAM are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

KOZO ships an update every 31 months, CHAM every 39 months. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | KOZO | CHAM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 31 months** | Every 39 months |
| Size | 4 MB | 3 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Naoya Takahashi](https://appshunter.io/developer/1301211980) | [Ryohei Oosawa](https://appshunter.io/developer/1628237823) |

## What reviewers say

### KOZO

[App page](https://appshunter.io/ios/app/kozo/id1523961762)

**Features:** macOS Compatibility

**In-app purchases:** none


### CHAM

[App page](https://appshunter.io/ios/app/chamo2lanhr/id1628237821)

**In-app purchases:** none


## Frequently asked questions

### Is KOZO free?

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

### Is CHAM free?

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

### Do KOZO or CHAM have ads?

Neither KOZO nor CHAM shows ads.

### Which is updated more often, KOZO or CHAM?

KOZO ships an update every 31 months, and CHAM every 39 months. Most recently, KOZO was updated on October 10, 2026 and CHAM on October 3, 2026.

---

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