# REVERSI ZERO vs Katam

The clearest difference is in-app purchases: Katam at none against REVERSI ZERO's 1. Katam also leads on ads (none vs shown). REVERSI ZERO's advantage is device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. REVERSI ZERO sells 1 one-off in-app purchase. Katam asks for nothing beyond the download.

REVERSI ZERO ships an update monthly, Katam every 5 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | REVERSI ZERO | Katam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (75 ratings)](https://appshunter.io/ios/app/reversi-zero/id1126032958/reviews)** | — |
| Number of ratings | **75** | — |
| Positive reviews | 86.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 198 MB | 14 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RELEASE BASE, K.K.](https://appshunter.io/developer/1380525668) | [seiji honda](https://appshunter.io/developer/1896430544) |

## What reviewers say

### REVERSI ZERO

[App page](https://appshunter.io/ios/app/reversi-zero/id1126032958)

Experience a classic board game with multiple difficulty levels and intuitive controls. Compete with players worldwide for the highest score in a dedicated marathon mode. Enjoy a challenging and engaging gameplay experience designed for all skill levels.

**Highlights:** Up to level 75, Good operability, High score competition, Adjustable difficulty levels (Lv1-Lv50), One-hand operation, Marathon mode

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムサービス30日間 | $3.99 | one-time |


### Katam

[App page](https://appshunter.io/ios/app/katam-kerow/id6785136424)

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

**In-app purchases:** none


## Frequently asked questions

### Is REVERSI ZERO free?

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

### Is Katam free?

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

### Do REVERSI ZERO or Katam have ads?

REVERSI ZERO shows ads; Katam does not.

### Which is updated more often, REVERSI ZERO or Katam?

REVERSI ZERO ships an update monthly, and Katam every 5 weeks. Most recently, REVERSI ZERO was updated on November 6, 2026 and Katam on October 31, 2026.

---

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