# Extreme Addition vs Sūji

The clearest difference is update cadence: Extreme Addition at every 3 weeks against Sūji's every 4 months. Extreme Addition also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Extreme Addition ships an update every 3 weeks, Sūji every 4 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Extreme Addition | Sūji |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/suji/id1598173381/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 65 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch | iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [BARTOLI JOHAN](https://appshunter.io/developer/1317257810) | [Ale Mohamad](https://appshunter.io/developer/569018219) |

## What reviewers say

### Extreme Addition

[App page](https://appshunter.io/ios/app/extreme-addition/id1490095010)

This game offers a unique approach to addition, challenging players to boost their mental calculation skills. It features three levels with increasing number complexity and timed rounds to improve speed and reasoning. The game aims to build confidence and concentration through engaging number practice.

**Highlights:** Unique addition mechanics, Boosts mental calculation, Improves speed and reasoning, Three difficulty levels, Timed rounds for score saving, Enhances concentration and confidence

**In-app purchases:** none


### Sūji

[App page](https://appshunter.io/ios/app/suji/id1598173381)

Learn Japanese numbers with this app. It translates numbers into Kanji, Hiragana, or Romaji, and provides audio pronunciation. You can also generate random numbers to explore new combinations.

**Highlights:** Number translation to Kanji, Hiragana, Romaji, Audio pronunciation of numbers, Random number generation, Supports multiple writing systems, Practice writing and speaking

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Extreme Addition free?

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

### Is Sūji free?

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

### Do Extreme Addition or Sūji have ads?

Neither Extreme Addition nor Sūji shows ads.

### Which is updated more often, Extreme Addition or Sūji?

Extreme Addition ships an update every 3 weeks, and Sūji every 4 months. Most recently, Extreme Addition was updated on October 29, 2026 and Sūji on October 30, 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.*