# Kakuso Challenge vs Flull Flash 1000

The clearest difference is update cadence: Flull Flash 1000 at every 3 days against Kakuso Challenge's every 6 months. Kakuso Challenge's advantage is iOS requirement (13.1 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Kakuso Challenge sells 3 one-off in-app purchases and Flull Flash 1000 sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Kakuso Challenge ships an update every 6 months, Flull Flash 1000 every 3 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | Kakuso Challenge | Flull Flash 1000 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/flull-flash-1000/id1559676655/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 81.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 17 MB | 81 MB |
| Requires iOS | **13.1** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alven Kam](https://appshunter.io/developer/1227687322) | [Naoki Nakamichi](https://appshunter.io/developer/1534276177) |

## What reviewers say

### Kakuso Challenge

[App page](https://appshunter.io/ios/app/kakuso-challenge/id1485845940)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kakuso Challenge 20 Hints | $0.99 | one-time |
| Kakuso Challenge 50 Hints | $1.99 | one-time |
| Kakuso Challenge 100 Hints | $2.99 | one-time |


### Flull Flash 1000

[App page](https://appshunter.io/ios/app/flull-flash-1000/id1559676655)

This quiz app focuses on multi-wait patterns in Mahjong. It offers over 1000 questions with visual breakdowns to help users understand and quickly improve their waiting pattern recognition and decision-making skills.

**Highlights:** Multi-wait pattern quizzes, Over 1000 questions, Visual breakdown of waits, Level-based learning, Review of incorrect answers, Time attack mode

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $1.99 | per month |
| Pro (yearly) | $12.99 | per year |
| Tile type changeable option | $2.99 | one-time |
| 買い切りプラン | $29.99 | one-time |


## Frequently asked questions

### Is Kakuso Challenge free?

Kakuso Challenge is free to download, with in-app purchases available.

### Is Flull Flash 1000 free?

Flull Flash 1000 is free to download, with in-app purchases available.

### Do Kakuso Challenge or Flull Flash 1000 have ads?

Both Kakuso Challenge and Flull Flash 1000 show ads.

### Which is updated more often, Kakuso Challenge or Flull Flash 1000?

Kakuso Challenge ships an update every 6 months, and Flull Flash 1000 every 3 days. Most recently, Kakuso Challenge was updated on November 3, 2026 and Flull Flash 1000 on November 3, 2026.

---

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