# Islands in the Stream — Nurikabe Japan Logic Puzzle

> Logic puzzle game with island painting rules and time trial challenges. (iPhone/iPad app by Stanley Lam.)

- Source: https://appshunter.io/ios/app/islands-in-the-stream/id571234122 (this page in markdown: same URL + `.md`)
- Developer: [Stanley Lam](https://appshunter.io/developer/453164363)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.60/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 20 MB
- Languages: English, Japanese, Chinese, Chinese
- Released: 2012-11-15
- Data updated: 2026-06-11
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/islands-in-the-stream/id571234122/reviews.md

## What is Islands in the Stream?

Are you looking for a new challenge? Are you a Sudoku fan? Try Islands in the Stream.

This game is a logic puzzle with interesting rules.
The challenge is to paint each grid blue or white, subject to the following rules:
1. Each number indicated the number of grids in that island.
2. Each island must contain exactly one numbered grid.
3. There must be only one stream, which is not allowed to contain "pools", i.e. 2x2 area of black cells.

***** Game Features *****

# Content
- More than 500 unique puzzles
- 3 different sizes
- 3 Time Trial modes

# Features
- Record best completion time for each level
- Highlight number if the number of grids matches the number of label
- Highlight 2x2 grids
- "Hint" shows uncompleted islands

# Challenge
- Leaderboards for Time Trial
- Try to complete as many puzzles as possible in fixed time

## Key features

- Over 500 unique puzzles
- 3 different grid sizes
- 3 Time Trial modes
- Record best completion times
- Hint system for uncompleted islands
- Leaderboards for Time Trial

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 5 Hints | $0.99 | one-time |
| Regular Pack 1 (5x5 to 10x10) | $1.99 | one-time |
| Regular Pack 2 (5x5 to 10x10) | $1.99 | one-time |
| 7x7 Mania Pack | $1.99 | one-time |
| 10x10 Mania Pack | $1.99 | one-time |
| Unlock All Packs | $2.99 | one-time |
| 20 Hints | $2.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/islands-in-the-stream/id571234122/reviews.md

### 5/5 — Great game!

*2013-05-23*

This game is great.  Simple in appearance, but forces you to use your brain.  I love strategy games likes these.  Somewhat reminds me of the game mine sweepers.

### 5/5 — Best Nurikabe Out There !!

*2013-02-15*

The most colorful and easiest to learn, this Nurikabe is fun for ALL ages. You may start out with really simple puzzles and because you can place dots as your Islands are formed, the Streams become clearer! Just ignore the timer and have fun. The larger puzzles become more challenging as the experienced players can try to beat the clock with their best times. I have tried them all and this one (finally) tops them all. Well done!  Please improve with levels that I may create myself for a real challenge, islands of ten or more squares.  : )

### 5/5 — So much fun!

*2012-12-07*

Addictive game love this one!

## Frequently asked questions about Islands in the Stream

### What are the rules for Islands in the Stream?

The game requires you to paint each grid blue or white. Each number indicates the size of its island, and each island must have exactly one numbered grid. A single stream must exist without forming 2x2 black cell areas.

### Does Islands in the Stream have ads?

Yes, Islands in the Stream contains advertisements.

### How many puzzles are available in Islands in the Stream?

Islands in the Stream features over 500 unique puzzles, available in three different sizes.

### Can I play Islands in the Stream offline?

The provided data does not specify if Islands in the Stream supports offline play. However, logic puzzle games often function without an internet connection.

### What devices is Islands in the Stream available on?

Islands in the Stream is available for iPhone and iPod devices.

### What is the age rating for Islands in the Stream?

Islands in the Stream has an age rating of 4+, making it suitable for young players.

### How often is Islands in the Stream updated?

The latest version of Islands in the Stream is 1.0.21, last updated on December 17, 2025. This indicates relatively frequent updates.

### Does Islands in the Stream have multiplayer modes?

The game description mentions leaderboards for Time Trial, suggesting a competitive element, but does not explicitly state real-time multiplayer functionality.

## Version history (last 5 releases)

### 1.0.23 — 2026-05-12

- Bug fixes and performance improvements

### 1.0.21 — 2025-12-17

- Bug fixes and performance improvements

### 1.0.20 — 2025-07-07

- Bug fixes and performance improvements

### 1.0.19 — 2024-12-24

- Bug fixes and performance improvements

### 1.0.18 — 2024-01-26

- Bug fixes and performance improvements

## Apps similar to Islands in the Stream

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Mahjong Games·](https://appshunter.io/ios/app/mahjong-games/id1225871920) | 4.7 (129) | Free | Games |
| [Countingmon One](https://appshunter.io/ios/app/countingmon-one/id1402969380) | 5.0 (2) | Free | Games |
| [Number Merger](https://appshunter.io/ios/app/number-merger/id1536321900) | — | Free | Games |
| [Candy Show - Sweet Easter](https://appshunter.io/ios/app/candy-show-sweet-easter/id1344463780) | 4.5 (1,033) | Free | Games |
| [Balls Control!](https://appshunter.io/ios/app/balls-control/id1492211760) | — | Free | Games |
| [Color Lines .](https://appshunter.io/ios/app/color-lines/id1418930900) | — | Free | Games |

## More apps by Stanley Lam

- [Sudoku Revolution](https://appshunter.io/ios/app/sudoku-revolution/id546630587)
- [Samurai Sudoku](https://appshunter.io/ios/app/samurai-sudoku/id594421598)
- [Number Join - Connect numbers](https://appshunter.io/ios/app/number-join-connect-numbers/id603551538)
- [Number Join - Connect Diagonal](https://appshunter.io/ios/app/number-join-connect-diagonal/id611072465)
- [Line Sweeper](https://appshunter.io/ios/app/line-sweeper/id614449716)

All apps by Stanley Lam: https://appshunter.io/developer/453164363

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*