# なら森 vs RYUKIN

The clearest difference is price: なら森 at Free against RYUKIN's $3.49. なら森 also leads on in-app purchases (none vs 38) and iOS requirement (13.0 vs 16.0). RYUKIN's advantage is ads (none vs shown). On update cadence and device support there is nothing between them.

なら森 is free to download; RYUKIN costs $3.49 up front. RYUKIN sells 35 one-off in-app purchases. なら森 asks for nothing beyond the download.

なら森 ships an update every 2 weeks, RYUKIN every 8 days. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | なら森 | RYUKIN |
| --- | --- | --- |
| Price | **Free** | $3.49 |
| Rating | — | **[4.9 (62 ratings)](https://appshunter.io/ios/app/ryukin/id6471839445/reviews)** |
| Number of ratings | — | **62** |
| Positive reviews | — | 94.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | — | Paid |
| Size | 28 MB | 229 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Meniac Co.](https://appshunter.io/developer/1514596350) | [Masataka Hakozaki](https://appshunter.io/developer/323346554) |

## What reviewers say

### なら森

[App page](https://appshunter.io/ios/app/id1514596351)

**Features:** macOS Compatibility

**In-app purchases:** none


### RYUKIN

[App page](https://appshunter.io/ios/app/ryukin/id6471839445)

Experience the serene beauty of a virtual goldfish aquarium. Customize your tank, interact with the fish, and enjoy soothing sounds. Features a special mode for young children and a sleep timer for relaxation.

**Highlights:** Interactive goldfish that respond to touch, Customizable tank shape and background, Soothing water sounds and visuals, Cat & Baby Mode for safe play, Sleep timer for bedtime, Clock and date display

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

**In-app purchases (35)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WIREFRAME RAINBOW | $0.99 | one-time |
| ROBO FISH 02 | $1.99 | one-time |
| ROBO FISH 04 | $1.99 | one-time |
| ROBO FISH 06 | $1.99 | one-time |
| GHOST BRIDE | $1.99 | one-time |
| BAT FISH | $1.99 | one-time |
| CALICO ORANGE/WHITE/BLACK | $1.99 | one-time |
| BLACK WHITE KITTY FISH | $1.99 | one-time |
| GHOST TRANSLUCENT | $1.99 | one-time |
| BLACK KITTY FISH | $1.99 | one-time |
| WHITE KITTY FISH | $1.99 | one-time |
| ROBO FISH 03 | $1.99 | one-time |
| GHOST BLACK | $1.99 | one-time |
| ROBO FISH 01 | $1.99 | one-time |
| ORANGE & WHITE KITTY FISH | $1.99 | one-time |
| RED RYUKIN | $1.99 | one-time |
| RED-WHITE RYUKIN | $1.99 | one-time |
| CALICO RED/WHITE/BLACK | $1.99 | one-time |
| ORANGE/WHITE | $1.99 | one-time |
| CALICO RED/GRAY/BLACK | $1.99 | one-time |
| YELLOW GOLD RYUKIN | $1.99 | one-time |
| RED CAP ORANDA | $1.99 | one-time |
| RED/WHITE II | $1.99 | one-time |
| LIONHEAD ORANGE/WHITE/BLACK | $1.99 | one-time |
| GHOST LUMINOUS | $1.99 | one-time |
| BLACK RYUKIN | $1.99 | one-time |
| CALICO KITTY FISH | $1.99 | one-time |
| GRAY WHITE KITTY FISH | $1.99 | one-time |
| WHITE VAMPIRE | $1.99 | one-time |
| BLACK VAMPIRE | $1.99 | one-time |
| BLACK WITCH | $1.99 | one-time |
| WHITE WITCH | $1.99 | one-time |
| ZOMBIE FISH | $1.99 | one-time |
| SKELETON FISH | $1.99 | one-time |
| PANDA TELESCOPE | $1.99 | one-time |

**What reviewers like**

- 💎 Gorgeous and lifelike fish
- 🎨 Beautiful and customizable environments
- 🎶 Soothing water sounds
- 🕰️ Useful clock feature
- 👍 Immersive and relaxing experience

**What reviewers complain about**

- 🔋 High battery consumption on max settings
- 💰 Additional fish require paid purchases
- 🌱 Lack of plant/natural decor options
- 🐟 Limited variety of standard goldfish

**Reported bugs**

- Occasional crashing on high-end devices

**Requested features**

- Ability to change fish colors
- Add more fish species (e.g. bettas, tetras)
- Implement fish breeding/growth mode
- Allow customizing fish placement in tank
- Add desktop/widget mode for always-on display


## Frequently asked questions

### Is なら森 free?

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

### Is RYUKIN free?

RYUKIN costs $3.49, and also offers in-app purchases.

### Do なら森 or RYUKIN have ads?

なら森 shows ads; RYUKIN does not.

### Which is updated more often, なら森 or RYUKIN?

なら森 ships an update every 2 weeks, and RYUKIN every 8 days. Most recently, なら森 was updated on October 25, 2026 and RYUKIN 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.*