# SmartTub vs aqua − バーチャル水族館

The clearest difference is update cadence: aqua − バーチャル水族館 at weekly against SmartTub's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SmartTub sells 1 one-off in-app purchase and aqua − バーチャル水族館 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SmartTub ships an update every 5 months, aqua − バーチャル水族館 weekly. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | SmartTub | aqua − バーチャル水族館 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13 ratings)](https://appshunter.io/ios/app/smarttub/id435173941/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 70.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 5 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [sorakaze Inc.](https://appshunter.io/developer/1046448101) | [VIRTUALCROSS](https://appshunter.io/developer/1589687997) |

## What reviewers say

### SmartTub

[App page](https://appshunter.io/ios/app/smarttub/id435173941)

Experience a playful virtual bath with floating ducks. Interact with them by tilting your device, shaking to add more, flicking them around, or tapping to hear them quack. Enjoy a simple, interactive entertainment experience.

**Highlights:** Tilt to move ducks, Shake to add ducks, Flick ducks, Tap ducks to quack, Force Touch on Apple Watch to reset

**Features:** Family Sharing, Apple Watch app, iMessage stickers

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extension Pack | $1.99 | one-time |

**What reviewers like**

- 🦆 Cute rubber ducks
- 😌 Relaxing and calming
- 🧸 Good for children
- ✨ Simple and fun
- 💖 Highly recommended

**What reviewers complain about**

- 🤷‍♀️ Lacks clear purpose
- 🥱 Becomes boring quickly
- 💸 In-app purchase expensive
- 🖱️ Limited interaction
- ❓ Confusing controls

**Reported bugs**

- Widget not working
- App not launching on Apple Watch SE
- App icon not appearing on screen

**Requested features**

- Add more toys and variations
- Implement a delete duck feature
- Add different colored ducks
- Allow water to react to touch
- Add a ripple effect


### aqua − バーチャル水族館

[App page](https://appshunter.io/ios/app/aqua/id6819573223)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1回券 | $1.99 | one-time |


## Frequently asked questions

### Is SmartTub free?

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

### Is aqua − バーチャル水族館 free?

aqua − バーチャル水族館 is free to download, with in-app purchases available.

### Do SmartTub or aqua − バーチャル水族館 have ads?

Neither SmartTub nor aqua − バーチャル水族館 shows ads.

### Which is updated more often, SmartTub or aqua − バーチャル水族館?

SmartTub ships an update every 5 months, and aqua − バーチャル水族館 weekly. Most recently, SmartTub was updated on November 6, 2026 and aqua − バーチャル水族館 on November 10, 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.*