# Jellyfish Tank — A quiet tank of drifting light

> A quiet tank of drifting light (iPhone/iPad app by KOICHI HANAMURA.)

- Source: https://appshunter.io/ios/app/jellyfish-tank/id6797534239 (this page in markdown: same URL + `.md`)
- Developer: [KOICHI HANAMURA](https://appshunter.io/developer/6797534241)
- Category: Games, Entertainment, Simulation
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English, Japanese
- Released: 2026-08-26
- Data updated: 2026-09-29
- User reviews in markdown: https://appshunter.io/ios/app/jellyfish-tank/id6797534239/reviews.md

## What is Jellyfish Tank?

A small, quiet aquarium that lives in your pocket.

Jellyfish drift, glow, and pulse in the dark water. You can simply watch — the tank asks nothing of you.

When you feel like it, care for them: scatter food, clean the water, give them light. Pair two jellies and an egg settles on the rocks. You won't know its color until it grows.

The colors follow an old lexicon — Dew, Madder, Cerulean, Amber, Jade, Coral, Lapis, Aster, Aurora. And on moonless nights, once in a great while, something else.

- No ads in the tank. Watching is never interrupted.
- No subscriptions. No random paid draws.
- Time passes gently even while you're away.
- Your tank follows you to a new device through iCloud.

Raise them slowly. Or just watch the light.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 岩場をひろげる 3 | $2.99 | one-time |
| 岩場をひろげる 2 | $0.99 | one-time |
| テーマ「月夜」 | $1.99 | one-time |
| テーマ「オーロラ」 | $1.99 | one-time |
| しずく 700 | $2.99 | one-time |
| しずく 200 | $0.99 | one-time |
| 深海石 3 | $0.99 | one-time |
| しずく 1500 | $5.99 | one-time |
| 深海石 11 | $2.99 | one-time |
| 深海石 24 | $5.99 | one-time |



## Version history (last 4 releases)

### 1.4 — 2026-09-18

A few more ways to reach in.

- Petting now deepens the bond, a little (up to five times a day)
- From a jellyfish's card, you can give it a feast. The bond rises, and it turns a happy circle
- You can now return jellyfish to the sea from the cove list, too
- Amber eggs are now in the shop

We also revisited how growth is counted while you're away. The water is as calm as before.

### 1.2 — 2026-08-25

育ちのお知らせが、正しいときに届くようになりました。
お知らせにふれると、その子のいる場所へご案内します。

しばらく離れていたあとに開くと、その間に起きたことをお伝えします。
大きな変化はカードで、小さな変化はひとことで。

そのほか、こまかな手ざわりを整えました。

### 1.1 — 2026-08-22

水槽の景色を選べるようになりました。深海は最初から使えます。

・お世話（水をきれいにする・光をあてる）を、下のメニューから開けるようにしました
・「操作のしかた」を新しく用意しました。いつでも読めます
・クラゲに触れると、手ごたえが返るようになりました
・お知らせが届かないことがある問題を直しました
・いまの水槽を、そのまま写真に残せるようになりました
・育てた記録がより確実に残るよう、保存のしくみを見直しました

### 1.0 — 2026-08-19

No release notes.

## Apps similar to Jellyfish Tank

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Cozy Jellyfish: Relax Aquarium](https://appshunter.io/ios/app/cozy-jellyfish-relax-aquarium/id6806495541) | — | Free | Games |
| [みんなのペット](https://appshunter.io/ios/app/id6757325469) | — | Free | Games |
| [ことづての庭](https://appshunter.io/ios/app/id6795906701) | — | Free | Games |
| [Minamo Idle](https://appshunter.io/ios/app/minamo-idle/id6789417923) | — | Free | Games |
| [Idle Cat Room](https://appshunter.io/ios/app/idle-cat-room/id6502765671) | 4.5 (2) | Free | Games |
| [Solo Campfire](https://appshunter.io/ios/app/solo-campfire/id6797917989) | — | Free | Games |

## More apps by KOICHI HANAMURA

- [Weaving Time](https://appshunter.io/ios/app/weaving-time/id6809001968)

All apps by KOICHI HANAMURA: https://appshunter.io/developer/6797534241

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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 2026-09-29.*