# Sleep Aquarium — Calm water for bedtime

> Calm water for bedtime (iPhone/iPad app by Takashi Mizuno.)

- Source: https://appshunter.io/ios/app/sleep-aquarium/id6780742952 (this page in markdown: same URL + `.md`)
- Developer: [Takashi Mizuno](https://appshunter.io/developer/1832426578)
- Category: Health & Fitness, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 19 MB
- Languages: American English, Japanese
- Released: 2026-06-17
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/sleep-aquarium/id6780742952/reviews.md

## What is Sleep Aquarium?

Sleep Aquarium creates a quiet aquarium-like soundscape for bedtime.
Gentle water, soft tones, piano-like motifs, and small chimes drift slowly over time without becoming a short repeated loop.

Start a timer, adjust the balance, and let the room settle into a darker, calmer aquarium.

Features
- Original generative water and music layers
- 30-minute, 1-hour, and 2-hour timers
- Controls for water, pad, motif, sparkle, BPM, variation, and sleep depth
- Favorite settings for repeatable bedtime sessions
- Background playback and Lock Screen controls
- Plus unlocks a 10-hour timer, fullscreen aquarium, and three favorite slots

All audio is original and generated inside the app. Sleep Aquarium does not use third-party music, video audio, game audio, or sample libraries.

For bedtime routines, quiet reading, or a calm night background.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sleep Aquarium Plus | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-06-18

No release notes.

## More apps by Takashi Mizuno

- [Perchain - Tax & FX Calc](https://appshunter.io/ios/app/perchain-tax-and-fx-calc/id6749845257)

All apps by Takashi Mizuno: https://appshunter.io/developer/1832426578

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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 2026-06-25.*