# Ototsuzuku - 音つづく — Ambient sound & sleep timer

> Ambient sound & sleep timer (iPhone/iPad app by shigeto nakawaka.)

- Source: https://appshunter.io/ios/app/ototsuzuku/id6815112722 (this page in markdown: same URL + `.md`)
- Developer: [shigeto nakawaka](https://appshunter.io/developer/368421363)
- Category: Health & Fitness, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 1 MB
- Languages: American English, Japanese
- Released: 2026-09-24
- Data updated: 2026-10-22

## What is Ototsuzuku?

Ototsuzuku makes sound that keeps going.

There are no audio files inside. Everything is synthesised as you listen.
That is why the same few minutes never come back: the scene changes every few minutes, and keeps drifting in between.

■ One finger decides the sound
Brightness and movement are a position on a pad. Sway, space, width and brainwave are four rings around it.
Instead of twenty sliders, six things you can feel.

■ Six sounds to start from
Deep Sleep / Drowse / Meditation / Calm / Focus / Journey.
Pick one, move it around, and save it under your own name.

■ Made for falling asleep to
15 to 90 minutes, or no limit at all. It never cuts off — the last few minutes fade away.
Turn on "Descend into sleep" and the difference between your ears comes down over time, with the bells thinning out.
The screen dims itself when you stop touching it.

■ A different frequency in each ear
Each ear gets a slightly different pitch, so please use headphones.
For speakers, switch to the isochronic pulse in Details.

■ No network
Nothing is collected and nothing is sent. The sounds you make stay on your device.

———
The free version plays for five minutes at a time. One purchase removes the limit.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Play without limits | $2.99 | one-time |


## Is Ototsuzuku safe?

Not enough ratings yet to assess Ototsuzuku.

## Is Ototsuzuku legit?

Ototsuzuku - 音つづく has limited verification signals. The AppsHunter Legitimacy Score for Ototsuzuku is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-09-29

Language fixes. English is now shown in countries where Japanese is not set.

### 1.0 — 2026-09-25

No release notes.

## More apps by shigeto nakawaka

- [Etoku - 暗記フラッシュカード](https://appshunter.io/ios/app/etoku/id6760871802)

All apps by shigeto nakawaka: https://appshunter.io/developer/368421363

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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 2026-10-22.*