Supported Features
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VoiceOver
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Voice Control
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Differentiate Without Color Alone
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Reduced Motion
Yoinemu - Sleep & Ambient
Japanese ambient sleep sounds
Only for iPhone
Free
iPhone
Yoinemu is a minimalist ambient sound app for falling asleep. Designed in Japan, completely free, with no ads and no tracking. Just open it, choose a sound, and let yourself drift off.
WHY YOINEMU
Most sleep apps keep adding features. Yoinemu does the opposite. It does one thing — help you fall asleep — and removes everything that gets in the way. Dark, quiet artwork made for nighttime. No sign-up. No subscription. No noise.
A SLOWING BREATH
On the player, a quiet animation breathes a little slower over time, gently guiding your own breathing down toward sleep. You don't have to follow it. It's just there, in the background, like a calm presence in the dark.
15 CAREFULLY CURATED SOUNDS, ACROSS 5 CATEGORIES
Rain
- Noki no Ame — rain on the eaves
- Doshaburi — heavy downpour
- Yoru no Kosame — light rain at night
- Mado Utsu Ame — rain on the window
Water
- Kawa no Se — a river's shallows
- Yose-nami — waves rolling ashore
- Mizuumi no Fuchi — the edge of a lake
Forest
- Yoru no Mori — forest at night
- Kozue no Kaze — wind in the treetops
- Ake no Mori — forest at dawn
Fire
- Takibi — a campfire
- Andon — the glow of an andon lamp
Noise
- Hakuu — white noise
- Yaki — pink noise
- Jinari — brown noise
Each sound keeps its Japanese name, with a short English description so you always know what you're hearing.
FALL ASLEEP, THEN STOP GENTLY
Set a sleep timer and choose a gentle fade. Instead of cutting off abruptly, the sound eases away along a soft S-curve — "stop gently over 10 minutes" — so nothing jolts you awake just as you're drifting off.
QUIET BY DESIGN
- Designed for falling asleep, not for staring at a screen
- Dark artwork that won't light up your room
- Available in English and Japanese
- No accounts, no ads, no tracking
- Every sound is credited to its creator in the app
INDEPENDENT, AND TRANSPARENT
Yoinemu is built and maintained by a single independent developer in Japan. Privacy Policy and Terms of Service are available in both English and Japanese.
SUPPORT
Inquiries: Japanese preferred. English supported on a best-effort basis. support@yoinemu.app
FROM JAPAN, WITH CARE
Yoinemu is shaped by a Japanese sense of "yoi no nemuri" — the sleep of early evening. Its name, its Japanese sound titles, and its pared-down artwork all come from that quiet world. We hope it helps you end your day a little more gently.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
More of the app now appears in English, including tab labels and several screens.
The developer, Takuya Ozu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Takuya Ozu
- Size
- 82.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Takuya Ozu