Yoinemu - Sleep & Ambient

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.