Mugen Sound

Ultimate focus at your fingertips. Mix nature sounds & color noise freely. Pomodoro and sleep timers in one app. Pro binaural Japanese soundscapes for deep immersion.

■ What is Mugen Sound?

Mugen Sound is the ultimate ambient sound app that enriches your life through the power of sound. Combining cutting-edge audio content with advanced playback technology.

■ Focus, Sleep, and Noise Masking—All with a Single Tap

Mix natural sounds with color noise to create your perfect environment. Automate your routine with custom durations like "25 min focus + 5 min break." Seamless infinite loops that never break immersion.

■ Unique Features

▼ Mix Multiple Sounds Freely Ocean waves + pink noise, forest sounds + brown noise— Create your ideal soundscape with any combination you like.

▼ Set Individual Playback Duration for Each Sound "25 minutes of brown noise for focus, then 5 minutes of ocean waves to refresh." With playlist functionality, customize the duration for each sound. Perfect for Pomodoro Technique or bedtime routines—all automated.

▼ Uninterrupted Immersion Smooth, seamless infinite loops with no jarring transitions. Ambient sounds continue endlessly without interruption.

▼ Professional-Grade Binaural Recording Created in collaboration with okidesign, a sound design company. Recorded in locations across Japan—Hinuma in Ibaraki, Namie in Fukushima, Sakura in Chiba— these binaural recordings make you feel like you're actually there when listening with headphones.

▼ Visual Soundscapes That Soothe Beautiful visualizers (toggle on/off) respond to sound frequencies and move dynamically. Deep immersion through both sight and sound.

■ Rich Feature Set

• Mix multiple sounds freely
• Create playlists with custom durations
• Curated natural sounds and color noise (6 types)
• Fine-tune volume for each sound individually
• Proprietary auto-balancing for consistent volume levels
• Play simultaneously with other apps (layer music + ambient sounds) *Subject to other app specifications
• Pomodoro timer with interval notifications
• Sleep timer (auto-stop)
• Offline playback support
• No sign-up required

■ Perfect For

【Work & Study】 Automate 25-min focus + 5-min refresh (Pomodoro)

【Sleep】 Pink noise + rain sounds + 60-min timer for better sleep

【Noise Masking】 White noise softens ambient noise in cafes or libraries

【Meditation & Yoga】 Natural sounds for moments of calm

【Baby Sleep Aid】 Gentle sounds support peaceful sleep

■ Sound Library

▼ Natural Sounds Collaboration Collection Spring in Sakura, tea fields and streams of Sasama, Lake Toya, Lake Hinuma shoreline... Professional binaural recordings of Japan's authentic soundscapes More sounds coming soon

▼ Complete Color Noise Collection White noise, pink noise, brown noise, gray noise, violet noise, blue noise *Popular choices for focus and sleep

■ Refined Design

Beautiful, intuitive interface that's easy to use. Carefully selected photos that capture the essence of each sound. A calming experience every time you use it.

■ Download Now

Focus. Relaxation. Sleep. Everything you need, right in your hands.

■ Go Premium with Free Trial for Even More Freedom

• Ad-free experience
• Add your own sounds (WAV/MP3/AAC supported) *Compatible with audio files (DRM-free) in iCloud Drive or Files app

Cancel anytime in Settings. Subscription auto-renews after free trial ends. Pricing available in-app.