Idle Spirits
40Hz Brain Boost & Spirit Idle
Free · Designed for iPad. Not verified for macOS.
Now smoother and optimized for long sessions! 40Hz healing BGM, 80+ nature sounds and 57 spirits to collect. A relaxing idle block-breaker to watch and unwind to.
Casual idle healing game with 40Hz brain-boosting BGM, immersive spatial audio, and spirit collection.
◆ 40Hz BGM for Brain Activation
Features BGM containing 40Hz frequency, known to support brain health. Just listen to the meditation music while idling to relax and potentially boost brain function.
◆ Immersive Spatial Audio
80+ nature sounds with AVAudioEngine-powered reverb and spatial panning. Hear birds from the left, streams from the right. Each of the 10 stages has its own unique sound theme - forest, night, ocean, sakura, autumn, and rain.
◆ Simple Idle Gameplay
No complex controls needed. Just tap the screen to collect spirits. Perfect for short breaks or bedtime relaxation.
◆ 57 Spirit Collection
Meet diverse spirits across 10 beautiful stages, from forest fairies to cosmic beings. Register them in your collection book and enjoy tap effects.
◆ Healing Sound Features
- 40Hz Meditation BGM: Frequency known for brain benefits
- Healing Forest BGM: 4 soothing tracks
- Overtone Bath: Ultimate relaxation experience
- Sleep Timer: Perfect for bedtime
- Ambient Soundscape: Nature sounds play between hits
◆ Two Modes
[Chill Mode]
Main mode for relaxed spirit collecting. Meet 57 spirits across 10 beautiful stages.
[Survival Mode]
Special mode unlocked after completing Chill Mode. Thrilling dash-to-survive gameplay.
◆ Stages
- Healing Forest: Meet spirits in lush greenery
- Bird Paradise: A space where beautiful birds dance
- Firefly Night: In the midst of magical lights
- Cherry Blossom Spring: Under falling petals
- Autumn Twilight: A world dyed in sunset
- Water Paradise: By refreshing waters
- Crystal Cave: In mystical sparkles
- Elemental Altar: Where four elements meet
- Otherworldly Gate: A door to unknown realms
- Rainy Garden: A fresh garden washed by the rain
Complete your spirit collection while listening to 40Hz BGM.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
v1.50 - Smoother Performance
◆ Performance Improvements
- Optimized internals so the game stays smooth even during long sessions
- Reworked cleanup of spirits and effects to stop memory waste
- More stable frame rate for smoother ball and trail motion
◆ Cleaner Look
- Tidied up small decorations on the edges so you can focus on the calming world
◆ More
- Minor tweaks and stability improvements
Enjoy your relaxing idle time with the spirits.
The developer, KeiK LLC, 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:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- KEIK, LIMITED LIABILITY COMPANY
- Size
- 106.3 MB
- Category
- Casual
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 KEIK, LLC