Halcyon: Deep sleep sounds
White Noise, Rain & Stories
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Halcyon helps you fall asleep, relax, and focus with soothing sounds you can mix your own way — plus guided wind-downs, narrated sleep stories, and breathing exercises to quiet a busy mind.
MIX YOUR PERFECT SOUND
Layer any of 19 high-quality sounds and set each one's volume to build the exact soundscape you like. Rain over a distant campfire. Ocean waves under soft wind. A fan with gentle night crickets. Save your favorite mixes and bring them back with one tap.
• Nature — rain, wind, campfire, night, storm, forest birds
• Water — ocean waves, stream, waterfall
• Noise — white, pink, and brown noise
• Comfort & ambience — fan, café, train, heartbeat
• Frequencies — delta, theta, and alpha tones (headphones recommended)
GUIDED SLEEP & CALM
• 10 sleep and relaxation guides — wind down, body scan, letting go, and more
• 5 original sleep stories written to drift you off, narrated in a choice of calm, natural voices
• Box, 4-7-8, and coherent breathing exercises to slow your breath and settle your mind
BUILT FOR SLEEP
• Sleep timer that fades gently to silence — it won't jolt you awake
• Background playback keeps sounds going with the screen off
• Lock-screen and Control Center controls
• A calm, dark interface designed for the end of the day
• Adaptive soundscapes that softly drift over time so the sound never feels static
HALCYON PREMIUM
Unlock the full experience with a subscription:
• All 19 sounds, with unlimited layers in a single mix
• Save as many mixes as you like
• All 10 sleep guides and all 5 sleep stories
• Read-aloud narration in a choice of four calm, natural voices
• Adaptive soundscapes across the whole library
Start with a 7-day free trial on the annual plan. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends; manage or cancel anytime in your App Store settings. Payment is charged to your Apple ID. Any unused portion of a free trial is forfeited when you buy a subscription.
Terms: https://bogtsi.xyz/noctura/terms
Privacy: https://bogtsi.xyz/noctura/privacy
Sweet dreams.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Rate Halcyon from Settings. If we ever ask for a review, it is only after you finish a breathing exercise — never while you are drifting off.
• Under-the-hood updates and stability improvements.
Same sounds, stories, guides and breathing exercises you already know.
The developer, Bogdan Tsiganiuk, 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:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Bogdan Tsiganiuk
- Size
- 179.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 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 and 9 more
- English, Arabic, French, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Halcyon Premium (Annual) $39.99
- Halcyon Premium (Monthly) $4.99
- Copyright
- © 2026 Bogdan Tsiganiuk