CalmNest: Box Breathing App
Breathing Exercise & Sleep Aid
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Lying awake scrolling your phone at night?
CalmNest guides you to sleep naturally with science-backed breathing techniques.
— 3 BREATHING METHODS —
Rhythmic Breathing: Actively follow the on-screen slider to build a steady breathing rhythm that calms your mind.
Box Breathing: Inhale 4s → Hold 4s → Exhale 4s → Hold 4s. A proven pattern used by athletes and military to reduce stress.
Relaxation Breathing: Breathe in naturally, exhale slowly, and sink into deep relaxation.
— SLEEP INSIGHTS —
Understand your sleep patterns with 7-day analytics:
- Sleep onset trend (actual & 3-day moving average)
- Breathing method effectiveness comparison
- Weekly sleep pattern analysis
- Sleep quality score & consistency rating
- Personalized optimal sleep time recommendation
— SMART WAKE ALARM —
Set a wake time and your session ends automatically. Choose from 3 alarm sounds with preview support.
— LIVE MONITORING —
Track your session in real time through Dynamic Island and Lock Screen widgets. See elapsed time, breathing count, and helpful sleep tips at a glance.
— CUSTOMIZABLE —
- Auto brightness adjustment (min/max settings)
- Background music & breathing guide sounds
- Adjustable slider size (short/medium/long)
- Supports English, Korean, Japanese
good bye. brain-rot.
Start your journey to better sleep tonight with CalmNest.
— Subscription Details —
• Premium (yearly auto-renewable subscription)
• Length: 1 year, automatically renewed every year
• Price: see in-app pricing for your region
• Payment is charged to your Apple ID at confirmation of purchase
• Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period
• Subscriptions may be managed and auto-renewal turned off in your Account Settings on the App Store
Terms of Use (EULA): https://www.pentarab.com/calmnest/terms
Privacy Policy: https://www.pentarab.com/calmnest/privacy
Ratings & Reviews
Minor bug fixes.
The developer, Pentarab, 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
- Seller
- Pentarab
- Size
- 23.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 3 more
- English, Japanese, Korean, Simplified Chinese
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Weekly Premium $3.99
- CalmNest Premium Yearly $29.99
- Copyright
- © Copyright All reserved Pentarab