CalmNest: Box Breathing App
4-7-8 Breathwork & 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
Performance improvements and 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
- 23.8 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 $2.99
- CalmNest Premium (Lifetime) $39.99
- CalmNest Premium Yearly $19.99
- Copyright
- © Copyright All reserved Pentarab