Supported Features
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VoiceOver
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Voice Control
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Larger Text
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Dark Interface
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Sufficient Contrast
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Reduced Motion
Breathing Coach - Nostril
Breathe Better, Sleep Deeper
Free · In‑App Purchases
Track your breathing overnight with on-device AI. Three independent classifiers analyze every breath while you sleep. No audio uploaded, ever.
You breathe 20,000 times a day. Most of them through your mouth, without even knowing it.
Mouth breathing leads to poor sleep, low energy, dry mouth, and anxiety. Nostril helps you switch to nasal breathing with daily tests, guided exercises, and overnight sleep tracking so you can feel the difference in days, not months.
MEASURE YOUR BREATHING FITNESS
Take the Control Pause test to measure your body's CO₂ tolerance, the most reliable marker of how well you breathe. Track your score over time and watch it climb as your habits improve.
TRACK YOUR SLEEP (Premium)
Place your phone on the nightstand and let Nostril listen overnight. Wake up to a clear breakdown of nasal vs. mouth breathing, snoring episodes, and trends across nights. All audio is processed entirely on your device. Nothing is ever recorded, stored, or uploaded.
RESET IN 60 SECONDS
Feeling stressed? The guided Reset session walks you through 60 seconds of slow nasal breathing with gentle haptics and visual cues. Inhale 4 seconds, exhale 6. Log your mood after each session to see the pattern.
SEE YOUR PROGRESS (Premium)
Charts, streaks, and a year-long heatmap show how far you've come. Dive into detailed sleep analytics, weekly compliance scores, and Control Pause trends, all in one place.
BUILD THE HABIT
Set daily check-in reminders that ask one simple question: are you breathing through your nose right now? Over time, awareness becomes automatic.
PERSONALIZED FROM DAY ONE
A quick assessment during setup analyzes your breathing patterns, sleep quality, and symptoms to give you a personal breathing score and focus areas tailored to you.
PRIVACY FIRST
Sleep tracking uses on-device audio analysis with multiple AI layers. No audio is saved. No data leaves your phone. Ever.
Terms of Use (EULA): https://deadpixel-studio.com/en/terms_of_use
Privacy Policy: https://deadpixel-studio.com/en/privacy_policy
Our biggest update ever.
NOW ON IPAD
Nostril is built for the big screen. Every feature, in portrait and landscape, with your progress right alongside you.
BUILT FOR EVERYONE
Full VoiceOver support, including spoken summaries of every chart. Text scales to the largest accessibility sizes without a word getting cut off. Reduce Motion and Voice Control are respected throughout, and every colour now meets WCAG AA contrast.
FOUR WAYS TO BREATHE
Belly, Box, 4-7-8 and Coherent breathing, each guided step by step, with its own timer, written tutorial and reminders.
Thank you for all of your feedback. It shaped this release.
The developer, DeadPixel Studio UG (haftungsbeschrankt), 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 Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- DeadPixel Studio UG (haftungsbeschrankt)
- Size
- 31.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Italian, Portuguese, Simplified Chinese, Spanish
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Lifetime $49.99
- Annual Premium $29.99
- Weekly Premium $4.99
- Copyright
- © 2026, DeadPixel Studio UG
