Simple to use
Very simple to use. Not fancy, but that’s the point. I use it for 2-3 mins in the morning and it helps me stay focused.
Free
Lowest price: $0.99 a year ago (-%)
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About
This app guides you through box breathing exercises using subtle haptic feedback. It helps you slow down, focus, and reset your nervous system with a distraction-free design. Enjoy quick sessions anytime without sound or sign-ups.
✓Adjustable breathing rhythm
✓Subtle haptic feedback
✓Minimalist design
✓Silent mode compatibility
✓One-tap start
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What's New in Tetra
2.1
October 28, 2026
Tetra 2.1 • Tetra now appears in your device's language: Spanish, German, French, Brazilian Portuguese, Italian, Japanese, Simplified Chinese, and Korean, alongside English and Turkish. • A four-part progress indicator and distinct colors for each breathing phase. • Smoother orb animation and a preview of your chosen rhythm before you start. • Rhythm selection directly from the main screen. • Haptic feedback shaped to each phase, with optional audio cues. • Timed sessions that finish the cycle in progress. • Session history grouped by day and optional Apple Health Mindful Minutes logging. • An optional daily reminder and a session summary when you finish. • Clearer settings, improved accessibility, and a dark launch screen. • The Home Screen name is now Tetra.
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FAQ
What is Tetra?
Tetra is a health and fitness app that guides users through box breathing exercises. It utilizes subtle haptic feedback to indicate inhale, hold, exhale, and hold phases, promoting relaxation and focus. The app features a minimalist design and works even in silent mode.
How does Tetra use haptic feedback?
Tetra uses gentle haptic cues to guide each phase of the box breathing cycle: inhale, hold, exhale, and hold. This allows users to follow the rhythm without needing to look at the screen or listen to audio cues.
Can Tetra be used without sound?
Yes, Tetra is designed to work effectively in Silent Mode. The haptic feedback provides the rhythm, making it a discreet tool for breathing exercises anytime, anywhere.
What is the adjustable rhythm in Tetra?
The adjustable rhythm feature in Tetra allows users to customize the duration of each phase of the box breathing cycle, from 3 to 6 seconds per phase. This personalization helps users find a comfortable and effective breathing pattern.
Is Tetra free to use?
Yes, Tetra is available for free. The app is a one-time purchase and does not require any sign-ups or subscriptions.
What devices does Tetra support?
Tetra is currently supported on iPhone devices. It was last updated on October 17, 2025, with version 1.0.
What is the age rating for Tetra?
Tetra has an age rating of 4+, making it suitable for a wide range of users. The app focuses on simple, beneficial breathing techniques.
Does Tetra have ads?
No, Tetra does not contain advertisements. The app is designed to be a distraction-free experience, and it does not have in-app purchases either.
