# Tetra – Box Breathing — Breathe deep. Feel better.

> Guided box breathing exercises with haptic feedback for stress reduction and focus. (iPhone/iPad app by Eric Seitz.)

- Source: https://appshunter.io/ios/app/tetra-box-breathing/id6753811461 (this page in markdown: same URL + `.md`)
- Developer: [Eric Seitz](https://appshunter.io/developer/1845132163)
- Category: Health & Fitness, Productivity
- Price: Free (on sale, was $1.99)
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2025-10-17
- Data updated: 2026-07-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/tetra-box-breathing/id6753811461/reviews.md

## What is Tetra?

Box Breathing helps you slow down, focus, and reset—guided entirely by gentle haptic cues.

Features
• Adjustable rhythm (3–6 seconds per phase)
• Subtle haptic feedback for inhale, hold, exhale, hold
• Minimal, distraction-free design inspired by calm technology
• Works in Silent Mode — feel the rhythm without sound
• One-tap start for quick breathing sessions anytime

Why it matters
Box breathing is a proven technique used by athletes, pilots, and mindfulness practitioners to lower stress and sharpen focus. A few calm cycles can reset your nervous system and improve clarity.

One-time purchase. No sign-ups. No noise. Just breathe.

## Key features

- Adjustable breathing rhythm
- Subtle haptic feedback
- Minimalist design
- Silent mode compatibility
- One-tap start

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/tetra-box-breathing/id6753811461/reviews.md

### 5/5 — Simple to use

*2025-10-17*

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.

## Frequently asked questions about Tetra

### 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.

## Version history (last 1 release)

### 1.0 — 2025-10-17

No release notes.

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## More apps by Eric Seitz

- [EMOM Workout Timer](https://appshunter.io/ios/app/emom-workout-timer/id6757962567)

All apps by Eric Seitz: https://appshunter.io/developer/1845132163

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-02.*