# Oxigen > Oxigen is a breathing exercise app for iPhone (Android coming) that builds a 7-day plan from a short quiz and guides 20 techniques, each shown with its evidence grade. Oxigen (App Store name: “Oxigen: Breathing Exercises”) is a general-wellness app for relaxing, managing everyday stress, winding down for sleep and focus. Oxigen is a wellness app, not a medical device. It does not diagnose, treat, cure, or prevent any medical condition. If you have a health condition or are pregnant, talk to your doctor before starting, and keep following your care plan. ## Key facts - Platform: iPhone, on the App Store (https://apps.apple.com/us/app/oxigen-breathing-exercises/id6831796117). Android version in progress. - Price: free to download; free tier has 8 foundation techniques, Starter days 1–3, 2 programs, every quick start and the full guided session. Oxigen Premium: $44.99/year with a 7-day free trial, or $7.99/month (US prices). - Plan: a 10-question quiz (goal, situations, stress, experience, health check, minutes, time of day) builds a 7-day Starter plan. - Guidance: a glowing glass orb that fills on the in-breath and drains on the out-breath, a rhythm ring, haptics and optional sound. - Evidence grades: A Well studied, B Studied, C Early research, T Traditional. Benefit wording comes only from the cited studies. - Safety: a health check hides unsuitable techniques and caps breath holds; intense techniques need a readiness check and a shorter first run; “I feel unwell” stops any session. - Privacy: no account; health answers, moods and sessions stay on the phone; Apple Health data is never uploaded; anonymous analytics can be turned off. - Languages: 21. Accessibility: VoiceOver, Reduce Motion, large Dynamic Type. ## Pages - [Home](https://oxigen.thunder.red/): What Oxigen does, a live breathing demo, the 7-day plan, evidence, safety, privacy, pricing and FAQ. - [Breathing techniques](https://oxigen.thunder.red/techniques/): All 20 techniques compared by effect, rhythm, evidence grade and level. - [Support](https://oxigen.thunder.red/support/): Cancelling or restoring a subscription, refunds, analytics, exporting or deleting data. - [Privacy policy](https://oxigen.thunder.red/privacy/): What stays on the phone, what leaves it (Google Analytics for Firebase, Sentry EU, RevenueCat) and your rights. - [Terms of use](https://oxigen.thunder.red/terms/): Wellness not medical care, safe use, subscriptions and App Store terms. ## Techniques - [Extended Exhale](https://oxigen.thunder.red/techniques/extended-exhale-breathing/): slow nasal breathing where the out-breath is longer than the in-breath. Calming; Studied (grade B); free. - [Belly Breathing (Diaphragmatic Breathing)](https://oxigen.thunder.red/techniques/belly-breathing/): breathing so the belly rises on the in-breath and the chest stays mostly still. Calming; Studied (grade B); free. - [Cyclic Sighing](https://oxigen.thunder.red/techniques/cyclic-sighing/): two in-breaths through the nose (a full one, then a short top-up), then a long, slow out-breath through the mouth. Calming; Studied (grade B); free. - [Box Breathing](https://oxigen.thunder.red/techniques/box-breathing/): a breathing rhythm with four equal sides: in, hold, out, hold. Balancing; Early research (grade C); free. - [Coherent Breathing (Resonance Breathing)](https://oxigen.thunder.red/techniques/coherent-breathing/): smooth, even breathing at about six breaths per minute, roughly 5 seconds in and 5 seconds out. Balancing; Well studied (grade A); free. - [4-7-8 Breathing](https://oxigen.thunder.red/techniques/4-7-8-breathing/): breathing in for 4, holding for 7 and breathing out for 8, a pattern popularized by Dr Andrew Weil. Sedating; Early research (grade C); free. - [Pursed-Lip Breathing](https://oxigen.thunder.red/techniques/pursed-lip-breathing/): breathing in through the nose and out slowly through lips pursed as if cooling soup. Calming; Studied (grade B); free. - [Energizing Breath](https://oxigen.thunder.red/techniques/energizing-breath/): a gentle wake-up: longer, fuller in-breaths and shorter out-breaths, through the nose, sitting tall. Activating; Traditional (grade T); free. - [Humming Breath (Bhramari)](https://oxigen.thunder.red/techniques/humming-breath-bhramari/): a long, low hum on every out-breath. Calming; Early research (grade C); Premium. - [Alternate Nostril Breathing (Nadi Shodhana)](https://oxigen.thunder.red/techniques/alternate-nostril-breathing/): breathing through one nostril at a time, switching sides. Balancing; Early research (grade C); Premium. - [Mindful Breathing (Anapanasati)](https://oxigen.thunder.red/techniques/mindful-breathing/): noticing the natural breath without counting or pacing, and coming back when the mind wanders. Balancing; Early research (grade C); Premium. - [Kapalabhati (Skull-Shining Breath)](https://oxigen.thunder.red/techniques/kapalabhati/): a traditional yogic practice of short, sharp exhales driven by the belly, with passive inhales. Activating; Early research (grade C); Premium. - [Power Breathing](https://oxigen.thunder.red/techniques/power-breathing/): rounds of deep, quick breaths, each followed by holding the breath out until you feel the urge to breathe, then a recovery breath. Activating; Early research (grade C); Premium. - [Ocean Breath (Ujjayi)](https://oxigen.thunder.red/techniques/ocean-breath-ujjayi/): nasal breathing with a slight narrowing of the throat that makes a soft ocean sound, mostly used during yoga. Balancing; Early research (grade C); Premium. - [Lion's Breath](https://oxigen.thunder.red/techniques/lions-breath/): breathing in through the nose, then opening the mouth wide, tongue out, and breathing out with a “haaa”. Activating; Traditional (grade T); Premium. - [Cooling Breath (Sitali)](https://oxigen.thunder.red/techniques/cooling-breath-sitali/): breathing in through a curled tongue (or through the teeth, called sitkari, if you can’t curl it) and out through the nose. Calming; Early research (grade C); Premium. - [Left-Nostril Breathing (Chandra Bhedana)](https://oxigen.thunder.red/techniques/left-nostril-breathing/): breathing in through the left nostril and out through the right. Calming; Early research (grade C); Premium. - [Right-Nostril Breathing (Surya Bhedana)](https://oxigen.thunder.red/techniques/right-nostril-breathing/): breathing in through the right nostril and out through the left. Activating; Early research (grade C); Premium. - [Bellows Breath (Bhastrika)](https://oxigen.thunder.red/techniques/bellows-breath-bhastrika/): forceful, even in-breaths and out-breaths through the nose, an advanced traditional practice. Activating; Traditional (grade T); Premium. - [Light Nasal Breathing](https://oxigen.thunder.red/techniques/light-nasal-breathing/): breathing retraining: nose only, with softer and smaller breaths and a little air hunger for a few minutes, then rest. Calming; Studied (grade B); Premium. ## Contact - Email: oxigen@thunder.red ## Optional - [Full text for language models](https://oxigen.thunder.red/llms-full.txt): Technique steps, evidence and sources, safety rules and the FAQ in plain text.