The physiological sigh — also called cyclic sighing — is a double inhale through the nose followed by a long exhale through the mouth. It is a specific, well-defined breathing pattern, and an app designed specifically around it is meaningfully different from a general meditation or breathwork app that includes it as one exercise among many.
This article covers what to look for in a dedicated physiological sigh app, and how Cyclic Sighing addresses each area.
The physiological sigh consists of:
It is also referred to as cyclic sighing, double inhale breathing, and two-inhale breathing. All describe the same pattern.
The physiological sigh is a general wellness practice. It is not a medical treatment for any condition.
The double inhale is the defining feature of the physiological sigh — the first full breath followed immediately by a shorter second inhale. An app should guide both inhales distinctly, making it clear when the first breath ends and the second top-off begins. Without guidance, beginners often combine the two into a single breath and miss the technique entirely.
The exhale is meant to be roughly twice the length of the two inhales combined. A good app provides a clear visual or audio cue for how long the exhale should be, rather than leaving the practitioner to guess or count manually.
Voice guidance allows eyes-closed practice without needing to watch the screen — which is particularly valuable for a calming technique intended to reduce visual stimulation.
Subtle haptics marking phase transitions (first inhale, second inhale, exhale) allow the practitioner to follow the breath without opening their eyes.
The ability to fit a session into whatever gap is available — 90 seconds, 5 minutes, or longer — makes the practice more sustainable as a daily habit.
A streak and session history view makes consistency visible and motivating. Seeing a sustained practice record supports habit formation.
The physiological sigh is specifically studied in relation to mood. An app that captures mood before and after each session lets you observe whether your own practice and mood tend to move together over time.
The physiological sigh is most useful in moments of stress or overwhelm — which don't always come with a reliable internet connection. An app that works fully offline with no login removes friction at exactly the moment the practice is most needed.
For a focused single-technique practice, a one-time purchase model is a better fit than an ongoing subscription.
Cyclic Sighing is a dedicated physiological sigh app for iPhone, built specifically around the double inhale, long exhale pattern.
| Feature | Cyclic Sighing |
|---|---|
| Guided double inhale specifically | ✓ First inhale and second inhale guided separately |
| Long exhale timing | ✓ Exhale guided at ~2× the inhale length |
| Optional voice guidance | ✓ Toggle on for eyes-closed practice |
| Haptic feedback | ✓ Subtle haptics at each phase transition |
| Adjustable session length | ✓ Custom timing — any session length |
| Multiple breathing patterns | ✓ Calm, Relax, Rest |
| Streak & session tracking | ✓ Daily streaks + Skip Day protection |
| Mood check-ins | ✓ Pre- and post-session, tied to every session |
| Mood insights | ✓ Monthly calendar + yearly overview |
| Works offline | ✓ Fully offline — no internet required |
| No account required | ✓ No sign-up, no login |
| One-time purchase | ✓ $9.99 one-time Pro — no subscription |
| Apple Health sync | ✓ Optional Mindfulness minutes |
| Home screen widgets | ✓ Home Screen, Lock Screen, Live Activity |
| Smart reminders | ✓ Time-based and location-based |
The physiological sigh and the Cyclic Sighing app are intended for general wellness purposes only. They do not provide medical advice, diagnosis, or treatment. Consult your healthcare provider before starting any breathing practice if you have a health condition.
Cyclic Sighing — dedicated physiological sigh app for iPhone. Free to download, one-time $9.99 Pro, no subscription.
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