Nervous System Calmer: Breathe

Nervous System Calmer guides slow, research-based breathing exercises that help your body move from stress to calm. One tap on the circle starts a one-minute cyclic sigh.

FREE
- Calm now: one minute of cyclic sighing from the home screen, an app shortcut or a quick settings tile
- Four techniques: cyclic sighing, resonance breathing, also called coherent breathing (4.5-7 breaths per minute), extended exhale, box breathing
- 1, 3, 5 or 10 minutes, guided by a breathing circle, soft tones and vibration, also with the screen locked
- Evening: 10 minutes of extended exhale with a dark screen and silence at the end
- Tension before and after (0-10) and your practice over the last 7 days
- A daily reminder at the time you choose

PLUS EDITION (one-time purchase, no subscription; try it in three free sessions)
- Programs: Basics, 28 days of calm, Before sleep, Morning
- Your own rhythm, for example 4-7-8
- Muscle relaxation guided by voice
- Heart rate with the camera before and after a session, and a 10-minute test to find your breathing pace
- Statistics with charts and CSV export

RESEARCH
In a Stanford study (Balban et al., Cell Reports Medicine, 2023), five minutes of cyclic sighing a day improved mood and reduced physiological arousal more than mindfulness meditation. Slow breathing at around six breaths per minute increases heart rate variability, a marker of the calming branch of the nervous system (Lehrer and Gevirtz, 2014; Zaccaro et al., 2018).

PRIVACY
No internet permission, no accounts, no ads, no analytics. Everything stays on your phone. Camera images are not saved.

Languages: English, Polish, Spanish, Portuguese, German, French.

Heart rate measurement needs a rear camera with a flash. The result is approximate.

Nervous System Calmer is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. If you have health concerns, consult a qualified healthcare professional.

Recent changes:
Maintenance update: a newer version of one of the Android libraries the app is built with. Features and privacy are unchanged.