4-6 · A coach for resonance breathing
foursix.app
LaunchIndex first observed 4-6 · A coach for resonance breathing (foursix.app) live on 19 September 2026. View its launch screenshot, category, and verification evidence.
A launch record built from evidence.
4-6 · A coach for resonance breathing (foursix.app) was first observed live on 19 September 2026.
Foursix.app offers a breathing-rate coaching app that measures heart-rate variability and provides guidance after each session. It markets as a non-medical HRV coach available for iPhone with a free access tier and paid options.
Its profile is classified as Saas within Health / Health and wellness.
What the launch signal contained.
- First observed live
- Previous state
- No prior non-live observation
- Last verified
- Canonical host
- foursix.app
- Category
- Health / Health and wellness
- Website type
- Saas
- Observed title
- 4-6 · A coach for resonance breathing
- Observed description
- Finds the breathing rate your heart responds to most strongly, paces it by sound, and after every session tells you what to change.
- Detected technologies
- None detected
- Screenshot captured
- Evidence source
- Browser observation · Local
- Evidence confidence
- 90%
- HTTP status
- 200
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