Breath478 is a minimalist breathing-training app. Built around the classic 4-7-8 breathing method, a flowing nebula animation guides you to inhale, hold and exhale, while it reads heart rate and heart-rate variability (HRV) from your Apple Watch before and after — so you can see the change each session brings.
Features
Multiple patterns
Built-in 4-7-8, 4-4-6, 4-8-8 and 4-8-10 patterns for every situation.
Nebula guidance
No rigid circle scaling — the rhythm flows with your recent breathing rate.
HRV before & after
See your HRV change right after a session — calm, quantified.
Trends & history
View HRV trends from one month to several years, and revisit every session.
Home-screen widget
Glance at today's state and start a session anytime.
Health integration
Sessions can be saved as Mindfulness, in step with Apple Health.
Who it's for
Anyone who wants to settle before sleep, steady their mood under stress, or see relaxation in objective numbers. No account, no network — just open and breathe.
Requirements
iOS 17 or later. HRV / heart-rate features need an Apple Watch and Health authorization.