Hello fellowship of the freedivers ;)
I just wanted to share an app that I am using to do box- or triangle breathing.
the app is called "Breathly" and has a pink multi wave icon
here is the link:
not sure if it is available for apple too.
Individual settings:
inhale times
hold times
exhale times
hold times
and endurance time
male or female voice giving instruction
bell sound
no sound - only visual indication
Positive:
+ very flexible in settings
+ no cost
+ very simple
Negative:
- screen needs to be on - otherwise the app does not continue