100% Free
Free Breathing & Apnea Tools
Train smarter with free online tools for breath hold and apnea training. Generate personalized training tables and track your progress.
Measure
Two numbers size everything else. Take these first.
Build a session
Three standard table shapes, plus a builder for everything else.
CO2 Table Generator
Fixed hold, shrinking recovery. Three difficulties, matching the BreathHold app exactly.
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O2 Table Generator
Fixed recovery, growing hold. The inverse of a CO2 table.
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Equanimity Table Generator
Ten identical holds sized from your first signal, two minutes apart. Meet the same discomfort ten times and stay relaxed.
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Custom Table Builder
Set every hold and recovery yourself, see the total session length, and share the table as a link.
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Breathe
No holds. Pacing work for before a session or before bed.