Free Breathing & Apnea Tools
Train smarter with free online tools for breath hold and apnea training. Generate personalized training tables and track your progress.
Building a CO2 table? Open the free CO2 table generator to enter your reference hold time and review the rounds.
Measure
Two numbers size everything else. Take these first.
Breath Hold Timer
Time your maximum breath hold with a guided preparation phase. Sizes CO2 and O2 tables.
BOLT Score Calculator
Time the control pause — a hold after a normal exhale, stopped at the first urge — and read it against the published bands.
CO2 Baseline Test
Hold to the first urge to breathe, not to your limit. A steadier number than a maximum, and the one equanimity tables are built from.
Build a session
Three standard table shapes, a builder for everything else, and a plan that schedules them.
Training Plan Builder
A 4 or 6 week dry-land schedule from your goal and your max hold, with every CO2 and O2 session sized and the rest days placed.
CO2 Table Generator
Fixed hold, shrinking recovery. Three difficulties, matching the BreathHold app exactly.
O2 Table Generator
Fixed recovery, growing hold. The inverse of a CO2 table.
Equanimity Table Generator
Ten identical holds sized from your first signal, two minutes apart. Meet the same discomfort ten times and stay relaxed.
Custom Table Builder
Set every hold and recovery yourself, see the total session length, and share the table as a link.
Breathe
No holds. Pacing work for before a session or before bed.