simple apnea

simple apnea — train your breath-hold, distraction-free.

simple apnea is a clean, minimalist breath-hold trainer for freedivers,
spearfishers, and anyone practicing static apnea. No accounts, no ads, no
clutter — just a high-contrast timer that stays out of your way while you're
under pressure.

TRAINING TABLES BUILT ON REAL FREEDIVING METHODOLOGY
• CO2 Table — constant holds with shrinking rest to build carbon dioxide
(hypercapnia) tolerance
• O2 Table — growing holds with fixed rest to train low-oxygen (hypoxia)
adaptation
• No-Contraction — hold until your first diaphragm contraction, log it, stop
• Wonka Table — hold a controlled distance past the first contraction
• FRC Table — short holds after a passive exhale that mimic depth compression
• Pyramid — ramp up to a peak hold, then ride back down
• Custom — build your own hold/rest rotation and save it as a reusable preset

EVERYTHING YOU NEED TO TRAIN
• Max Hold sessions — 1–3 fully relaxed maximum holds with long guided rest
• Square Breathing — box breathing warm-ups and recovery
• Personal best tracking — quick PB updates and automatic new-PB detection
• Progress graphs — see how often you train and watch your PB climb
• Audio & vibration cues — choose when you're prompted during holds
• Built-in safety info — educational guidance and blackout-safety reminders on
every table. Never train solo in water.

SIMPLE BY DESIGN
• Offline-first — works with no internet, no account, no data collection
• Lightweight and battery-friendly
• Clean, high-contrast interface built for focus

Breathe slow. Dive deep.

Important: static apnea requires proper instruction. Take a certified
freediving course (AIDA, Molchanovs, SSI, PADI) and never practice holds in
water without a trained buddy. Consult a physician before starting breath-hold
training.