Apnio

Apnio is your personal freediving and apnea training companion, designed for beginners and experienced freedivers alike.

SCIENTIFIC TRAINING METHODS

Train with proven techniques used by professional freedivers:

• O2 Tables — Build oxygen tolerance with progressive breath-hold intervals

• CO2 Tables — Increase CO2 tolerance with fixed holds and decreasing rest

• Breath Holding Test — Track and improve your personal best breath-hold time

• Square Breathing — Box breathing exercises for relaxation and focus

PERSONALIZED TRAINING PLANS

Get custom training plans tailored to your skill level and goals. Apnio adapts to your progress so you improve at your own pace — whether you're just starting out or preparing for competitive freediving.

DRY & POOL MODES

Switch between Dry mode for training at home and Pool mode for water sessions. Pool mode enables Water Lock on Apple Watch to prevent accidental touches underwater.

APPLE WATCH COMPANION

Train directly from your wrist without your phone. The Apple Watch app provides:

• Full training controls and real-time countdown timers

• Heart rate monitoring during breath holds

• Haptic feedback for phase transitions

• Water Lock support for pool sessions

TRACK YOUR PROGRESS

• View detailed session history with times, rounds, and heart rate data

• Weekly performance analytics and progress charts

• Personal best tracking for breath-hold tests

• Share training results with beautiful shareable cards

HEART RATE MONITORING

Monitor your heart rate in real-time during training sessions. See average and max BPM for each session, and track how your body adapts over time.

APPLE HEALTH INTEGRATION

Sync your training sessions and heart rate data to Apple Health for a complete view of your fitness journey.

FEATURES

• 4 scientifically-backed training modes

• Personalized weekly training plans

• Real-time heart rate monitoring

• Apple Watch companion app

• Dry and Pool training modes

• Detailed session history and analytics

• Progress tracking with charts

• Shareable training result cards

• Custom training tables

• Audio and haptic coaching cues

Start your freediving journey today with Apnio.

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Privacy Policy: https://apnio.health/privacy-policy