Structured breath-hold training for freedivers Measurable gains.
Build calmer, more consistent dry apnea sessions with guided CO2 and O2 tables, custom training plans, voice cues, haptics, session history, and optional heart-rate tracking
Choose Your Table
Start with proven CO2 and O2 table formats, adjust round count, hold time, recovery time, and progression, or create your own saved custom tables.
Train With Guidance
Follow clear hold and recovery timers with optional voice cues, prepare tones, haptics, and a guided warm-up pacer to keep your session focused.
Track Your Progress
Review session history, round-by-round performance, weekly stats, personal bests, hold volume trends, and heart-rate summaries when using a compatible BLE monitor.
Built around empirical data, not around trends
CO2 Tables
O2 Tables
Progress Tracking
Progressive CO2 tolerance training with configurable hold and recovery intervals. Builds the physiological capacity to stay composed under hypercapnic stress.
Fixed-hold, variable-recovery sequences that extend maximum breath-hold duration. Designed around oxygen depletion curves, not generic intervals.
Session logs, personal bests, and trend charts give you the data to self-coach with precision. No coach required to read your own adaptation curve.
Train Smarter. Dive Longer. Stay in Control
Built for Freedivers, Spearos & Breath-Hold Athletes
Training & Performance
CO₂ training tables
O₂ training tables
Fully editable table setup
Save custom training tables
Preview sessions before starting
Guided warm-up routines
Configurable warm-up breaths
Inhale / exhale breathing pacer
Active session timer
Hold & recovery phase tracking
Round progress indicators
Pause & resume sessions anytime
Safety First
Mandatory safety onboarding before training
Persistent in-app safety reminders
High heart-rate alerts during holds
Configurable BPM alert thresholds
Wake-lock support to prevent interruptions
Reliable foreground session service for uninterrupted training
Emergency stop for immediate interruption
Audio, Voice & Haptics
Voice guidance during sessions
Prepare tones before each phase
Haptic feedback for phase changes
Adjustable speech speed
Test tone for heart-rate alerts
Progress & Analytics
Session history tracking
Detailed per-round breakdowns
Session detail views
Personal best tracking
Weekly training statistics
Weekly hold-time totals
Last session summaries
Trend cards & milestone tracking
Hold-volume progression chartse
Smart Reminders & Reliability
Daily training reminders
Weekly reminder scheduling
Reminder recovery after device reboot
Android 13+ notification onboarding
Persistent session notifications
Reliable background session handling
Personalisation & Settings
Audio controls
Haptic controls
Reminder settings
Heart-rate monitor settings
Alert customisation
Light theme support
Configurable training experience
Run your first table today
Free download on Google Play. Requires Android 8.0 or higher. No subscription, no account required to start training.
