STAmaster - Apnea Trainer

STAmaster is the ultimate static apnea training app for freedivers, spearfishers, and breath-hold enthusiasts. Whether you're just starting out or pushing for a new personal best, STAmaster gives you the tools to train smarter and safer.

PRECISION TIMER
Track your static apnea holds with a dedicated breathe-up and hold timer. See your time in real-time with customizable fonts and display styles. Get voice coaching cues and haptic feedback to stay focused without looking at your screen.

CO2 & O2 TRAINING TABLES
Follow classic CO2 tolerance and O2 endurance tables used by competitive freedivers. Pick from a library of proven tables or build your own custom intervals. The table session engine guides you through each round with voice prompts and recovery timers.

HEART RATE MONITORING
Connect any Bluetooth heart rate strap (Polar, Garmin, Wahoo, and more) for live BPM tracking during your holds. Set heart rate alerts so you know when to surface. Review heart rate charts in your session summaries.

SMART PROGRESS TRACKING
Every session is recorded with detailed stats — hold times, averages, personal bests, and trends over time. The progress dashboard shows your improvement with charts for hold duration, CO2 tolerance, training volume, and PB timeline.

AI COACHING
Get personalized training plans generated based on your experience level and personal bests. The rule-based coach analyzes your sessions and provides actionable tips to improve your technique and break through plateaus.

WORKOUT LIBRARY
Complement your apnea training with guided breathwork, yoga, meditation, and cardio sessions. Each workout is designed to support your breath-hold performance.

SAFETY FIRST
Built-in safety checks for wet training environments. Emergency contact settings. Heart rate alerts during holds. STAmaster takes your safety seriously.

KEY FEATURES
• Static apnea timer with breathe-up and recovery phases
• CO2 and O2 training tables with custom builder
• Bluetooth heart rate monitor support
• Health Connect integration for biometric data
• Session history with detailed analytics
• Progress dashboard with charts and trends
• AI-generated 4-week training plans
• Voice coaching with multiple styles
• Haptic feedback cues
• Guided breathwork, yoga, meditation, and cardio
• Dark theme optimized for low-light training
• Completely offline — your data stays on your device

DESIGNED FOR
• Freedivers training static apnea
• Spearfishers improving breath-hold capacity
• Competitive apnea athletes
• Swimmers and surfers building underwater confidence
• Anyone curious about breath-hold training

Your data never leaves your device. No account required. No ads. Just train.