Built for Serious Freedivers
Every feature is designed around what matters in the water — precision, calm, and data you can trust.
Training Tables
Build fully customizable CO₂ and O₂ tables. Adjust breathe-up, hold, and recovery durations for every round. Templates get you started in seconds.
Personal Best Mode
A dedicated maximum breath-hold mode with guided setup, breath-up, hold, recovery, and result phases. Your all-time static apnea record is tracked automatically.
Adaptive Coach
Rate each session Easy / Normal / Hard / Fail. After three consecutive Easy sessions the coach suggests loading up; three Hard or Fail sessions trigger a deload recommendation.
Voice Coach
Spoken time announcements during your hold — elapsed, remaining, or hybrid mode. Adjustable frequency (30 s / 60 s) and volume. Audio continues while the screen is locked.
Live Heart Rate & Apple Watch
Real-time BPM from Apple Watch displayed on iPhone and Watch face during every session. Heart rate curves are charted in each logbook entry for post-session analysis.
Logbook & Ocean Log
Every session logged automatically with heart rate, phase breakdown, and notes. Import open-water dives from Garmin dive computers (FIT, UDDF, XML) with depth profiles and GPS maps.
AI Apnea Trainer
Screenshots, ratings, and reviews available on the App Store.