Spira Freediving Apnea Trainer

Spira is a freediving and apnea trainer for breath hold training. Build CO2 tables and O2 tables, train static apnea (STA) with a guided breath hold timer, and get a weekly AI training plan calibrated to your personal best. Spira is built for freedivers, spearfishers and breath hold athletes who want more than a stopwatch. CO2 AND O2 TABLES • Generate CO2 tables and O2 tables in seconds, scaled to your max breath hold • Build custom apnea tables and save them for later • Static apnea (STA) training with a guided breath hold timer for every hold and recovery AI APNEA COACH • A weekly freediving training plan calibrated to your personal best • New divers start with an assessment, so the plan fits your real level • Plans adapt as your breath hold time improves TRAIN WITHOUT LOOKING AT YOUR PHONE • Chimes, counted vibrations and a voice countdown guide each hold • Close your eyes, relax and focus on your breathing exercises BUDDY SAFETY MONITOR • Your training buddy follows your session live • Instant alerts when you mark contractions • Friends and teams to train and stay motivated together PROGRESS TRACKING • Every apnea session is saved automatically • Personal records, hold timeline and contraction patterns • Achievements and training streaks • Heart rate and HRV from Health Connect and compatible wearables BUILT FOR REAL TRAINING • Works offline: sessions sync when you're back online • Training reminders so you never miss a breath hold workout • Dark and light mode, available in 22 languages Whether you're preparing for a freediving course, working on lung capacity for spearfishing, surfing or swimming, or chasing a new static apnea PB, Spira gives your breath hold training structure. SAFETY FIRST Never practise breath hold training in or near water without a qualified buddy. Dry static apnea should be done seated or lying down. Spira is a training tool, not a medical device. Consult a doctor if you have any heart or respiratory condition.