Otter Freedive Apnea Trainer

Rain your breath hold the calm, safe way, with an otter as your dive buddy.

Otter Freedive Apnea turns freediving practice into a guided ocean adventure. Measure your comfort baseline, train with CO₂ and O₂ tables built around it, and learn the fundamentals in short lessons, all on dry land and at your own pace. Whether you are a beginner, an experienced freediver, a spearfisher or a scuba diver, you always know what to practice today.

KEY FEATURES

• Adventure Path — Four ocean chapters, from Shallow Start to Return from the Abyss. Short lessons on relaxed breathing, the dive reflex, diaphragm contractions and focus, with a safety guide in every chapter.
• Personalized CO₂ & O₂ Tables — Take the comfort baseline test and your tables adapt to it. Shrinking rests build CO₂ tolerance; longer holds build adaptation to low oxygen.
• Guided, Safer Sessions — Safety check, settling breaths, final breath, hold, then recovery breathing and an effort rating. Log contractions or end any hold early with a tap.
• Progress You Can See — Best hold, session history, monthly calendar and yearly heatmap, plus XP, levels and achievements.
• Daily Quests & Streaks — Daily goals, quests, weekly challenges and Streak Freezes. Spend shells on outfits for your otter in the Otter Shop.
• Widgets, Live Activities & Dynamic Island — Follow your streak and your session from the Home Screen and Lock Screen.
• Relaxation Breathing & Reminders — Guided breathing practice and gentle daily reminders to build the habit.

SAFETY FIRST

Breath-hold training carries a risk of blackout. Practice only on dry land, sitting or lying down in a safe place. Never hold your breath in water, in a bath or while driving, avoid hyperventilation, and stop right away if you feel dizzy or unwell. This app is a training aid, not a medical device, and does not replace a qualified freediving instructor.

[Gold Membership Automatically Renews]
Gold Membership is an auto-renewable subscription that provides access to premium features available within the app.

Available subscription plans may include monthly and annual options. Payment will be charged to your Apple Account upon confirmation of purchase. Your subscription automatically renews unless canceled at least 24 hours before the end of the current subscription period. You can manage or cancel your subscription in your Apple Account settings.

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