BreathHold: Apnea Trainer

CO₂ & O₂ Freediving Tables

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

BreathHold is a dry-land breath-hold training app — an apnea trainer for freedivers, spearfishers, and anyone practising static apnea — on iPhone and Android. Run CO₂ tables, build your own O₂-style tables, record a baseline breath-hold test, and keep every dry-land session in one history. WHAT YOU CAN DO • Run CO₂ tables in Easy, Classic, or Hard — the hold stays steady at 40%, 50%, or 60% of your recorded max, and the rest between rounds gets shorter • Build custom tables: hold times, rest intervals, rounds, and progression, including O₂-style tables where the holds lengthen and the rest stays fixed • Take a max breath-hold test and a CO₂-baseline test — the baseline is what the app uses to suggest your intervals • Follow Equanimity tables, where each hold runs to your first urge-to-breathe signal, or that signal plus 15 or 30 seconds • Practise box, rectangular, full-cycle, and rhythmic breathing • Hear each phase called out with spoken cues, with downloadable voice packs for other languages • Watch instructional videos before you train • Review your session history and test results, and see your best hold • Browse a directory of freediving schools if you want in-water instruction MADE FOR • Freedivers organising dry-land training between sessions in the water • Spearfishers and surfers who practise static apnea on land • Beginners who want a baseline test and a table built from it, rather than a stopwatch • Anyone who practises box breathing and wants the timing handled SAFETY — READ THIS BEFORE YOU TRAIN Never practice breath holding in water alone. Use a trained buddy who understands freediving rescue and watches the diver throughout the attempt. An app or a timer does not replace trained in-water supervision. Do not hyperventilate before a breath hold. Hyperventilating can delay the urge to breathe without preventing oxygen from falling, which increases the risk of loss of consciousness. BreathHold is built for dry-land practice. Stop a session immediately if you feel faint, confused, or unwell. If you have any underlying medical conditions, such as heart or lung disease, high blood pressure, or a history of fainting, consider seeking medical advice before engaging in breath-hold training. FREQUENTLY ASKED QUESTIONS How long until I can hold my breath longer? It differs from person to person, and BreathHold does not promise a specific time. The app records your max breath-hold tests and saves each session, so you can follow your own numbers. What is the difference between a CO₂ table and an O₂ table? A CO₂ table keeps your hold time steady and shortens the rest between rounds. An O₂ table keeps the rest steady and lengthens the hold. Both names describe the interval pattern, not a measurement of your body. BreathHold ships CO₂ tables as presets; O₂-style tables are built in the custom editor. Is breath-hold training safe? Breath-hold practice carries serious risks, including loss of consciousness. Never practise in water alone, never hyperventilate beforehand, and stop if you feel unwell. BreathHold is designed for dry-land sessions, and app guidance does not replace qualified instruction. Why do I get contractions during a hold? During a breath hold, rising carbon dioxide contributes to the increasing urge to breathe, and involuntary breathing movements — contractions — commonly appear during longer holds. Their timing and strength vary between people and between attempts. They are not a reliable gauge of your blood oxygen and not a signal that a fixed amount of safe time remains. Is BreathHold free? Yes, the app is free to download. Box and rectangular breathing, CO₂ tables, the custom table builder, breath-hold tests, and the intro and testing videos are free. Premium adds Equanimity Tables, Full Breath Cycles, five guided video lessons, and your full session history. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Choose how long your Calm & Sleep sessions last: up to 30 minutes of Coherence, up to 20 for the others, or the classic 4 rounds of 4-7-8. Tap the circle to start. The English voice now says “Inhale” and “Exhale”.

Version 2.10.1

The developer, KARLIE ALEXIS KOWALSKA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
KARLIE ALEXIS KOWALSKA
Size
90.9 MB
Category
Sports
Compatibility
Requires iOS 15.6 or later.
  • iPhone
    Requires iOS 15.6 or later.
  • iPod touch
    Requires iOS 15.6 or later.
  • Mac
    Requires macOS 12.5 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 31 more
  • English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Turkish, Ukrainian, Vietnamese
Age Rating
13+
  • 13+
  • Learn More
  • Infrequent
    Medical Treatment information
In-App Purchases
Yes
Copyright
© BreathHold 2025
  • Developer Website
  • Privacy Policy

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