# DeepBreath: Apnea & CO2 Tables — Freediving & Scuba Breathwork > Breathwork training app for divers and improved breath control. (iPhone/iPad app by James Montgomery Design Inc..) - Source: https://appshunter.io/ios/app/deepbreath-apnea-and-co2-tables/id6759741699 (this page in markdown: same URL + `.md`) - Developer: [James Montgomery Design Inc.](https://appshunter.io/developer/6781755221) - Category: Health & Fitness, Sports - Price: $3.99 - Rating: 5.00/5 from 2 App Store ratings · 4 written reviews indexed - Age rating: 17+ - Requires: iOS 26.2 · 51 MB - Languages: American English - Released: 2026-03-19 - Data updated: 2026-08-07 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/deepbreath-apnea-and-co2-tables/id6759741699/reviews.md ## What is DeepBreath? Daily breath training for freedivers, scuba divers, and anyone looking to improve breath control. Five core exercises cover everything from beginner box breathing to competition-style apnea tables. CORE EXERCISES • Box Breath — Equal-ratio breathing for calm focus • Breath-Up — Pre-dive preparation sequence • Air Save — Continuous cadence for efficient air use • CO₂ Tolerance Table — Decreasing rest intervals to build CO₂ tolerance • O₂ Tolerance Table — Increasing hold times to extend breath capacity ADVANCED TRAINING For experienced divers: structured programs including Frenzel and mouthfill equalization drills, pre-dive routines, static apnea intervals, and mammalian dive reflex conditioning — all designed for safe, dry-land practice. BUILT FOR CONSISTENCY • Session history with personal bests • Daily training streaks with unlockable sea creatures • Fully adjustable timings for every exercise • Quiz mode to train focus under breath-hold pressure • Ambient soundscape with meditation gong cues • Haptic feedback guides you through each phase All training is intended for dry land only. Never practice breath-holds in water without supervision. ## Key features - Core breathwork exercises - Advanced apnea training - Session history and personal bests - Daily training streaks - Adjustable timings - Ambient soundscapes - Haptic feedback ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/deepbreath-apnea-and-co2-tables/id6759741699/reviews.md ### 5/5 — Cut my air consumption on every dive *2026-05-06* The Air Save mode is a 1:2 inhale-to-exhale trainer and it genuinely improved my SAC rate. Practiced 10 minutes a day for two weeks before a liveaboard and my air lasted noticably longer on every dive. The breathing circle and phase beep keep you on cadence perfectly. Runs continuously with no round limit. Simple concept,gets results. ### 5/5 — Not a diver but I love this *2026-04-18* I don't dive at all but my freediver friend wouldn't shut up about this app so I tried it. The Box Breathing mode is amazing for anxiety. I use it before meetings and before bed. The circle animation is calming, the haptic taps keep me in rythm, and there's a little sea creature that swims around while you train which is a fun thing to unlock and keep me consistent. Simple, beautiful, works. ### 5/5 — Invaluable *2026-04-10* I’ve just gotten into freediving and found the whole breathing part really intimidating (because I was rubbish at it!). I’ve since improved so much and I have this app to thank for it. Daily practice is a must and DeepBreath makes that easy and fun that I actually want to practice! Thank you!! ### 5/5 — Helpful to get back into diving after some time off *2026-03-26* I’ve found this app really helpful to prepare for getting back into diving after years away from proactively diving for recreation and work ## Frequently asked questions about DeepBreath ### What is DeepBreath used for? DeepBreath provides daily breath training protocols designed for freedivers, scuba divers, and anyone aiming to enhance their breath control and focus. It includes exercises for calm focus, pre-dive preparation, air saving, and CO2/O2 tolerance. ### What are the core exercises in DeepBreath? The core exercises include Box Breath for equal-ratio breathing, Breath-Up for pre-dive preparation, Air Save for efficient air use, CO₂ Tolerance Table to build tolerance, and O₂ Tolerance Table to extend breath capacity. ### Can DeepBreath be used for water practice? No, all training within DeepBreath is intended for dry land only. The app strongly advises against practicing breath-holds in water without supervision. ### What advanced training options does DeepBreath offer? For experienced divers, DeepBreath includes structured programs for Frenzel and mouthfill equalization drills, pre-dive routines, static apnea intervals, and mammalian dive reflex conditioning, all for safe, dry-land practice. ### How does DeepBreath encourage consistency? DeepBreath promotes consistency through session history tracking with personal bests, daily training streaks that unlock sea creatures, and fully adjustable timings for all exercises. It also features a quiz mode to train focus under breath-hold pressure. ### What devices does DeepBreath support? DeepBreath is available for iPhone and iPad devices. It was last updated on May 7, 2026, with version 2.1.1. ### What is the age rating for DeepBreath? DeepBreath has an age rating of 17+. This is likely due to the advanced nature of some training protocols and the focus on potentially high-risk activities like freediving. ### How much does DeepBreath cost? DeepBreath is a paid application, priced at $3.99. It does not feature in-app purchases or advertisements. ## Version history (last 5 releases) ### 2.2 — 2026-06-30 This update brings small fixes and refinements: - Improved stability during breathing and training sessions - Minor visual and wording polish ### 2.1.1 — 2026-05-07 Additional onboarding page, and bug fixes. ### 2.0.1 — 2026-04-06 Bug fixes and performance improvements. ### 2.0 — 2026-04-04 - Improved onboarding experience. - Bug fixes. ### 1.0 — 2026-03-19 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*