# Dive Hard Freediving Trainer — Improve breath hold capacity

> Freediving training app for breath-hold improvement using CO2/O2 tables and box breathing. (iPhone/iPad app by Kevin Carlson.)

- Source: https://appshunter.io/ios/app/dive-hard-freediving-trainer/id1615137732 (this page in markdown: same URL + `.md`)
- Developer: [Kevin Carlson](https://appshunter.io/developer/1615137734)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Rating: 4.90/5 from 9 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 47 MB
- Languages: American English
- Released: 2022-03-27
- Data updated: 2026-06-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/dive-hard-freediving-trainer/id1615137732/reviews.md

## What is Dive Hard Freediving Trainer?

Maximize Your Breath Hold with Our Free-Diving Training App!

Whether you’re a freediver, water polo player, competitive swimmer, Navy SEAL candidate, military diver, or special operations professional, mastering your breath-hold is key to enhancing your underwater endurance and overall performance. This app is designed to help you train efficiently and push your limits using proven CO2 and O2 tables, as well as box breathing techniques used by elite divers.

Perfect for:
Freedivers looking to push their limits and dive deeper.
Water Polo Players & Swimmers aiming to boost underwater stamina and breath control.
Navy SEAL & Military Diver Candidates sharpening their breath hold for aquatic operations.
Special Operations Personnel training for breath-intensive tasks.

Key Features:
CO2 & O2 Tables: Tailor your training with customizable CO2 and O2 tables, designed to gradually condition your lungs, improve breath-hold time, and build mental resilience.
Box Breathing: Practice controlled breathing to calm your nervous system, boost oxygen efficiency, and improve mental focus.
Audio Cues: Keep your attention on your performance with seamless audio and push notifications guiding you through each interval—perfect for use while multitasking or listening to music.
Background Functionality: Continue your training while using other apps or playing music, ensuring your practice fits seamlessly into your routine.
Customizable Intervals: Adapt the app to suit your unique training needs, whether you're just starting or preparing for advanced aquatic challenges.

Why Choose This App?
Whether you're preparing for underwater competitions or high-stakes missions, this app gives you the tools to improve your breath-hold, calm your mind, and increase your underwater endurance. With user-friendly features and elite-level techniques, it’s the perfect training companion for anyone aiming to excel in aquatic environments.

Download today and start mastering your breath like the pros!

*** Active duty military, service academy and ROTC cadets and midshipmen, complete support form to receive promo code to remove ads for free!! ***

## Key features

- CO2 & O2 Tables
- Box Breathing
- Audio Cues
- Background Functionality
- Customizable Intervals

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Ad Free Monthly Subscription | $0.99 | per month |
| Ad Free Yearly Subscription | $8.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/dive-hard-freediving-trainer/id1615137732/reviews.md

### 1/5 — Very little customization

*2024-06-29*

This is possibly the worst breathhold app out there, with essentially no ability to build your own or customize the basic tables. Many other features missing from a serious freedive training standpoint

### 4/5 — Remove ads not working

*2022-11-27*

I love the app but sadly removing ads is not quite working. I paid for the feature but the ads keep reappearing randomly, so I have to constantly use “restore premium” menu to turn them off again. Could you possibly fix it?
UPD: the developer did not respond, but rebooting the device and restarting the app a few times has somehow cleared the issue.

## Frequently asked questions about Dive Hard Freediving Trainer

### What is Dive Hard Freediving Trainer?

Dive Hard Freediving Trainer is a health and fitness app designed to help users improve their breath-hold capacity. It uses techniques like CO2 and O2 tables, and box breathing to enhance underwater endurance and performance.

### Who is Dive Hard Freediving Trainer for?

This app is suitable for freedivers, water polo players, competitive swimmers, and candidates for military diving roles. Anyone looking to increase their underwater stamina and breath control can benefit.

### What training methods does Dive Hard Freediving Trainer use?

Dive Hard Freediving Trainer employs proven CO2 and O2 tables to condition lungs and improve breath-hold time. It also includes box breathing exercises for calming the nervous system and boosting oxygen efficiency.

### Does Dive Hard Freediving Trainer have ads?

Yes, Dive Hard Freediving Trainer contains advertisements. However, active duty military, service academy, and ROTC cadets and midshipmen can receive a promo code to remove ads for free by completing a support form.

### What are the subscription options for Dive Hard Freediving Trainer?

Dive Hard Freediving Trainer offers an 'Ad Free Monthly Subscription' for $0.99/month and an 'Ad Free Yearly Subscription' for $8.99/year to remove advertisements.

### How accurate is the data in Dive Hard Freediving Trainer?

While the app provides structured training tables and cues, user data accuracy for breath-hold times depends on individual performance and adherence to the program. The app focuses on guiding users through established training protocols.

### What devices support Dive Hard Freediving Trainer?

Dive Hard Freediving Trainer is currently supported on iPhone and iPod devices. It is rated for ages 4 and up.

### How often is Dive Hard Freediving Trainer updated?

The latest version of Dive Hard Freediving Trainer is 3.0, and it was last updated on November 15, 2025. This indicates a relatively recent update, suggesting ongoing development and support.

## Version history (last 5 releases)

### 3.0 — 2025-11-15

** Active duty military complete support form to receive promo code to remove ads for free! **

-Added offer code redeem button to paywall
-Added an optional 10 second warning that can be toggled in the settings.
-General improvements and bug fixes

### 2.1 — 2024-12-07

Bug fixes and improvements.
Offer in-app subscription to remove ads.

### 2.0 — 2024-10-20

**Key Updates to Enhance Experience**
- Improved timer accuracy
- Audio and push notifications to indicate next interval
- Background audio to allow training while using other apps
- Miscellaneous bug fixes and improvements

### 1.2 — 2022-04-19

Purchase premium version to remove ads. Bug fixes and improvements.

### 1.1 — 2022-04-05

Bug fixes.

## Apps similar to Dive Hard Freediving Trainer

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| [Freediving Apnea Exercise](https://appshunter.io/ios/app/freediving-apnea-exercise/id6479372267) | 4.0 (1) | Free | Health & Fitness |
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*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 2026-06-04.*