# Holdfast: Freedive Trainer

> Apnea & breath-hold tables

Canonical page: [https://chrome-stats.com/d/id6779100560](https://chrome-stats.com/d/id6779100560)

## Overview

- **ID:** `id6779100560`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Jorge Bustamante
- **Category:** Health & Fitness
- **Version:** 1.1
- **Last updated:** 2026-06-17
- **First published:** 2026-06-15
- **Size:** 4.04 MB
- **Data as of:** 2026-09-11
- **Store listing:** [Apple App Store](https://apps.apple.com/in/app/holdfast-freedive-trainer/id6779100560)
- **Website:** [https://project-n2ylo.vercel.app/index.html](https://project-n2ylo.vercel.app/index.html)
- **Privacy policy:** [https://project-n2ylo.vercel.app/privacy.html](https://project-n2ylo.vercel.app/privacy.html)

## Description

Take a quick breath check and get CO₂ and O₂ tables built for you — free. Now with Apple Watch training, sharing, and a one-time Lifetime unlock.

Holdfast is a calm, focused breath-hold trainer for freedivers, spearos, and anyone learning to sit comfortably with the urge to breathe. Run proven CO₂ and O₂ tables on your iPhone — or entirely on your Apple Watch, screen-off and haptic-guided — so every session feels effortless.

WHY HOLDFAST
- CO₂ tables to blunt the urge to breathe; O₂ tables to extend your hold.
- Guided sessions with gentle haptic and audio cues — eyes closed, no screen needed.
- Built for Apple Watch: start, run, and finish a full session from your wrist, screen-off, driven by taps.
- Progress that motivates: history, streaks, personal bests, and clean charts.
- Heart rate during holds via Apple Health (optional).
- 100% offline. No account, no sign-up, ever.

FREE FOREVER
- The full CO₂ and O₂ table trainer, on iPhone and Apple Watch.
- Session history, streaks, and personal bests.

HOLDFAST PREMIUM
- Custom table builder — design your own ramps.
- Training plans — structured, progressive programs.
- Advanced analytics — deeper trends and recovery insight.

TRAIN SAFELY
Holdfast is for dry training only. Never practice breath-holding in or near water alone, and never hyperventilate. Shallow-water blackout gives no warning. Stop immediately if you feel dizzy, lightheaded, or tingling, and talk to a doctor before starting breath-hold training if you have heart, lung, blood-pressure, or pregnancy concerns.

PRIVATE BY DESIGN
Everything runs on your device. No account, no tracking; your health data stays in Apple Health.

—
Holdfast Premium is an auto-renewing subscription.
- Monthly $3.99 / Annual $29.99, with a 7-day free trial (USD; prices vary by region).
- Payment is charged to your Apple ID at confirmation of purchase.
- It renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged within 24 hours prior to renewal.
- Manage or cancel anytime in your App Store account settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: [your privacy URL]

## Rankings

- #2,257,989 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6779100560)