# freefall: Freediving & Apnea — CO2 & O2 Breath Hold Tables

> CO2 & O2 Breath Hold Tables (iPhone/iPad app by 宜昌市在渊文化有限公司.)

- Source: https://appshunter.io/ios/app/freefall-freediving-and-apnea/id6798930059 (this page in markdown: same URL + `.md`)
- Developer: [宜昌市在渊文化有限公司](https://appshunter.io/developer/6798930061)
- Category: Utilities
- Price: $5.99
- Age rating: 4+
- Requires: iOS 16.4 · 287 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-09-20
- Data updated: 2026-10-24

## What is freefall?

freefall is a dedicated freediving apnea trainer and customizable breath-hold table companion designed for freedivers, spearfishermen, and aquatic athletes. 

Build, customize, and execute personalized CO2 tolerance and O2 hypoxia tables with crystal-clear voice guidance, immersive aquatic caustics visual feedback, and zero online distractions.

Whether you are preparing for your next depth certification, working on static apnea (STA), or expanding your dry-land breath-hold capacity, freefall gives you total control over every breathing stage.

KEY FEATURES:

• Precision Apnea Tables:
  - CO2 Tolerance Tables: Condition your body to tolerate rising carbon dioxide levels and delay the urge to breathe.
  - O2 Hypoxia Tables: Adapt your mind and muscles to operate comfortably under diminishing oxygen reserves.
  - Custom Tables: Build fully tailored round-by-round routines with custom preparation, hold, and recovery intervals.

• Intelligent Dual-Voice Guidance:
  - Stay completely relaxed with your eyes closed during breathe-up and breath-hold phases.
  - Crystal-clear voice cues announce stage transitions, countdowns, and safety checkpoints.
  - Choose between Calm and High-Visibility audio engines to suit your training environment.

• Dynamic Visual Immersion:
  - Clean, dark-mode aquatic interface with smooth GPU-accelerated caustic wave simulations.
  - High-contrast visual cues that keep essential countdowns readable at a glance without breaking your focus.

• 100% Pure Offline & Privacy-Focused:
  - Operates completely offline without requiring internet access or network permissions.
  - No ads, no tracking SDKs, no accounts, and no data collection. Your training logs and sessions stay strictly on your local device.

• Universal Language Support:
  - Seamlessly switch between English and Simplified Chinese for both interface text and voice guidance independently.

TRAIN SAFELY:
Dry-land apnea training only. Never practice breath-holding in water without certified direct one-on-one buddy supervision. Never practice hyperventilation.

## Is freefall safe?

Not enough ratings yet to assess freefall.

## Is freefall legit?

freefall: Freediving & Apnea has limited verification signals. The AppsHunter Legitimacy Score for freefall is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1.4 — 2026-09-25

Welcome to freefall (formerly Breathe Timer)!
• Rebranded to freefall: A refreshed identity and iconic freediver emblem celebrating the quiet focus of deep descent.
• Elevated Home Screen: Redesigned header with streamlined brand badge, ambient depth glow, and refined controls.
• Offline Privacy First: Pure local training sessions with zero external tracking.
• Performance optimizations and smoother timer transitions.

### 1.1.2 — 2026-09-21

No release notes.

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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 2026-10-24.*