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Screenshots

  • Kokyu: Diver Companion screenshot 1
  • Kokyu: Diver Companion screenshot 2
  • Kokyu: Diver Companion screenshot 3
  • Kokyu: Diver Companion screenshot 4

About Kokyu: Diver Companion

Kokyu is an apnea and breath-hold training app for freediving, spearfishing, surf survival, and CO₂/O₂ table practice. Build lung capacity, improve breath-hold control, and progress with guided CO₂ and O₂ sessions tailored to your level. Train with guided CO₂ and O₂ tables, track your progress, and develop the calm and control needed for longer, more efficient breath-holds. Key Features: • Guided CO₂ and O₂ table sessions • Customizable breath-hold routines • Audio and haptic cues for hands-free training • Progress tracking and streaks • Designed for freedivers, surfers, athletes, and beginners Support: • Privacy Policy: https://docs.kubicle.studio/kokyu-privacy • Terms and Conditions: https://docs.kubicle.studio/kokyu-terms • EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Acknowledgment: • Circle Water Splash by Vecteezy.com

Ratings & reviews

5.0

5 ratings

5 ★ 100% 4 ★ 0% 3 ★ 0% 2 ★ 0% 1 ★ 0%

What’s new

Version 1.4.1 · Updated February 3, 2026

We’ve held our breath for this update - built to help you train smarter and push your limits.

App privacy

The developer, Kubicle LLC, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Contact Info: Email Address, Name
  • Identifiers: User ID

Used for: App Functionality

Alternatives to Kokyu: Diver Companion

Looking for apps like Kokyu: Diver Companion? Here are 6 similar apps on the App Store. The highest rated is ApneaLab: Breath & Mind (5.0/5), and 5 of the 6 are free to download.

Kokyu: Diver Companion vs. alternatives
App Rating Price Last updated Compare
Kokyu: Diver Companion 5.0 / 5 (5 ratings) Free February 3, 2026
ApneaLab: Breath & Mind 5.0 / 5 (1) Free Sep 24, 2026 Compare
Apnea & Freediving Breath Hold – Free Jul 29, 2026 Compare
Apnea Trainer: Nea 4.9 / 5 (13) Free Oct 20, 2025 Compare
Stamina Apnea Trainer: ApneaX 4.0 / 5 (2) Free Nov 4, 2025 Compare
BreatheDeep: Apnea Trainer 5.0 / 5 (2) Free Oct 8, 2025 Compare
Freediver logbook – 1.99 USD Sep 17, 2026 Compare

Compare Kokyu: Diver Companion with the top alternatives: ratings, updates, ASO score and keyword gaps →