Kokyu: Diver Companion
Breathe. Dive. Discover.
About
This app helps you improve breath-hold capacity through guided CO₂ and O₂ training sessions. It offers customizable routines and progress tracking for freediving, spearfishing, and general fitness. Audio and haptic cues enable hands-free practice.
What's New in Kokyu
1.4.1
February 3, 2026
We’ve held our breath for this update - built to help you train smarter and push your limits.
Subscription plans
Kokyu Plus Annual
Unlock all Kokyu+ features with annual billing
In-App Purchases
$59.99
Kokyu Lifetime
Unlock all Kokyu+ features forever
Developer apps
FAQ
What is Kokyu used for?
Kokyu is an apnea and breath-hold training app designed to help users build lung capacity and improve breath-hold control. It offers guided CO₂ and O₂ sessions tailored for freediving, spearfishing, surf survival, and general fitness.
Does Kokyu have ads?
No, Kokyu does not contain advertisements. The app is free to download and use, with optional in-app purchases for enhanced features.
What are the subscription options for Kokyu?
Kokyu offers a 'Kokyu Plus' subscription with monthly ($1.99/P1M) and annual ($11.99/P1Y) plans. The annual plan includes a 3-day free trial.
How does Kokyu track progress?
Kokyu features progress tracking to monitor your breath-hold improvements over time. It also includes a streak feature to encourage consistent training.
Can Kokyu be used hands-free?
Yes, Kokyu is designed for hands-free training with audio and haptic cues. This allows users to focus on their breath-hold exercises without needing to constantly check their device.
What devices support Kokyu?
Kokyu is available for iPhone and iPod devices. The app is rated for ages 4 and up.
How often is Kokyu updated?
The latest version of Kokyu is 1.4.1, which was last updated on February 3, 2026. Updates typically include new features, bug fixes, and performance improvements.
What is the user sentiment for Kokyu?
Kokyu has received overwhelmingly positive feedback, with an average rating of 5.0 stars from 5 ratings. This indicates a high level of user satisfaction with the app's functionality and effectiveness.
