ZenDepth
Apnea & Breath Hold Training
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Your personalized breath hold journey starts here. Adaptive CO2 & O2 tables, unlockable techniques, and badge milestones — built for freedivers, spearfishers and beyond.
Master your breath. Extend your limits.
ZenDepth is a personalized apnea training app built for freedivers, spearfishers,
surfers, and meditators who want to go further underwater.
Set your baseline. Get a 12-session adaptive plan calibrated to your personal best. Track
your progress through phases as your hold times grow.
SMART TRAINING PLANS
CO2 tables build your tolerance to high carbon dioxide. O2 tables train your body to use
oxygen more efficiently. Every plan adapts to your current level and improves with you.
GUIDED STRETCHING
Expand your lung capacity and thoracic mobility with five science-backed stretching
exercises — guided in real time with live cues.
UNLOCK TECHNIQUES
Master 20 breath-hold techniques progressively as you train — from Recovery Breathing to
advanced Breath Packing.
GAMIFIED MILESTONES
Earn badges, conquer phases, and watch your guided streak grow. Training feels like
progress, not a grind.
TRAIN WITH FRIENDS
Add friends by username and see how your personal bests stack up. A private leaderboard
built for the freediving community.
BEAUTIFUL BY DESIGN
An underwater aesthetic that makes every session feel like a dive. Animated backgrounds,
glass-morphic UI, and haptic feedback designed for focus and flow.
ZenDepth is free to start. Unlock all training phases with a premium subscription after completing the first training phase.
Terms of Use: https://zendepth.app/terms.html
Ratings & Reviews
- Push notifications
- Bug fixes and performance enhancements
The developer, Christos Voutsaras, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Christos Voutsaras
- Size
- 8.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Infrequent
Contests
- In-App Purchases
Yes
- Annually $19.99
- Lifetime $49.99
- Monthly $3.99
- Copyright
- © 2026 Christos Voutsaras