Deepline: Apnea & Freedive
Breath-hold trainer & log
Free · Designed for iPad. Not verified for macOS.
Your full freediving logbook with a GPS pin for every dive — now beside the calm apnea trainer. CO2/O2 tables, box breathing, your progress. Fully offline, always yours.
Find your breath. Deepline pairs a calm apnea trainer — CO2 and O2 tables plus box breathing — with a beautiful freediving logbook. Fully offline. The numbers are the heroes, and the water goes still when you hold.
Deepline is for freedivers, spearfishers and snorkelers — and for anyone who wants a quieter way to train their breath.
Train your breath hold
- CO2 and O2 apnea tables, auto-built from your personal max
- Box breathing for daily calm and pre-dive focus
- A still, high-contrast timer made for wet hands and bright sun
- The water stays motionless during every hold — nothing to distract you
Log every dive
- Depth, breath-hold time, discipline and conditions
- A GPS pin for every spot
- Your full freediving logbook, kept on your device
See your progress
- Watch your breath-hold time grow, session after session
- Personal records, kept simple
Calm by design
- A signature living-water interface, not another stopwatch
- No clutter, no noise, no emoji
- Works fully offline — no account, no sign-up, your data stays yours
How it works
1. Measure your baseline breath hold
2. Train with CO2 / O2 tables and box breathing
3. Log your dives and watch your progress deepen
Free to use. Your breath, your data, your line to the deep.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
First release. The calm apnea trainer and freediving logbook are here: CO2/O2 tables, box breathing, a dive log with a GPS pin, and your progress over time. Fully offline, no account.
The developer, Vitaly Vivchar, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Vitaly Vivchar
- Size
- 36.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Vivchar V. V.