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.
Deepline 2.0 has a new look: thin lines, one typeface, big numbers and less on every screen.
- Progress is a thin ring, and a square for box breathing
- Mark a contraction by tapping anywhere on the screen
- The logbook records distance for DYN and DNF
- A short explanation before the breath-hold test
- Deleting and ending a session ask first
- The voice no longer catches up on skipped phases
- A new icon, and a quiet note when an update is out
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 Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Vitaly Vivchar
- Size
- 28 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 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.