Current Version

A view of the application


Everything is visible at a glance

Time in immersion, max depth, cycle number and much more ...

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Immersion view


Nothing to do, no button to operate

Switching to immersion mode is automatic. A new screen displays useful information.

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Alert view


Depth alert

An alarm warns you when target depth is exceeded

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Data view


Information about your last descent

Get additional information about last dive, including each dive leg time

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Data view

Very useful

Session record

A second data screen displays your max time in immersion and of course your maximum depth.

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All information on just 2 screens

A surface screen that switches to a specific display during immersion.

Surface view
Immersion view
  • Surface time
  • Immersion time
  • Heartrate
  • Current depth
  • Current vertical speed
  • Immersions count
  • Recording status

Stay informed during your dive

Vibration alerts diver if too fast or too slow.

Set interval in seconds for timed alert during dive or recovery.

Cadence view

Alert view


Depth alert

An alarm warns you when target depth is exceeded

Settings view

All settings at a fingertip.

Fine-tune your workout

  • Depth alert
  • Current depth notify
  • Activity recording
  • Dive detection depth setup: 0.3m, 1m or 1.5m.
  • Interval alert setup for immersion: Off, 10", 20", 30", 50", 1', 2'
  • Interval alert setup for recovery: Off, 10", 20", 30", 50", 1', 2'
  • Toggle alert backlight
  • Backlight on during all immersion
  • Simulation


Apnea CWT is compatible with the following Garmin watches:

  • D2 Bravo
  • D2 Charlie
  • Descent MK1
  • Forerunner 935
  • Fenix 3 (15m limitation)
  • Fenix 3 HR
  • Fenix Chronos
  • Fenix 5, Fenix 5 Plus
  • Fenix 5S, Fenix 5S Plus
  • Fenix 5X, Fenix 5X Plus
  • Vivoactive 3
  • Soon, other models supported
Some devices

I want to use it !

Apnea App development requires significant investment and time in programming, testing, research and even hardware (pressure chamber).

Therefore Apnea App now comes with a charge. Payment entitles you to:

Payment grants you an individual license, per device.

Price is 12€.

If Paypal is not available in your country, please contact me at contact @