The Apnea blog

New version: Apnea CWT 2.0.3

Aug. 19, 2023 from Charles
cwt apnea freedive

Apnea CWT 2.0.3 is released today, correcting a few minor bugs and bringing support for new devices.


List of fixes

  • Correction of a crash occurring with OLED / AMOLED devices
  • Reloading of a popup in the about page when pressing the up button.
  • Default activity type now changed to generic (see below)
  • Fixed Buddy page display on devices with 240x240 resolution

New devices supported

  • D2 Air
  • Epix 2
  • Venu 2
  • Forerunner 955
  • Forerunner 965 …
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New versions: Apnea CWT 2.0.2 and Apnea DYN 2.0.0

March 10, 2022 from Charles
cwt dyn apnea freedive

2 new versions are released today, here is the list of changes below.

Apnea CWT

This is essentially a fix for a problem with Venu models that was causing a crash after a few seconds or minutes of use. If you don't have a Venu, there is no need to update Apnea CWT to version 2.0.2.

New supported devices

The list of supported watches is growing:

  • Descent MK2S
  • Forerunner 945 LTE
  • Fenix 7 series

Apnea …

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New version : Apnea CWT 2.0

May 7, 2021 from Charles
cwt apnea freedive binôme buddy

More than a year and a half has passed since the last update of Apnea CWT but the wait was worth it: a lot of new features are available in this version.

The development took a long time mainly because of the lack of time to properly test the features due to the health restrictions that affect us all.

New features

Here is the list of changes.

Change of the interface

When opening the application, …

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Support for new Garmin models

July 31, 2020 from Charles
garmin venu fr645 forerunner forerunner645 d2delta

The development of a brand new version of Apnea continues but is not yet finished and you should not be disappointed with the changes and new features. (spoiler: a "buddy" mode, I'll let you guess what it will be used for)

In the meantime, the list of compatible models is growing with the support of the following watches:

  • Garmin D2 Delta
  • Garmin Forerunner 645
  • Garmin Vivoactive 4
  • Garmin Venu

Note however that these models are …

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Activities management

Oct. 10, 2019 from Charles
apnea activity freedive freediving sharing share

After a long period of testing, a long-awaited feature has been implemented: the management of activities directly from the Apnea site.

By log-in in to Apnea, you have access to a view of your activities that you can filter by different criteria and sort in order to easily find information about an outing or training.

View of activities table

By clicking on one of the thumbnails in the table, you open the activity in floating mode ("popup") over the …

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New versions : Apnea DYN 1.11.0 and Apnea CWT 1.8.0

Sept. 13, 2019 from Charles
cwt dyn version fenix6 fr945 marq

2 new minor versions are published today.

They fix some bugs and add support for new models, here are the details (valid for the 2 versions Apnea CWT and Apnea DYN):


  • The immersion rate did not work properly according to certain settings


  • The name of the activity is changed to "Freedive DYN" and "Freedive CWT".
  • Adding information to the activity (which will be used to display activities on the Apnea website)
  • Support of …
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Site update

Aug. 31, 2019 from Charles

The new Apnea site is officially open!

At first glance, you may not see the difference, but it has nothing to do with the old one.

You may have noticed a link on the top right to connect to the site: from now on, you can connect to your space to manage your Apnea CWT registration keys yourself (simply by using the password recovery form) but most importantly, it will be possible to access its …

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Apnea actuality

July 16, 2019 from Charles
apnea site activity freedive

It's been a long time since I've given any news via the blog, mainly for the reason mentioned in the previous article.

Le support

I no longer do support via Facebook / Messenger, the only way to get help is via the following email address:, I always make sure to respond quickly to requests.

Apnea DYN and Apnea CWT applications

Many interesting new features are to be expected concerning Apnea CWT and …

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New versions : Apnea DYN 1.10.5 and Apnea CWT 1.7.5

Oct. 12, 2018 from Charles
cwt dyn version

2 new versions of Apnea are released today, it only fixes minor bugs.

On Apnea DYN, the reading of the Depth parameter was not correctly read and the immersion then started all the time at 0.5m.

In common, on Apnea DYN and Apnea CWT, the following bugs have been fixed:

  • Fixed an error when reading the Event parameter making it inoperative
  • Fix on french locale

The family having recently grown, I took a while to …

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New versions : Apnea DYN 1.10.4 and Apnea CWT 1.7.4

July 26, 2018 from Charles
cwt dyn version Vivoactive3

Garmin has recently released a new version of the firmware for Vivoactive 3: the 5.20, in the ChangeLog, we can see:

Change Log 5.20

Fixed golf activities not recording distance
Added support for abnormal heart rate alerts
Fixed UI changing pages while swimming

The last element hides the deactivation of the touch screen for swimming-type activities making all third-party applications completely unusable, of course, the Apnea versions are affected by this problem.

Note in passing …

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New versions : Apnea DYN 1.10.3 and Apnea CWT 1.7.3

July 18, 2018 from Charles
cwt dyn version fenix5plus fenix5xplus fenix5splus

Publication of 2 new minor versions that support the following models:

  • Fenix 5 Plus
  • Fenix 5S Plus
  • Fenix 5X Plus

If your watch is not one of these models, you do not need to update.

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Apnea CWT documentation is published

June 13, 2018 from Charles
apnea documentation pdf manual


The english version of Apnea documentation is published in PDF format.

Thank to Ralph Maurin from Montreal for the traduction.

This is the index :

  • Presentation
  • Current compatibility
  • Installation
  • Quick discovering of the application
  • Main screen and information screens
  • The main screen
    • Surface
    • Last immersion
  • Immersion
  • Settings
  • Example with "Activity" setting
    • Announcements...
    • Announcements > Alarm...
    • Announcements > Alarm... > Profondeur
    • Announcements > Alarm... > Quantité
    • Announcements > Notification
    • Announcements > Cadence... > Surface
    • Announcements …
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New versions : Apnea DYN 1.10.2 and Apnea CWT 1.7.2

April 20, 2018 from Charles
cwt dyn version infos garmin activity

Today is released two new versions of Apnea that fixes 2 problems.

The first patch is minor and only applies to Apnea CWT

  • In simulation mode, the "SIM" status in the immersion view was no longer displayed.

The second correction requires a little more explanation and concerns Apnea DYN and Apnea CWT

When you launch Apnea, an activity is created and will store all the information related to the activity. An activity is linked to …

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Blog creation

April 5, 2018 from Charles

The use of Facebook as a means of communication has show these limits rather quickly, the articles were not relayed to everyone and the layout is much too limited.

So, I decided to create this blog and I will try now to publish articles with each new version of Apnea detailing a little more the changes and novelties.

It is also likely that I publish articles on freedive but not directly related to Apnea.

To …

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