Garmin CIQ DataFields limitations

zlelik said:

Do I correctly understand that if I use Toybox.WatchUi.DataField or Toybox.WatchUi.SimpleDataField or any other way to implement DataField for standard Garmin apps like Running, then I can only display info on the screen and I cannot save anything to FIT file.

Incorrect. It is a very common use case for CIQ data fields to write developer data (fields) to the activity FIT file.

zlelik said:

Although Toybox.WatchUi.DataField has a createField method, but it is to be used from Application, not from DataField itself. Is it correct?

No, DataField.createField is for data fields. For a (device) app, you would use ActivityRecording.Session.createField.

For an example of a data field that writes custom data, see the MoxyField SDK sample. In VS Code, open the command palette (CTRL-SHIFT-P / CMD-SHIFT-P) and select "Monkey C: Open Samples Folder".

Thank you. I will check the examples.
What about data? Is it true that I can only access this data from DataField?
https://developer.garmin.com/connect-iq/api-docs/Toybox/Activity/Info.html

No worries!

What about data? Is it true that I can only access this data from DataField?
https://developer.garmin.com/connect-iq/api-docs/Toybox/Activity/Info.html

Like the doc says, you can also access Activity.Info by calling Activity.getInfo().

use fitContributor for the permissions, not ActivityRecording