Output if `--release` or normal build inside app?

[Audrey84]

Is there a way to figure out if the app running in a --release or normal dev build inside the app and output this in for example a settings page?

[Sujan12]

Yes, there is:
https://ionicframework.com/docs/native/is-debug/

This looks for values set when building in “debug” mode (which is the opposite of --release).