I have been using BÉPO on my phone since a few years. It is a keyboard layout optimised for French, based on the principle of Dvorak. https://wikiless.org/wiki/BÉPO I still use AZERTY on all my physical keyboards as the switch is much harder, especially with my company or customers ones… The switch from a layout on a phone to a different one on a physical keyboard is transparent.

The real one is the first result on Qwant.

I use Blabber.im but I never tried anything else.

It seems surprising to be greeted by a cookies banner on such a website. There isn’t even the option to reject them.