No. it doesn’t have an integration feature but you could provide a preffered cummunication method but it limited for now.

About the tiner, I think it’s not feasible. I don’t know.

Well, I think it’s on the description.

It’s FOSS, offline, no account required, and others in the future. I honestly don’t know much about Monica since I don’t use it. I don’t use web services that has a free and offline alternatives.

It’s on early development so there’s not really a huge difference.