First of all, superb work on this. I've been using it since before there was even a UI to speak of and it's a wonderful app. I had wanted a decent activity log on Switch since before I even got one and even asked about developing a homebrew one on reddit, etc, so thanks a lot for doing it!
Secondly, is there any way that this could show how playtime is divided between handheld and TV mode for each game or even in general? I'd be really interested in that and I know I'm not alone in that. The info should be stored somewhere since Nintendo themselves knows it and includes some of it in those emails they sometimes send out.