I'm on the lookout for a product to plan only the current day. This is a nice first version, but I think for it to be really beneficial the UX needs to be on point - adding tasks as quick as possible (like Google Calendars quick add - "Clean Kitchen 1200-1215") and quick glance using a widget or permanent notification of next/current/prev task. Also, Reordering doesn't work for me.
Again, as I said I think this is a well executed first version, but the problem is I don't think I'll be able to keep using it without the mentioned features. I'll keep it on my phone in case it gets updated since it's small and requires almost no permissions.