We're not quite "fully launched" at this time, but you might want to check out Trestle: https://www.trestleapp.com/ https://www.trestleapp.com/ We don't meet

We're not quite "fully launched" at this time, but you might want to check out Trestle: https://www.trestleapp.com/ https://www.trestleapp.com/ We don't meet all your bullet points from above, but your closing paragraph sums up what we're doing with Trestle pretty well (i.e. more than just a web connected database).