I've seen some apps that keep track of sunrise/sunset and twilight times (nautical, civil, etc) for chosen locations, but looking for something more like the maps that Leighton Paul's software HourWorld™ had.. with global map options including a graphic representation of light and dark areas of the world as time passes in a given day. His software was maintained for over 20 years but has now been discontinued. Anyone have suggestions for some replacement options? I'm running Catalina at the moment on my 2020 MBA but will eventually update to Big Sur (well that could be a big maybe lol). Whatever it is must run w/ Catalina, I'll worry about OS upgrades later. Or, if you know of something that's iOS only, for iPad.. and current.
