JupiterMoons

This app was incredibly useful to see the moons of Jupiter during the opposition - where Jupiter is brightest - in August 2021!

I liked the old java tool on the Internet by S&T but that didn't combine the movement of the moons with the Great Red Spot. This app combines all that plus gives a very good model of what you can expect to see at any given point in time. Very very useful for GRS location at times when the seeing is poor. Night mode is easy to switch on and off. Totally rate it! Totally cool!!!

Tap on what's happening on jupiter and date goes to 2000. Don't understand this app.

When the sky is clear I shoot photos of Jupiter, but have no idea which moon is where. This app helps me figure it out. It also helps me plan ahead to see if I can capture the great red Spot that night. Highly recommended for anyone who does planetary photography.

The only knock on this app is that the wide-angle view does not allow sufficient room for Callisto much of the time.

This WOULD be a good app if it let you set your own time, rather than going off UT. Because that’s a 7 hour difference, when it gives me “today’s” events, it’s useless to me because technically anything I’m going to look at tonight is “tomorrow” according to the app. But you can’t switch to any date other than today on the “Events” page (if I’m wrong, please someone show me how!). You can move back and forth in time on the chart page, but not the event page, which is the page that would actually be useful for organizing my viewing.

I love this app, but I can’t use it now that I have an iPhone X. Until they update this don’t try to use this with an iPhone X — you can’t get back out of it.

This app often has bad data concerning multi moon transits and moon shadow transits.

I've been using the on-line version for years and a bit disappointed we are nickel and dimed into paying for this. One glaring omission is an option to enter another time or date manually, instead of tapping, tapping at minute and hour intervals to get other dates and times.

Last night this app proved to be very effective. I was viewing a shadow transit across Jupiter when I spotted what I suspected was the GRS, so I then opened the Jupiter's Moons App and it immediately confirmed my sighting.