Needs an update badly
Sure would be nice if they updated this and the Saturn moons apps. In particular, they need to allow greater zoom range to fit all the moons on the screen when they are far from the planet, and the Great Red Spot on Jupiter has drifted enough that the app no longer is helpful for finding out when it will be visible.
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GRS transit timings way off
The longitude of the Great Red Spot drifts continually and the app should be updated more frequently so that GRS transit timings are more accurate. Currently they are about 50 minutes too early.
Great for an astrophotographer
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.
No shadows displayed for Callisto, Europa and Ganymede’s transits
Good app, but only Io’s shadow si displayed on the simulated view.
Perfect for anyone interested in Jupiter!
This app was incredibly useful to see the moons of Jupiter during the opposition - where Jupiter is brightest - in August 2021!
Good pocket companion
This app is a clean, simple observing guide that enables you to determine what you’re looking at when you observe Jupiter, and also when transits of Galilean moons and the GRS will occur.
Would like my money back thanks
Refund please
Wide Angle needs to be wider
The only knock on this app is that the wide-angle view does not allow sufficient room for Callisto much of the time.
Decent - needs date/time control
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.
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NOT for iPhone X!
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.
Bad data
This app often has bad data concerning multi moon transits and moon shadow transits.
Date Option
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.
Very Useful
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.
Almost perfect!
The only thing this app is missing is the info telling you when Jupiter rises & sets for your location.
Great app and very useful
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!!!
Totally rate it! Totally cool!!!
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Great little app.
I only wish it had one more zoom level. Sometimes the transiting shadow is too small to see on my iPhone screen.
Perhaps it's me
Tap on what's happening on jupiter and date goes to 2000. Don't understand this app.
Simple and fast
This help plan my Astrophotography very nicely, no funny business
Very thin application
This app is disappointing in how little it does. Besides the main display of Jupiter and its four visible moons' positions, it has very brief descriptions and a few photos of the planet and the four moons. It is far from a complete reference on Jupiter. For example, it mentions the fact that Jupiter has more than 60 moons, but contains no other information about them.
Compared to other full featured astronomy apps like Star Walk, Safari Pro, or Luminos, each of which costs only a few dollars more, this app delivers very little for the money.
Compared to other full featured astronomy apps like Star Walk, Safari Pro, or Luminos, each of which costs only a few dollars more, this app delivers very little for the money.
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Nice app but a little pricy...
Just bought and tried the app, pretty nice, acurate and usefull in preparing for observation of Jupiter events... But I would say it is a little to pricy compared to other apps which are as usefull and as well designed.
