How to use the app?Each time you start the app, please take a few seconds to turn your phone in all directions: this will greatly improve accuracy!
Then simply wait for your phone to find your position on earth (upper icon), since the trajectories depend upon that.
Please avoid magnetic fields that may corrupt the compass of your phone: for example, avoid any phone covers with magnets!
Drag or tap to change the date and
thus pre-visualize the sun or moon
trajectory in the weeks or months to
come.
Drag or tap to change the time and
make the sun run along its path on
the selected day.
Sunrise and sunset times for the
selected day are also displayed.
You can also set a particular date
using the calendar.
Use the "now" button to get back
quickly to the present date and time
settings.
Choose between displaying the sun,
its shadow, or the moon.
The drawing of the shadow can help
you predict where your own shadow
will be.
If you are at the top of a building or a
mountain, you will then be able to
predict its shadow!
Activate the water mode.
You can now tell where the sun or the
moon will be...
...if reflected in water!
The blue arrows represent the
summer and winter solstices. The sun
path will always be -all year long-
between those two.
This way, you can immediately see
that the sun on this picture will never
be lower than the blue arrows.
This is also relevant for the drawing
of the shadow.
Hit the "photo" button to freeze the picture.
You can then change the date and consult the sun path and
the moon path without having to keep the phone steady.
Click a second time on the "photo" button to go back to the
live video mode.
The moon is included!Use the moon phases calendar:
Learn at a glance on which days the
moon will be full (or conversely when
the night will be moonless).
The upper-left drawing shows
precisely which phase of the moon
you will see on the chosen date.