Sol Et Umbra

Sol Et Umbra Free App

Rated 4.73/5 (182) —  Free Android application by Gian Casalegno

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About Sol Et Umbra

Sol Et Umbra is a program that shows sun ephemeris and is devoted to sundial designers.

The program shows the main sun parameters for the actual (or whichever desired) time and date:
- latitude and longitude
- right ascension and declination
- local azimuth and height
- equation of time
- local or time zone sun time
- local or time zone mean time
- time of (geometric center) rise, (geometric center) set and transit (local noon)
- total number of hours of light

When a network connection is available, by means of the Network Time Protocol the time error between the phone clock and an atomic clock is found and used to correct the displayed time.

The position of the device is found through GPS or, when this is not available, through information from the network or finally through manual setting.

Moreover Sol Et Umbra shows the time using the following time systems:
- italic time
- babilonic time
- temporal time

It also shows the time of Muslims prayers (that are strictly related to the position of the sun):
- Fajr
- Zuhr
- Asr1
- Asr2
- Maghrib
- Isha
and the Qibla (direction of the Ka'ba).

Sol Et Umbra uses the orientation sensors available in the device in order to compute and show the time lines (french, italic, "da campanile", babilonic or temporal) of a sundial designed on the plane of the display.
The graph is updated after any movement of the device.

Finally the program can show the lighting conditions of the dial as drawn on the device plane by means of an azimut/height graph that shows for any day in the year and for any hour in the day whenthe dial is lighted. Moreover the sun path in the sky is displayed over the camera acquisition.

Note
The accuracy in the measurement of the orientation of the device depends on the accuracy of internal sensors. Moreover in the presence of external magnetic fields the declination and inclination as shown by the app can have a large error. If you plan to design a sundial do not rely on these numbers, please use the measurement methods described in the author's site.

Sol Et Umbra needs the following permissions:
- network connection for clok sync (if not available, a smaller time accuracy will be obtained)
- GPS localization (if not available, the current position must be manually introduced)
- device camera

If the app crashes for whichever reason, Android can send a report to the author containing useful information to fix the problem.
PLEASE AUTHORIZE THE SHIPMENT OF THIS REPORT !
It does not contain any personal information.

More information on the program are available from the author's site:
http://digilander.libero.it/orologi.solari/download/SolEtUmbraENU.html
From this same site a complete free program for sundial design and simulation is available (Windows only).

Author can be contacted at the address:
gian.casalegno@gmail.com
(please send me an e-mail with your doubts and your ideas, I cannot answer to the comments posted on Google Play Store)

How to Download / Install

Download and install Sol Et Umbra version 11.10 on your Android device!
Downloaded 5,000+ times, content rating: Everyone
Android package: gian.gnomonica.SolEtUmbra, download Sol Et Umbra.apk

All Application Badges

Free
downl.
Android
2.3+
Bug
buster
For everyone
Android app

App History & Updates

What's Changed
rev. 11.10
- Privacy Policy added
rev. 11.9
- error fixed with negative altitudes
rev. 11.8
- small UI changes
rev. 11.6 11.7
- French translation improved
rev. 11.4
- French language added
rev. 11.3
- option added for azimuth reference direction South or North
rev 11.2
- fixed issues with some devices
- help command moved to top of menu
rev. 11.1
- sun height corrected for parallax
- azimuth and height lines added to sundial simulation and sun path drawing
Version update Sol Et Umbra was updated to version 11.10
Version update Sol Et Umbra was updated to version 11.8
Version update Sol Et Umbra was updated to version 11.0
More downloads  Sol Et Umbra reached 5 000 - 10 000 downloads

What are users saying about Sol Et Umbra

V70%
by V####:

The interface can be made more beautiful.

R70%
by R####:

it shows the rise, midday, sunset, middnight perfectly for the whole world

G70%
by G####:

Wonderful app that integrates and works very well with my nexus 7. Satisfies my needs and saves lugging a laptop and GPS around! Thank you!

Q70%
by Q####:

Very helpful

Q70%
by Q####:

Nice features

Q70%
by Q####:

Everything you need for making Sundials and lots more. Great app !

Q70%
by Q####:

Excellent! Just what I was looking for.Thanks Gian for this great app

U70%
by U####:

Congratulations and many thanks for a great utility.

Q70%
by Q####:

Wonderful app that integrates and works very well with my nexus 7. Satisfies my needs and saves lugging a laptop and GPS around! Thank you!

N70%
by N####:

Excelente

E70%
by E####:

Very Nice

Q70%
by Q####:

The interface can be made more beautiful.

X70%
by X####:

Good job Gian...this pro dialist gives it 5 stars!

M70%
by M####:

it shows the rise, midday, sunset, middnight perfectly for the whole world

M70%
by M####:

I have made sundials for over 30 years. This is a very impressive app!

Q70%
by Q####:

Very good

M70%
by M####:

Good app

T70%
by T####:

Sunrise and sunset off by ~3 minutes.

M70%
by M####:

Wonderful app that integrates and works very well with my nexus 7. Satisfies my needs and saves lugging a laptop and GPS around! Thank you!

X70%
by X####:

The ugliest thing ever

T70%
by T####:

The ugliest thing ever

I70%
by I####:

Jk Good app

D70%
by D####:

Excellent Very good


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Rating Distribution

RATING
4.75
182 users

5

4

3

2

1