programming C C++ CPP sundials sun dials
For no obvious reason except for completeness, there are a
couple of programs using the free BASIC programming system
for the Android:-


Read the notes on this BASIC page because where
you place the above file(s) is not where HELP in
X-11 BASIC says you should.
Illustrating Time's Shadow
ISBN 978-0-9960026-0-8
Lib Cong 2014904839
Merges Illustrating Shadows and Illustrating More
Shadows, deletes duplicated material, and
techniques that are complex and replaced by
easier methods, adds new material.
Hands on, empirical, geometric, trigonometric, CAD,  and spreadsheet dial design
for small dials plus garden dials using common masonry supplies, clay, and glass,
with emphasis on many calendar line techniques, and inclined decliners, while
providing details on the use of DeltaCAD programming including the animation of
many sheets as parameters vary.  Case studies abound with associated problems
solved, and cover the infamous inclined decliner, as well as all the other kinds of
outdoor dials.
The illustratingShadows.xls spreadsheets have been
here for smartphones, specifically the Android
smart phone spread sheets here
Tools for the Android
Useful tools for the diallist using an Android:-

1.     SPIRIT LEVEL PLUS (also free) by
Androidka. The calibrate function works
better than for other spirit levels I have

2.     Compass Pro   by Mobile Essentials
A bit more functional than other
compasses I tried

3.     a clock widget

I have the Calendar and Calculator on the same page
as these tools, as well as the weather.

Always ensure you calibrate the compass and
spirit level. Test any tools you use to make sure
they work for you and on your cel phone.
Similarly, test the spreadsheet you decide to use
especially to see if it updates automatically, or
whether you must tell it to redraw, and if you
must redraw, see how many times you must
have it redraw so all formulae are recalculated.
NOTE: smart phones dont use .ZIP files
Try "Sol Et Umbra" for Androids
Excel for the Android