Retired Mathematician, owns source code in repository "bitbucket"for both iOS and Android platforms. This code, for which I provided the C-coding for the mathematical formula, requires to be accessed and put into form for posting on both Apple Store and Google Play Store as APPS.
Final result will be APPs in both Apple and Google Play Stores.
Prefer American or European fluent English. Reply to me, if you can perform this final step to obtain APPs. I will give you access to bitbucket to examine the files stored there as project "HouseGables". and "Sundown Geologique". Certain steps might require me to provide my developer's accounts in both Apple and Google. Some steps might require to provide "document electronic signing". I will suppose that you can do this. I will not be able to take responsibility for any coding. You should be able to re-construct the entire APP (6 pages) for viewing as a video. Summary: The APP provides a calculation of the magnetic compass heading of the position of the setting sun, just at sundown, for an input latitude, for all days of the year. I look forward to working with you. I am flexible regarding the completion date, but would hope for a limit of perhaps 2 weeks.