Regrettably many replies in these matters begin this way, "I don't have an iPad
...StarPilot will probably be the best choice and will make CelNav a lot easier if you're not inclined to use paper and pencil.
If your machine can run xls spreadsheets Peter Hakel has made many spreadsheets for Celnav, et al.
Interactive Spreadsheets for Celestial Navigation
They're free but take some "getting used to" in terms of entering coordinates. But, they're great programs.
Also, a perfect Sun sight reduction spreadsheet can be obtained here;
Excel Sight Reduction Spreadsheet for Astro Navigation.
Erik Deman has all of the Nautical Almanac information on his site.
Celestial Navigation: Contents
You can get HO 249 Volumes 1, 2 and 3 here;
Fair winds and clear skies.