Here are some free tools which can be used on any computer, tablet or smartphone.
Your device will need a quality browser (Chrome, Firefox, Safari...) for the calculators to work properly.
Four Pillars Calculator
Calculate Four Pillars charts, including luck periods.
Link (for bookmarking): https://www.fourpillars.net/ipod4p.php
Feng Shui Calculator
Calculate Flying Stars charts , with or without Replacements Stars:
Link (for bookmarking): https://www.fourpillars.net/mobfs.php
Nine Star Ki Calculator
Calculate Nine Star Ki chart and Ming Gua Number:
Link (for bookmarking): https://www.fourpillars.net/mob9ki.php