It is very easy to use, it's simple but effective! I like how you can predict your anemic state (low or high) as well when taking iron supplements with this app/website which has been helpful for me in my daily life since i am always busy so having everything at one place was great!! Also sometimes there are some errors that could be corrected easily however nothing major here just minor things such us not being able of making multiple predictions per day etc., would definitely recommend trying