This app was mentioned in 2 comments, with an average of 2.00 upvotes
I use Ovulation Calculator, and have been for years. It's a very simple calendar system and you can get a view of your whole year. It's recently gotten too many ads on it so despite it being incredibly accurate, I'm trying out other apps. It warns me when I'm about to have my period and when I am about to ovulate with push notifications. I did use Clue but I have no deleted it and rated it one star on Google.
So far (I'm only at 23 weeks) these are the ones I used and found helpful:
Android