I think Ovia has an Ovulation app too.. I use the Ovia pregnancy one and I love it! I haven't checked out the ovulation one but I'm sure it's about the same with tying to get pregnant. Best of luck !
try the glow app, it's great for ttc and offers you many educational tips. I'd advise you stay away from the community though. those ladies can be rude but the app itself is great. you should also try the one @junebaby2k16 recommend