Best calendar app (iOS/Mac)

So I need a new calendar. I had Sunrise for iOS and it only worked 10% of the time. I would put in 2-4 appointments at a time and if I had to check to see what I had going on during the week, sometimes it would have everything listed but a lot of the time it was gone. Just gone.

I saw the best apps for iOS/Mac on The Verge's Christmas post but was seeing what other Apple users were using. Should I go with Fantastical? The Mac app is $20 freaking dollars! Is it worth it? I can deal with the iOS app as it is only $2.99 but if the default iOS app will suffice, then I won't waste the money.

What do you guys think?