I use Fantastical on my iPhone and I really like it.  It's not amazing or anything.  Up until now they have charged a hefty (single) price for the upgrade (like $40+), so I've always tried to wait for a sale.  Now that they are moving to a subscription-- for a simple calendar app (as nice as it may be), it's no, heck no, no chance in hades that I will fork over $5/mo for this.  Hands down this is a non-starter.  While I think they make very quality software, and they deserve to be paid for their time developing and maintaining it, there's zero chance I will subscribe monthly/indefinitely for a one-trick-pony app like this.  Get a clue AgileBits.  Bring back the single app fee.  I will gladly fork over $40 bucks or so for this app.  But no more subscriptions, please.  By comparison, Microsoft Office 365 works out to $5.83/mo and comes with 6 apps and 2 services.  So AgileBits is clearly greedy and out of their minds on this.