I'm going to repeat that Fantastical does 95% of what Superpowered claims to do. And Fantastical has features that Superpowered clearly does not have, such as a really good natural language mechanism for event and task creation. And subscription costs are less. https://flexibits.com/fantastical
Flexibits' weakness is engineering, though. They could get eaten by a competitor that works its way up to a full calendar with a stronger foundation. Fantastical 3's move upmarket in response to Calendar.app improvements hasn't been easy for them so I don't know how much further they could push themselves. That's not to say that a new competitor will put Flexibits out of business, but if the market for calendar manag…
This also exists on macOS and WatchOS, but I think it existed in iOS first.