I’ve written about Spark a bunch here on Uncorrected. It’s been my iOS and iPad OS email client of choice for many years.
Spark recently moved over to Windows, which was fortuitous because I was already a subscriber. The Windows version was unveiled alongside the 2.0 Spark for Desktop release, which was a marked departure from the original, and widely loved, Spark on the Mac. For one thing, it’s an electron app. Spark jettisoned many beloved features in creating Desktop, and moved to a subscription model.
On Windows, Spark was slow. I’m talking unusably slow, from a painfully long launch to sluggish performance in normal use.
But since a recent update, I’ve found Spark on Windows to be snappy, and the calendar feature is pretty much perfect for my needs.