It's funny how our expectations have changed. I am keen to like this app simply because of who it's from, Hog Bay, who made one of the first Mac apps that really inspired me to how different Mac software could be back in the 2005-ish era. That was WriteRoom, and I used it on my second-gen Intel running Tiger and Snow Leopard.
It was a blast from the past! I really enjoy looking at sites from that era - I'm thinking of setting up a proxy through the Internet Archive (several tutorials online) to use with my lampshade iMac running Snow Leopard.
UI, UX, websites, software -- it was a good time and we've lost a lot.
In 2007 it was $25: https://web.archive.org/web/20070202002238/https://www.hogba... (and crikey wasn't design beautiful back then? Look at that snapshot of web design history.)
That same $25 would, calculated by inflation, cost $35 now. Which is the price of this app, Bike.