After looking at the web page (wow, this is a nicely designed app!), I read a bunch of comments being annoyed at the price, so I went to check, expecting something ridiculous - and it’s $30, with a free trial‽
At least for people in the US this is, like, two meals at a fast casual restaurant. It’s four hours work even at the depressingly low federal minimum wage. The Mac to run it on cost a thousand dollars. It’s way less than someone into this hobby will spend on paper and glue if they’re making more than a couple of models.
Depresses me that people see so little value here.
I wouldn’t buy it at any price because I’m not, and don’t want to get, into papercraft, but it’s a fair price.
Unfortunately the Apple App Store set an incredibly low floor of "free" or $0.99 when it launched. Whether companies were just trying to get customers or Apple was subsidizing things, the expectation is an "app" is cheap and disposable.
$30 is eminently reasonable for this kind of thing. And it isn't a subscription! But it costs more than a morning coffee so impulse is restrained and some people just don't like being restrained.