[luckylion]

Sure, complicated things can increase costs, but my impression is that a lot of the apps don't need to be "real apps", because they don't do anything mobile specific, they could be a webview + Wordpress because they're delivering content managed in a CMS, and plenty of them don't even work in airplane mode.

A company I work for just bought another company and I was asked to help them on their feet with their website. It's pretty much a standard Wordpress with a custom theme and maybe 300 lines of custom code in plugins. Their agency billed them north of 50k euros. I can tell they got ripped off because there's just nothing there that could conceivably take anywhere near that much work. I have little insight in the app-making process, so I can't tell if everything is just super complicated or app agencies just say "okay, this should be about 50 hours, let's quote 500 hours in case the client changes their mind on some details".