For little utility apps where you don’t care to deviate from UI default appearance and behavior (and, as a user, it’s much better if you don’t anyway, though it’s very trendy to make UX worse by customizing everything) iOS and Android both are dead simple, very easy to write and maintain a utility app for either of them.

An enormous amount of the cost of developing a lot of native apps is customizing the appearance and behavior, to match some slide deck mockup or to make it “on-brand” or whatever. It’s better for the user, and way cheaper, if you just… don’t do that. Hell a lot of common UI elements are easier in native than web if you just don’t try to customize them a ton (data-backed tables and list views and such are sooooo nice)