Screenlint

Screenlint checks the interface of an iPhone app without needing source code. You upload a zipped simulator build from React Native, SwiftUI, UIKit or Flutter, and it runs the app on simulators, capturing screens in light and dark mode, at large text sizes, and on an iPhone Duo.

The report is written for engineers, with screenshots, the location of each issue and a severity from critical through to polish. It catches broken layouts, clipped text, controls under the crease, missing VoiceOver labels and dark-mode contrast problems.