Screenlint

Screenlint checks your iPhone app’s UI/UX without needing source code. Upload a zipped simulator build (React Native, SwiftUI/UIKit, or Flutter). It runs the app on iOS simulators and checks screens in light and dark mode, at large text sizes, on iPhone Duo (folded and unfolded), and reads the accessibility tree.

You get a report engineers can act on with screenshots, issue locations, and severity from critical to polish. An optional recommendations tier explains how to fix each issue. It catches broken layouts, clipped text, controls under the crease, missing VoiceOver labels, and dark-mode contrast issues. Screenlint is in early access. Request access for a private upload link by email.