Roof Calc: Shingle Estimator is a utility application designed for iPhone that helps users calculate the number of shingle squares, bundles, and associated materials needed for roofing projects. The app focuses on providing estimates based on standard roofing measurement units, allowing users to input roof dimensions or area to determine material quantities. It is developed by Wenhao Zhang and is available as a free download on the App Store, with in-app purchases for additional features. The app’s primary function is to simplify the estimation process for roofing materials, which is typically used by contractors, builders, or homeowners planning roof repairs or installations. Users can enter roof measurements to receive calculations for squares (a roofing unit equal to 100 square feet) and the corresponding number of shingle bundles, as well as other material requirements. The app is designed exclusively for iPhone and has not been verified for macOS compatibility. According to the developer, Roof Calc: Shingle Estimator does not collect any data from users. The app’s privacy practices indicate that no user data is gathered, though this information has not been verified by Apple. The app has received a single rating of 5.0 on the App Store. Recent updates have focused on performance improvements, minor optimizations, and fixes, including a correction for an issue where the keyboard could remain open on the input screen. Accessibility features have not yet been specified by the developer.