A "what is my face shape" app is an application that helps users identify their face shape and provides recommendations for hairstyles, makeup, glasses, and fashion based on their face shape. These apps use advanced AI technology to analyze a users uploaded photo or capture a photo using the devices camera to detect facial features such as face shape, face length, and jaw type. The app then provides tailored suggestions for hairstyles, makeup, and glasses that will enhance the users features and complement their style based on their face shape. Some apps also offer fashion tips and celebrity lookalike suggestions.

There are several "what is my face shape" apps available on both the App Store and Google Play Store, such as "Find Your Face Shape", "Hiface - Face Shape Detector", and "FaceShape". Users can choose a front-facing picture or capture a photo using their devices camera, and the app will analyze their face shape in seconds. Some apps offer in-app purchases to unlock additional features or remove ads.

It is important to note that face shape recognition is subjective, and factors such as weight change and aging skin can drastically change the shape of a persons face. Therefore, it is recommended to re-determine ones face shape periodically before picking a pair of glasses or trying out a new hairstyle.