GlassesOn is a mobile application that helps users measure their pupillary distance (PD) and check lens parameters using just their smartphone camera. It employs advanced AI technology to deliver accurate measurements, which are essential for ordering glasses online or ensuring a proper fit for current glasses.

GlassesOn offers a free version with basic features, including pupillary distance measurement. For more advanced features like detailed lens analysis or saving multiple measurements, a subscription or one-time purchase may be needed. Users should check the app store for the latest pricing details.

The measurements are generally very accurate due to the app's use of advanced AI and machine learning algorithms. Accuracy can depend on factors like lighting conditions and camera quality. For critical measurements, it is recommended to use the app in well-lit environments and follow the provided instructions carefully.

GlassesOn is compatible with most Android and iOS devices equipped with a camera. For optimal experience, it is suggested to use a device with a high-resolution camera and the latest operating system updates. Users should verify compatibility requirements in the app store.

While the app mainly measures pupillary distance and lens parameters, these measurements can assist in selecting the right glasses. Knowing your precise PD and lens details ensures proper fit and optical performance when ordering online. The app does not directly recommend styles or brands.