TileFocus is an innovative Android application designed to enhance your understanding of visual scanning in Mahjong. This lifestyle app allows users to input up to 13 tiles using either text or a visual tile editor. One of its standout features is the attention heatmap, which highlights areas based on suit contrast, tile position, and various combination patterns such as triplets, pairs, and sequences. Users can also benefit from a detailed attention distribution report, which provides insights into how observers typically scan their hands.

Additionally, TileFocus includes a discard decision assistant that offers before and after comparisons to help improve decision-making. The app also features visual search training to practice finding target tiles effectively, along with a reference for combination logic and algorithm explanations. All analyses are performed locally on the device without the need for eye tracking or external sensors, ensuring user privacy while enhancing gameplay.