GalleryPlanner turns the "guessing game" of gallery walls into a precise science. Unlike static tools, it features local AI: Auto-Layout for instant frame arrangements and Smart Fill (TensorFlow.js) for perfect photo-to-frame matching. It uniquely supports staircase walls and provides printable PDF Hanging Guides with exact measurements. Local-first architecture means your family photos never leave your device. The only tool that handles the math, the aesthetics, and your privacy.