Under Door Camera segmentation by application delineates three primary end‑use categories: residential, commercial and industrial. The residential segment comprises private homes, apartments and gated communities where the device is deployed to monitor entry points, deter intrusion and integrate with home‑automation hubs. Its broad diffusion, driven by heightened consumer awareness of burglary risk, accounts for roughly 55 % of total market revenue. The commercial segment covers retail outlets, office buildings, hotels and small‑scale warehouses; installations focus on loss prevention, employee safety and compliance with access‑control policies, contributing an estimated 30 % of sales. The industrial segment is confined to large‑scale manufacturing plants, logistics centres and critical infrastructure sites, where under‑door cameras are integrated with supervisory control systems to monitor high‑traffic ingress and support predictive maintenance, representing the remaining 15 % of market size. These application partitions collectively define the demand curve, with each proportion reflecting distinct procurement cycles, budget allocations and regulatory influences and strategic considerations.