HOTmate is a lightweight holdover time (HOT) calculator designed for quick use during winter operations. It provides a clean, pilot-friendly workflow: select the aerodrome, enter basic weather and temperature inputs, and get a clear HOT result with the relevant condition and intensity classification. Key features include: Fast, simple inputs with an interface optimized for mobile use. Offline operation β no account, no network required. Built-in precipitation/intensity logic to help interpret common winter weather scenarios. Clear, readable results with an emphasis on speed and usability. Dark mode for comfortable use in low-light environments. HOTmate is built for rapid cross-checking and situational awareness, with a focus on reliability and a minimal, distraction-free design.