Rental Key Handover Log is an offline productivity tool for landlords, real estate agents, apartment managers, and property staff who need to track keys for rental units. It helps record house keys, access cards, mailbox keys, spare keys, and related handover details. No login, no network access, and no personal data collection are required. All records stay on the user's device. The app lets you create a key file for each property, record key numbers, quantities, holders, handover dates, deposit notes, and return status. It supports move-in, move-out, repair borrowing, lock changes, replacement keys, and temporary lending records. You can review overdue or missing keys, search historical handovers, and export PDF records to reduce omissions from paper logs. It is suitable for individual landlords, small rental agencies, long-term apartment operators, and property desk staff who maintain key records for multiple rental units over time.