Gift Diary helps users store and track all gifts, vouchers, and souvenirs they have received throughout their lives. Each gift is saved in a separate file with information about the giver, time of receipt, usage status, experience history, and related notes, helping users avoid forgetting items they own or missing out on vouchers that are about to expire. The application provides an intuitive gift management system with smart filters, usage statistics, periodic reminders, and expiration alerts specifically for vouchers. For offers that are about to expire, the system will proactively remind users and help them choose to use them through the Voucher Spin feature to minimize waste. A special feature of Gift Diary is the Gift Garden, where each gift becomes a seed. The more a gift is used and cared for, the more beautiful the seeds will grow into blossoms. Conversely, items left neglected for too long will cause the garden to wither, motivating users to appreciate what they have received even more. In addition, the "Reply Reminder" feature helps remember birthdays and important occasions of the giver, proactively suggesting appropriate times to send thank-you notes, reciprocate gifts, or maintain connections with those who have shown them care. Through the combination of item management, effective voucher usage, and preserving the value of relationships, Gift Diary is not just a place to store gifts, but also a diary that helps users appreciate the gifts and the people behind them.