Opisthograph 777 is a free Android application designed for runners to enhance their training experience. The app features a local running timer that allows users to start, pause, and stop their runs with a single click, while providing real-time updates on duration, distance, and pace. Users can save each running record, which is automatically archived for later review, making it easy to track progress over time.

The application also includes a running calendar that visually displays daily records, allowing users to click on specific dates for detailed insights. Additionally, comprehensive data statistics charts provide an overview of total running time, frequency, and average pace over various time periods. Each running record can be customized with notes on weather and route, and the app supports local backup and recovery, ensuring that users can manage and review their exercise history efficiently.