Smoking Log is an iPhone app designed to help users record their smoking habits efficiently. With a simple and intuitive interface, users can easily input smoking instances by pressing the + button. The app displays the elapsed time since the last smoke, graphically represents the total number of cigarettes per day, and offers 12 theme colors for customization. Additionally, Smoking Log supports Apple Watch application integration, making tracking even more convenient.

This lifestyle app, developed by hideko ogawa, requires no login, ensuring user privacy. It is structured to be versatile, serving purposes beyond smoking tracking, such as functioning as a stopwatch and a counter. However, users are advised that all recorded data is stored solely within the application and cannot be restored upon deletion. Data migration is recommended via iPhone's backup/ restoration when switching devices.