禁煙カレンダー - 卒煙をサポートするタバコ記録アプリ is a simple app designed to support smoking cessation by allowing users to track their smoke-free days on a calendar. Developed by Taro Horiguchi, this free app is available for iPhone users in the Lifestyle category, specifically under Health & Fitness.

The concept of the app is straightforward. If you manage to stay smoke-free for a day, simply press the "+" button in the app and mark the corresponding date on the calendar. By visualizing your progress and achievements, you can stay motivated and experience a sense of accomplishment.

As the developer of this app, I recently succeeded in quitting smoking myself. While it has only been about three months, I cannot definitively say the long-term effects. However, this app has been instrumental in my journey, and now it's your turn to give it a try.