今日のカフェイン is an easy-to-use app that allows you to record your caffeine intake to prevent excessive consumption. With this app, you can easily keep track of your daily caffeine intake and see your previous intake time at a glance.

You can customize your daily caffeine limit to check if you are exceeding it. The app also displays your average caffeine intake over the past 7 days and 30 days.

The widget feature provides a quick view of your caffeine intake and previous intake time.

You can customize the list of beverages, allowing you to add your favorite drinks for easy recording. However, please note that the caffeine content provided for the pre-registered beverage list is approximate and may not be completely accurate.

Additionally, you can sync your caffeine intake with HealthKit, allowing you to manage your caffeine intake along with other health data.

Please note that the app requires permission to access HealthKit for writing data and reading HealthKit data for personalized advertising delivery.