Twenty-Four Hours a Day is an Android app developed by BookMobile in the Education & Reference category. It is a daily guide for those in recovery from alcohol or drug addiction. The app offers daily thoughts, meditations, and prayers that have become a stable force in the recovery of many individuals worldwide. It is based on the Sanskrit proverb, "For yesterday is but a dream, and tomorrow is only a vision." The app contains the Serenity Prayer, the Twelve Steps, and the Twelve Traditions of Alcoholics Anonymous, which can help users relate the Twelve Steps to everyday life and find the power to stay sober.

The app has a user-friendly interface with features like the ability to access today's reading by pressing the "Today" button, swiping forward or back to access more daily readings, and sharing the daily reading with friends by e-mail or text. Users can also bookmark their favorite meditations, easily return to them, and search all 366 daily readings. The app also sends a notification every day to remind users to read the daily meditation and allows them to jump to a specific reading using the calendar button. Users can set their preferred font size, and choose between light or dark mode.