Countdown Timer is an app that allows users to create stylish countdowns for any event in the future or past. The app offers a range of features, including an online gallery with hundreds of free images, live backgrounds with motion, a timeline view to visualize events in time, and a countdown editor for customization. Users can set reminders that trigger before or when an event happens, and select one or more of the following units for each countdown: seconds, minutes, hours, days, working days, weeks, months, and years. The app also offers repeating countdowns for recurring events like anniversaries, a full-sized widget and small widget to display a countdown on your home screen, and the ability to share as images or short videos.

Users can count down to any special date, including Christmas, a birthday, New Year 2023, or their next road trip. They can also set a past event and count the time since, allowing them to see exactly how old they are or for how long they've followed their diet or stayed sober. The timer is precise to the second, and users can enter immersive mode by double-tapping for a full-screen experience. The app includes two widgets, one that shows countdowns just like they are shown in the app and the other that shows a smaller countdown.

The app also offers premium features, including notifications with alarms, unlimited countdowns (the free version limit is 10), no ads, more font options and text colors, and backups. The app requests permissions to read the images users pick for backgrounds, display non-invasive ads and for the online background gallery, and for in-app billing for the optional Time Until Premium upgrade. The shortcut permission is only for future versions of the app that may use it. Users are encouraged to suggest any feature they'd like to see in future updates and to rate the app if they like it, as it helps a lot.

Overall, Countdown Timer is a useful app for anyone who wants to keep track of important events and milestones in their life. With its range of features and customization options, it offers a fun and easy way to create stylish countdowns that can be shared with friends and family.