O Clock is a free personalization app developed by PransuInc for Android devices. It offers a customizable clock widget and live wallpaper with multiple features to suit your style.

The app allows you to set the device's live wallpaper and customize the size of the clock widget to small, normal, or large. You can also choose the color of the clock and widget for text, second, date, and background. Plus, you can display the date, day, month, and second as per your preference. Moreover, you can change the font and color of the clock and set a label on it to make it more personalized.

Overall, O Clock is a simple yet efficient app that can add a personal touch to your device's home screen.