Big Timer is a free Android app developed by altoworks that offers a user-friendly and easy-to-see timer with big letters. With this app, you can easily countdown or count up for events, music performances, presentations, sports, and other activities.

The app allows you to choose from three screen display options: automatic rotation, fixed portrait, or fixed landscape. You can also change the display contents to show the timer only, timer and clock, or clock only. If you select "Clock only," the app functions as a digital clock with big letters.

Even if you switch to another app while the timer is running, the timer will continue in the notification area. You can also prevent the screen from turning off during operation.

Big Timer allows you to customize the color of the screen and letters to your liking. You can also receive notifications when there are 10 or 5 minutes remaining. The app offers various notification sounds and alarm options. Additionally, you can choose to receive notifications via screen blinking and set the sound volume.

Overall, Big Timer is a simple and practical app that offers customizable display options and useful features for various activities.