GitHub - Mehedi-Hasan-Rooman/Android-Basic-Countdown-Timer: Basic Timer Apps. Its Has Start/pause/restart functions.
Egmy Basic Chess and Game Timer, Clock Digital Watch Timer - Walmart.com
555 Timer Basics - Monostable Mode
Amazon.com : Water Gear Basic Stopwatch - Water and Impact Resistant Sports Timer - High Precision Digital Stop Watch - For Workout Fitness Coaches, Sport Trainers, Referees and Athletes : Sports & Outdoors
My Timer Basic - Visual, Study, Homework Timer for Android - APK Download
The 7 best work and productivity online timers – RescueTime