Timer - Programmable timer web app for gym workouts or stretching sessions

Show HN: Programmable timer web app (for gym workouts or stretching sessions)

Timer is a free, open-source web app that lets you create custom workout timers with programmable intervals, rounds, and rest periods. Perfect for gym routines, stretching sequences, or any timed activity, it offers a clean, distraction-free interface that works on any device with a browser. Built by Jan Heuermann, Timer is designed for simplicity and flexibility, allowing you to focus on your training without fiddling with complex settings. You can star it on GitHub and even self-host it if you prefer. Whether you're a fitness enthusiast or a professional coach, Timer streamlines your session planning with an intuitive, visual timer setup.