Gym Rest Timer alternatives

In short, I don't think there has been a timer software that is both GOOD-LOOKING, EASY-TO-USE, CROSS-PLATFORMED and has a STRONG ENOUGH fullscreen focus mode, until wnr is here. What's the best of all? It's amazingly FREE, no charge, no in-app purchase.

Timed is an interval-based workout timer app. You can set workout and rest time as you workout, or create pre-defined workout sessions. It also has a companion Apple Watch app that displays readings like calories, heart rate, workout name, current set, etc.

Reminders to take breaks. Sync your schedule with your friends or colleagues so you can hang out during your breaks together.

Workout app built for people who know what they are doing. Build your own voice-guided workouts and listen to your own stuff while exercising Plan your workouts for the week and never ask "What do i train today?" Track your progress and adjust your plan