Gym Timer Pro - Interval

The Gym Timer (100% free)
NO Ads, NO subscriptions, NO in-app purchase

Built for the author himself to use this app for his workout.

You can count down or count up.
You can have up to 3 workout items.
You can configure WORK, REST, and SETS for each workout by simply dragging it.
You can configure the ready time before the workout in the Settings.

Enjoy the workout!

I will update the app frequently!