Tempo Workout

If you're tired of switching between a metronome and a timer while exercising, this app is what you need.The idea is simple: you set the tempo you want to start with, your goal tempo, the step, and the app will start a metronome in several reps, interleaved by relaxation pauses.
You can set up all durations and time signature as well.
And besides that there's a voice assistant that totally eliminates the need of looking at the phone screen.
Building up speed, accuracy and endurance heavily depends on how systematic and persistent you are.
And Tempo Workout will help you a lot.