Fitness Timer - Android: Makes interval training Easter that ever!

Hey

I recently published an android app on Google play store.
I would love to hear your comments about it, but also how i can make it better in future updates.

The app is a interval timer, which makes taking intervals when doing sports very easy.
Fitness Timer changes background color, depending on which interval is in progress. But also tells the current interval progress with sounds, like:
“Workout starting”
“Work”
“Rest”
“Workout done”

This makes it very easy to connect it to a speaker, and use it for e.g hiit training, curcuit training etc.

Here is a link to the app:
https://play.google.com/store/apps/details?id=com.whitestudios.fitnesstimer&hl=da