What are the most useful paid App you've bought from Google Play Store, that can help you with your productivity?

This is an interesting question, I will share more from my POV with the Apple app store.

For me, I would say that the best app I've paid for so far are these two:

1) Calm App - Meditation

Been paying it for 2 years now and basically use it every night before I sleep or in the train while I take some time to breathe and calm down.

2) Verv Running App - Running

Been using this since the start of the year so that is around 3 months now, and it's been basically making me feel the urgency to run.

You can check these two apps out, basically, one for the mind, one for the body.