What M-o-M growth is good enough?

At Localazy, as one of our key metrics, we use "active apps". It means that the user has created an account and a new project and invested enough time to integrate with our service. It contains a big commitment and willingness to, at least, try the service.

We have 50+% month-on-month growth with some spikes reaching more than 100% growth for some months.

What would you consider a growth rate that is good enough?