> How did you get these users? They signed up on their own through the app or website?

Users install the app from an app store and sign up on their own.

> With such a small amount of users, you should collect a phone number and just call them.

I'm not sure what reason I'd give to ask for their phone number as using the product doesn't really need that. What do you think would be a good way to request users for their phone number during sign up, when the sole reason would be for me to contact them for feedback? I'm not averse to the idea, just can't think of a good way to ask.

> we had dummy tabs for promotions, competition, social media, and learning.

Wow, that's an exceptionally good idea. Something I can easily test out. Thank you!