Some say great products don't need marketing, but I think these great products have in built propagation mechanisms will help it spread. That is a form of in built marketing : word of mouth etc.<p>Apart from word of mouth/invites/shares, how else do you engage your users based on their behavior?
There's a good blog post from Nate at Picturelife on how he asks for app reviews: <a href="https://medium.com/@innonate/7-ways-to-ask-for-app-store-reviews-d4e4a74211cb" rel="nofollow">https://medium.com/@innonate/7-ways-to-ask-for-app-store-rev...</a><p>Outside of that, I recommend starting with a solid core story and brand experience. Arm your users with the story you want them to share with their world. Plant the seed across your product and marketing so they pick up the language you use and will share that from top of the minds.