At the moment, you can use one of the following ways to earn free hints:
a) Sharing about WordBrain on Twitter to get free hints but make sure that you have the Twitter app installed on your device and are signed into your Twitter account. Please note that as of now, you will receive hints only for the first 3 times you share on Twitter. You will not receive any hints if you share more than 3 times.
b) Rate the game on App Store / Play Store.
c) Completing a level in the game.
We know how much you love hints and we want to tell you that the product team is working on adding more ways for you to get free hints. Also we have some cool hint packs on sale which can be purchased in the app itself.