Hily leverages its in-app messaging to create a relationship of trust with its users. Hily's first message is sent 2 minutes after the end of the onboarding. By doing so, the app creates a great communication channel from the beginning of the experience, that will be used to push promotions, product updates, etc. In order to create a relationship of trust with your users and potentially leverage on your in-app messaging system in the future to send promotions etc, you need to build trust around it.