Use Playable Ads to show potential users the key features of the app: choosing between two profiles, swiping left or right, meaning you would consider meeting them in real life or not.
Most dating apps have in-game currencies, offering access to premium features like viewing all the profiles, sending gifts to users you like, highlighting your page or boosting your ranking. Show a potential user how the bonuses in the app work and what advantages do they give. Grab users' attention offering in-game currency as a reward for installing the app.