Rizz! is an app available on the App Store that helps you come up with quick responses. You can upload a screenshot of your conversation and Rizz will generate personalized replies for you to choose from. It can be used for various purposes such as writing emails to your boss or trying to impress your crush. Some users have found it helpful in boosting their dating game by using its AI-generated responses for chats and pick-up line feature for dating app profiles.