Question: Can you recommend a service that provides APIs for in-app rewards and currency management to boost user engagement?

If you're looking for a service that offers APIs for in-app rewards and currency management to increase user engagement, Gamify Everything could be a good fit. This API-based service lets developers quickly add gamification elements, including In-App Currency, XP and Levels, and Punch Cards. It's designed to keep users engaged by offering rewards and tracking progress, and can be integrated with a few API calls.

If you also need a platform that offers a broad range of APIs, Pipedream is worth a look. It lets developers build complex applications with more than 2,100 APIs available, including options for in-app rewards and currency management. With low-code and no-code interfaces, it accommodates a range of developer needs.

For a more comprehensive tool, Userpilot offers a range of features for personalizing in-app experiences, including guided user onboarding, product analytics and contextual Microsurveys for feedback. It's designed to drive growth metrics at every stage of the user journey and is good for a variety of use cases, including customer retention and product-led growth.