Nana Heroes is a free Android app developed by Exa Apps that offers a flexible way to earn extra income. The app is designed for those who want to make money in their free time by shopping or delivering groceries for Nana Direct customers.

When a customer orders groceries from Nana Direct, the app assigns the order to a nearby shopper or deliveryman. The app uses your location to assign appropriate orders for you, so it is necessary to allow the app to access your location even when it is closed. However, the developer states that they do not use your location for advertising purposes.

Overall, Nana Heroes is a useful app for those looking to supplement their income. It is easy to use and provides a flexible way to earn extra cash. The app is available for free on the Google Play Store.