"Human.io lets you create micro-apps for mobile devices which are lightweight and easy to write...Human.io micro-apps run on the human.io mobile app for Android and iOS. You can use our API to interact with users, present a simple UI, and retrieve feedback. For instance, a simple activity that allows users to create and answer challenges for photos around a theme is around 100 lines of code." #geeky #interesting #free #api #Software #development #mobile #mechanical_turks #pub