Here are some articles in our Support Center you may find interesting:
Tutorial: Use Cloud Image Recognition on Android with the CraftAR SDK: https://support.catchoom.com/customer/en/portal/articles/1892221-tutorial-use-cloud-image-recognition-on-android-with-the-craftar-sdk
Tutorial: Set up an Android project with CraftAR Image Recognition and Augmented Reality: https://support.catchoom.com/customer/en/portal/articles/1891850-tutorial-set-up-an-android-project-with-craftar-image-recognition-and-augmented-reality
If you were curious about something else, please specify your question a bit more so that we can help in more detail.
The Catchoom Team