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ODK Collect

:dfn:`ODK Collect` is an open source Android app that replaces paper forms used in survey-based data gathering. It supports a wide range of question and answer types, and is designed to work well without network connectivity.

ODK Collect renders forms into a sequence of input prompts that apply form logic, entry constraints, and repeating sub-structures. Users work through the prompts and can save the submission at any point. Finalized submissions can be sent to (and new forms downloaded from) a server.

Collect supports location, audio, images, video, barcodes, signatures, multiple-choice, free text, and numeric answers. It can even accept answers from other apps on your device. :doc:`See a complete list of supported question types here. <form-question-types>`

String input form widget, displayed in ODK Collect on an Android phone. The label is "What is your name?"

Single-select (radio button) form widget, displayed in ODK Collect on an Android phone. The question label is "What is your favorite fruit?" After the question is a list of fruits.

Learn more about ODK Collect