Olive Tree is a mobile app development company that specializes in Bible study apps. The company was founded in 2000 and is headquartered in San Francisco, California. Olive Tree's apps are available on iOS, Android, and other platforms, and are used by millions of people around the world. The company's apps include a range of features, such as multiple translations, note-taking, and highlighting. Olive Tree has won numerous awards for its apps, including the Bible App of the Year award in 2010. The company was acquired by HarperCollins Christian Publishing in 2019.