This migration took one person about seven days using Daily's reference docs. By following the new transition guide, the implementation time could be reduced to as little as four days. SimplyDoc is a starter kit that can be used as a quick start to building a custom telehealth application. The migration process involved changing the backend and frontend components of the application from OpenTok to Daily. The key steps included identifying creation of OpenTok sessions and tokens, replacing OpenTok session connection logic with Daily room join logic, removing OpenTok-specific code for handling participant state, developing UI component(s) to manage video and audio tracks for call participants, and finally replacing OpenTok events with Daily events. The migration was made possible by using Daily's reference docs and demos, as well as the OpenTok transition guide provided by Daily.