For only mobile, in qa-plugin.php file, before registering the module add
if(qa_is_mobile_probably()){ qa_register_plugin_module( ... ); }
However,I am not sure if this is the right way.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.