by Daniel Palou.
Hello,
local_mobile is indeed Moodle Mobile Additional Features. You can find the installation steps in here:
https://docs.moodle.org/27/en/Moodle_Mobile_additional_features
Regarding Pamela's question, the plugin is updated everytime a Moodle Mobile version is released. You can find the downloads for every version in here:
https://moodle.org/plugins/pluginversions.php?plugin=local_mobile
Cheers,
Dani