DrSilva
At the moment all 3rd party plugins and behaviors are not allowed in the Arcade. There are no exceptions to this.
The plugin doesn't use any methods or other libs outside the Construct engine, so it should be usable for all platforms. However, I haven't used the plugin on any mobile phone platform yet, so I can't say for sure.
If the plugin wouldn't for, any reason, not work on a different platform, it shouldn't be too much of a hassle to write your own timer and remove the plugin, as long as you structure your project properly.