Plugin Compatible and Lightweight?

Hi,

we have a pretty big Website with its Plugins. We try not to put every Plugin that exists for our Services. We do a lot of by our own.

We put your Code in our Footer and it is working very well. Of course it would be nice to send Notifications directly from our WordPress Backend.

Is it safe to use? I know it´s hard to tell without knowing any details from our Installation… We still have php v5.5 – could this be a problem? How about the caching (WPRocket)? We are on another Language – did all the editable text on your Site under Settings. Will they still be in this language? Because your Plugin is not?

Thanks for your answers!
Mikkel