No you don't have to install freeserve for each user. I recommend you set an Administrator account which you control and set everyone else with limited accounts. This will mean they can't un-install/install programs without your permission.
iPhone X review
How to find a font: Discover the name of a typeface with these apps
The best iPhone for 2017
Les meilleurs logiciels de montage vidéo gratuits (en 2017)