Those that use the standard versions of Goodnotes for growing minds/education need locks/parent control features. More recently Goodnotes added Ai and math assist which while I could see the benefits of these features, without having locks or parental controls added the student/child would always have the answer at their fingertips. Never having to learn to do math problems, Spelling, ect. on their own. With Locks/pin required for special features it would giver the owner the ability to use as needed.