The SEB tool is a great open source solution that solves many issues for schools, students, and instructors--easily integrates with Moodle (just 1 click for instructors to require the use of the SEB!) and runs on Windows, Mac, iOS, and even Chromebooks!
The Chromebook version is not "official", but if you follow Colin Matheson's brilliant instructions it works like a charm:
With academic integrity in short supply these days, the more we can discourage mindless cheating and encourage learning from mistakes, mastery learning, etc. the better off our students will be prepared for the future where making mistakes is encouraged, developing a growth mindset, perseverance, grit, etc. is a win-win for everyone!