Best I could find.

All in all a very good typing app.
Different games, which are very funny.
Different themes: Safari, Time travel, Countries of the world.
Achievement like Location sessions are great for motivation.

Very important for me: You can create own tests and texts with symbols that are from other languages than english, e.g. for me important is üäöß! All other apps I tested until now couldn’t do that.

Graphic is old, but has its arcade charm.
Not possible to make full screen, it’s always like 800 x 600 even on the Thunderbolt display, but since I can increase the font, it is not a big of a deal.

Viktor Lexington about Typing Instructor Platinum, v21.0