Apps like Best Typing Lessons and Test emphasize teaching the correct finger placement from the start, which helps in developing good typing habits.

TapTyping - Typing Trainer, the mobile typing app helps users practice while on-the-go making it ideal for commuters who want to practice typing during their downtime.

Typing Trainer has a collection of step-by-step tutorials that covers everything from sentence drills, introduction to new keys as the lessons progress, and skills test.