Practice mode — tap your answer. 1st wrong: red, hint appears, try again. 2nd wrong: correct goes green, insight shown.

Mock exam — correct answer revealed immediately on wrong answer. Navigate freely.

Progress bar — every question shown as a square. Blue=unanswered, green=correct 1st time, orange=needed hint, red=incorrect.

Dev shortcut — triple-tap the title for a 3-question test run.