AskTutor.ai

AskTutor.ai is a browser-based AI tutor that answers study questions across STEM and humanities, letting students upload notes, quizzes, or PDFs so it can pinpoint weak spots and explain concepts one step at a time. It's aimed at students (including ESL and international learners), teachers, and online/self-directed learners who want personalized, on-demand help without the cost or scheduling of a human tutor. Its main differentiator is adaptive gap-analysis that tracks progress and stops re-teaching mastered material, delivered free with no signup required.