IGCSE Physics 0625: AI Tutor

Big revision-skills update. Every new feature is free. Mark-scheme AI marking — tap "Explain with tutor" on any missed past-paper or quiz MCQ to get a mark-scheme breakdown without typing a single word. Command Words trainer — practise the 8 highest-frequency Cambridge command words (state, define, describe, explain, suggest, calculate, compare, identify) against real AI-generated questions, marked examiner-style. Mistake Journal — every wrong answer collects in one searchable surface with a "Recalibrate" filter for questions you felt sure about. One-tap "Explain with tutor" on every entry. Multilingual Glossary — 40+ science terms translated into Urdu, Hindi, Tamil, Arabic, Bahasa Malay, and Mandarin alongside the English. Confidence probe — Bjork-style metacognition check between each answer and its reveal, with Calibration insights surfaced on Progress. Sleep-positive reminders — late-evening reminders silenced past 10pm so they don't compete with sleep. Tuned for Cambridge IGCSE Physics 0625 / 5054.