Everything students (and parents) usually ask before diving in.
Yes — Cell Biology is free to revise in full, including flashcards, quizzes, Quick Fire, and Block Genius. Other topics (Organisation, Infection & Response, Bioenergetics) are premium and unlock with a one-time in-app purchase.
GCSE App currently covers AQA GCSE Biology (Paper 1): Cell Biology, Organisation, Infection & Response, and Bioenergetics. More subjects are in development.
Yes. All flashcards, questions, and diagrams are bundled with the app, so revision works without an internet connection — you only need a connection to make a purchase.
Spaced repetition schedules a flashcard to reappear right around when you're about to forget it — sooner if you struggled with it, later if you knew it well. It's the same principle used in medical school and language-learning apps, and it means your revision time goes toward what you actually need to review, not what you already know.
Flashcards are for learning and recall — you self-rate how well you knew each answer, which drives the spaced repetition schedule. Quiz mode is exam-style multiple choice, for testing yourself under conditions closer to the real exam.
Quick Fire is a timed round — 12 seconds per question, testing recall speed. Block Genius is a matching game that automatically weights questions toward the topics you're weakest at, based on your flashcard history, so revision stays targeted even while playing.
Tap any locked topic and follow the prompt to purchase — this is a one-time payment handled entirely through Google Play Billing, not a subscription.
The app automatically checks Google Play for an existing purchase when it starts up, and restores premium access if it finds one tied to your Google account — no extra steps needed.
No. There's no sign-in or account system — the app just asks for a display name on first launch, stored only on your device.
Your progress, streaks, and scores stay on your device — no account, no server copy. The only exception is if you tap "Get AI examiner feedback" on a written answer, which sends just that answer to Google's AI for marking. No ads, no analytics tracking your usage either way. See the Privacy Policy for the full detail.
Yes — GCSE App works well as a recommended revision tool alongside classroom teaching. Each install is a single-user experience, so each student would use their own device.
Please email sadik.khan@gmail.com with the topic and question — accuracy matters a lot for a revision app, and reports get fixed quickly.