O LEVEL · AS · A LEVEL

Revise like it's
a game.

Real past papers with instant marking, bite-sized revision notes, timed exams, 1v1 battles and a Heads Up party game. All in one app.

YOYO astronaut playing with yo-yos
✅Correct! +1
⚡You won the 1v1
🎓Cells · 80% done
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🧬 Biology⚗️ Chemistry⚡ Physics📐 Mathematics📊 Accounting📄 MCQ papers✍️ Written papers🗓️ 2026 sessions 🧬 Biology⚗️ Chemistry⚡ Physics📐 Mathematics📊 Accounting📄 MCQ papers✍️ Written papers🗓️ 2026 sessions
Four ways to play

Pick a mode. Start learning.

No sign-up. Open a paper and go, or switch things up when revision starts to feel like revision.

Revision mode

Every topic, one tick at a time.

Choose your level and subject, open a topic and read short, clear notes on each concept. Check them off and watch your progress grow from concept to topic to subject.

  • O Level, AS and A Level content
  • Progress saved on your device
  • Colourful subject and topic cards
📚 ✏️
RevisionA/L
🍃Biology
68% complete
🧪Chemistry
42% complete
⚛️Physics
25% complete
∑Maths
54% complete
✓Fluid mosaic model
✓Active transport
Heads Up game

Put it on your forehead.

Hold the device to your head while friends describe the word. Tilt down when you get it, tilt up to pass. 60 seconds, as many as you can.

  • Uses motion sensors, no buttons needed
  • Great for study groups and classrooms
  • See every word you got and passed at the end
🍃 Biology🧪 Chemistry⚡ Physics
🎉 🙌
0:427 ✓ Gravity Got it! ✓ Pass →
⬇️ Tilt down · Got it⬆️ Tilt up · Pass
1v1 Versus

Race to the last question.

Get matched with an opponent and race through the same paper against the clock. Every right answer counts. Finish with a leaderboard and see if you beat your best.

  • Head-to-head, question by question
  • Tracks your games, wins and best score
  • Works offline, no account needed
🏆 🔥
🧑‍🚀
You8
VS
🦊
Zara6
Which gas is present in a greater amount in exhaled air than in inhaled air?
AOxygen
CCarbon dioxide ✓
1. 🧑‍🚀 You8
2. 🦊 Zara6
Exam mode

Make exam day feel familiar.

Sit a full paper under timed conditions, one question at a time. Get your grade straight away, then review every answer to see why it was right or wrong.

  • About a minute per question, like the real thing
  • Instant grade and percentage
  • Full review with "why not" explanations
⏱️ ⭐
Biology 5090/11⏱ 12:30
GRADEA
34 / 40 correct · 85%
Written papers

Write it. Get it marked.

Type your answer to any written question and AI marks it against the mark scheme. You see your marks and exactly which points you missed.

  • Structured papers laid out like the original
  • Diagrams and figures included
  • A mini lesson for every part
✍️
Q3 (b)3 marks
Enzymes are denatured at high temperature because the active site changes shape so the substrate no longer fits.
2/3Nearly there!
Missing: no enzyme–substrate complexes can form.
And everything else

The little things that help.

📄

Real past papers

Multiple choice and written papers from recent sessions, laid out like the real thing.

✅

Instant marking

Tap an answer and know straight away, with your score building as you go.

💡

Mini lessons

Simple or detailed explanations, key facts and a tip for every question.

🔊

Read aloud

Listen to explanations hands-free. Works offline, great on the go.

🔍

Search by topic

Find every question on a topic in a paper in seconds.

🤔

"Why not B?"

Got it wrong? See why your choice was wrong, not just what was right.

3Levels: O, AS, A
5Subjects
4Game modes
FreeNo sign-up

Great things come back around.

One question at a time. One loop at a time. YOYO is free on iPad and Android.