Graft · built by Saul, age 15

I was revising harder, not smarter. So I built the fix.

I'm Saul. I'm 15 and deep in my GCSEs. I couldn't find a revision tool that actually worked the way I needed — so I built one. Graft drills me on real past-paper questions, marks me like an examiner, and tells me exactly what to revise next. It works. Now I'm opening it up.

Luna
your AI tutor · Physics
live
Past paper · Forces3 marks

A car of mass 1200 kg accelerates from 5 m/s to 25 m/s in 8 s. Calculate the resultant force acting on it.

S
a = (25−5)/8 = 2.5 m/s². F = ma = 1200 × 2.5 = 3000 N
L
3 / 3 ✓
Spot on. You found the acceleration first (2.5 m/s²), used F = ma, and kept the unit in newtons — that last mark is the one most people drop. Want a harder one?
90 seconds

Watch me actually use it.

A quick walkthrough of how I revise with Graft — picking a topic, getting drilled by Luna, and watching the mastery ring climb.

Saul's walkthrough — coming soon
What it does for me
01

It tells me what to revise

Every topic gets a mastery ring. Gold means it's locked in, red means do this one now. I stopped guessing what to study and started fixing what was actually weak.

02

It marks me like the real exam

Proper past-paper questions, marked the way an examiner would — then it tells me exactly which mark I dropped and why, in plain English. Not a score. A reason.

03

It makes it stick

It works out when I'm about to forget something and brings it back right before I do. The stuff I learn in March is still there in May.

04

It feels like the real thing

Full papers and a proper exam timer. Most of my marks used to vanish on technique and timing — practising under real conditions fixed that.

How it works
STEP 01

Pick a subject

Or let Graft pick your weakest topics for you.

STEP 02

Get drilled by Luna

She asks, marks, and explains — question by question.

STEP 03

Watch the ring go gold

Your mastery climbs as topics lock in. You can see it happen.

Early access

Want in before everyone else?

Drop your email and I'll save you a spot. I'll let people in a batch at a time.