Photograph your mistake
Snap the question you couldn’t solve. Its subject, topic and objective are identified in seconds — you fill in nothing. The free plan gives you 8 credits a day.
iPhone · English and Turkish
Don’t forget your mistakes — close them
Snap the question. Mendum tells you why you got it wrong — missing knowledge, a misconception, carelessness, or a trap. Then closes the gap with questions built for that mistake.
Coming soon to the App Store
New accounts get a 21-day free trial — no credit card required.
A mistake closes in three steps
- 1
Snap
Photograph the question you got wrong. Its subject, topic, objective and the option you marked come out in seconds — you fill in nothing.
- 2
Understand
The root cause lands in one of four categories, then the step-by-step solution follows. You see exactly where you went off.
- 3
Close
New questions on the same objective are generated. Solve it right on two different days and the mistake turns “Learned” and leaves your notebook.
Mistake Anatomy
This is the real work: not recording the mistake but classifying it. Tap the cards.
On every plan
Learn why you got it wrong
Every mistake falls into one of four causes: knowledge gap, misconception, carelessness, or falling for a trap. Over time your repeating pattern surfaces.
Step-by-step solution
A short summary first, then the full walkthrough. If the option you marked was wrong, you also see exactly where you went off.
Your mistake library
Every mistake you save is organised by subject and objective. Stats and your report card show where to study next.
Re-solve your questions
You can re-solve the questions you saved any time. This is free on every plan.
What Smartbook adds
Unlimited credits
With Smartbook the daily analysis and solution limit disappears. On heavy study days the counter never stops you.
New questions made for you
Brand-new questions on the same objective, written around your interests. You never memorise one question — you actually learn the topic.
Repeat until the mistake closes
Solve it correctly on two different days and the mistake closes as “Learned”. The Review Engine brings it back right as you start to forget.
Free-response scoring
Your AP free-response (FRQ) answer is scored criterion by criterion, showing exactly which points you lost.
Priority queue
At peak hours requests are queued. Smartbook users jump the queue, so results come back sooner.
Plans
Notebook
Free- 8 analyses or solutions per day
- Mistake diagnosis — which of the four causes?
- Step-by-step solutions
- Notebook, statistics and report card
- Unlimited re-solving of saved questions
Smartbook
21 days freeEverything in Notebook, plus:
- No daily analysis or solution limit
- Personalized practice questions
- The review engine that closes each mistake
- AP free-response (FRQ) criterion scoring
- Priority queue
Subscriptions are managed through the App Store and can be cancelled at any time.
Frequently asked
Where do my photos go?
Your question image is sent to Google’s AI service for analysis and stored against your account. A consent sheet explains this before your first scan; analysis does not run until you accept. See the Privacy Policy for details.
Which exams are supported?
Turkey’s YKS (TYT/AYT) and AP. For AP, free-response (FRQ) answers are scored criterion by criterion against the rubric.
How far does the free plan go?
You get 8 analyses or solutions a day. Your notebook, statistics and re-solving saved questions are unlimited on every plan.
What if I don’t cancel the trial?
The 21-day trial is an in-app trial and asks for no credit card; it never converts into a charge on its own. Only you can start a paid subscription.
Can I delete my account and data?
Yes. Profile → Legal → Delete Account removes your account and data permanently, right inside the app — no need to contact anyone.
Is there an Android version?
iPhone only for now. Android is planned.
Don’t make the same mistake a third time
Keep your notebook — let Mendum track which mistake you make and why.
Coming soon to the App Store