$0forever
- 15 AI analyses per week
- Math + Reading & Writing mistakes
- Mistake library & basic progress
- Offline capture (AI queues online)
- No sign-up required
#1 Mistake Engine for SAT
Stop repeating mistakes. Start improving your score.
You missed the question — but not why. That's the real problem.
Add any Digital SAT mistake in Math or Reading & Writing. AI names the error type, explains the concept, and builds a study plan — not just another chat reply.
No sign up · 15 free AI analyses per week
See real SAT difficulty — live
Switch between Math and Reading & Writing at real SAT difficulty.
Full review flow
- Analysis
- Explain
- Improve
- Concept
- Plan
Mistake ReviewFull demo
Question
A café sells muffins and coffee. Three muffins and two coffees cost $18.50, and two muffins and three coffees cost $19.00. What is the cost of one coffee, in dollars?
A) $2.50B) $3.50C) $4.00D) $4.50
AI Analysis
74% ConfidenceAI confidence reflects how sure the model is about your error-type diagnosis, based on question clarity and the answer you selected.
Diagnosissystem setup error
Your WorkLet m = muffin, c = coffee3m + 2c = 18.5 and 2m + 3c = 19Subtracted equations incorrectly → c = $4.50
Correct Way3m + 2c = 18.52m + 3c = 19.0Eliminate m → c = $3.50 (choice B)Substitute back — both equations balance
Add mistakes three ways
Use photo OCR, gallery upload, or type/paste. You can edit the extracted question before the same five-step AI review.
1 · Best StartTake PhotoSnap the question, then confirm your answer2 · AI OCRUpload ImageScreenshot or gallery photo3 · ManualType or PasteFrom Bluebook, PDF, or practice sites
Photo and upload use OCR first, then the same AI review flow as paste.
Study streaks keep you consistent
Each day you review at least one mistake, your streak grows. Small daily wins beat cramming — the Today tab tracks your streak and plan completion.
3-day streak
Open Today →Review one mistake today to reach day 4.
How it works
Four steps from a missed question to a higher score.
Free vs Pro
Start with 15 AI analyses per week — enough for a full mock-test review session. Upgrade when you want unlimited runs and sync.
$9/ month
- Unlimited AI analyses
- Sync across phone & laptop
- Priority analysis queue
- Weekly weakness report
- Mock-test analysis burst packs
Zero Sign-UpStart instantly
Math + R&W AIReal SAT difficulty
Personalized PlanFocus weak areas
Offline FirstWorks anywhere
Study StreaksDaily consistency
Offline vs Online
Add mistakesAvailableAvailable
View saved mistakesAvailableAvailable
Basic statsAvailableAvailable
AI analysisQueuedAvailable
Sync across devicesNot availablePro
Frequently asked questions
Clear answers for students, parents, and search engines about SAT AI mistake review.
- What is sat.xingai.app?
- sat.xingai.app is a free SAT prep web app by XingAI. You add practice questions you got wrong, pick your answer, and AI explains why you missed it, which concept to review, and what to study next.
- How do I use SAT AI mistake review?
- Add a mistake by photo, image upload, or pasted text, select your answer (A–D), then run Analyze with AI. You get analysis, explanation, improvement tips, concept review, and a study plan—five linked review screens.
- Is SAT.XINGAI.APP free?
- Yes. You can start without signing up. The free plan includes 15 AI analyses per week (resets Monday). Saved mistakes and basic stats work locally in your browser.
- Can I use photo and upload on a phone browser?
- Yes. On a phone browser, Take Photo opens the camera and Upload Image opens your gallery or file picker. The app extracts the question with AI OCR, then asks you to confirm the text before analysis.
- What SAT subjects does it support?
- The app is built for Digital SAT practice across Math and Reading & Writing. Mistakes are organized by subject so you can focus weak areas over time.
- How is this different from generic AI chat?
- It is structured for SAT workflow: capture mistake → diagnose error type → explain the concept → suggest improvement → build today's plan and track progress—not a one-off chat reply.