Free AI exam prep
AI exam prep — free practice tests, AI grades and explains every answer
Free online exam prep forever: university finals and high school mock exams, AI-graded with explanations for every wrong answer. Got your own exam? Upload it and start practicing.
What is free AI exam prep on LOSAN?
LOSAN is an online AI exam-prep platform: a bank of THPT mock exams from specialised schools and provincial education departments across Vietnam (Math, Physics, Chemistry, Biology, Literature, History, Geography, English, Civic Education) plus university finals such as Philosophy, Political Economy and Introduction to Law. Upload a PDF, Word file or photo of your own exam to prep for anything.
You take a mock exam as if it were the real thing; AI grades every question and pinpoints where you went wrong so you revise the right spots instead of studying everything.
Exam prep — what you gain, what you lose
What you gain with LOSAN
- ✓ Real school exams: Mock exams from education departments and specialised schools, aligned to the latest THPT structure
- ✓ Detailed AI grading: Every question scored, showing exactly where you slipped — not just an answer key
- ✓ Free daily: Free mock exams every day, no login required to start
- ✓ Know your weak spots: Per-subject score breakdown so you know what to revise first
What you face with the old way
- ⚠ Paper-based practice: You finish and check answers yourself, never knowing why you got it wrong
- ⚠ Scattered revision: Without knowing your weak spots, you study everything and waste time
- ⚠ Outdated papers: Last year’s exams, not aligned to the newest structure
- ⚠ No essay grading: Written answers go unread, so you never know your real score
Tips to practice effectively
1. Simulate the real thing
Time yourself exactly, no looking things up, to see your true level.
2. Read the AI feedback
Do not just look at the score — read what the AI flags to spot the question types you miss.
3. Target your weak points
Take a few exams, check the per-subject breakdown, then focus on your weakest subject.
Why prep for exams with AI?
The exam comes once a year, but you need a mirror before that day. Mock exams on LOSAN show your current level and what to fix right now — instead of waiting until grading day to learn where you are weak.
From departments and top schools
Shows exactly what you missed
Practice every day
How it works
Pick a subject and a mock exam from the library
Take it like the real thing, timed
AI grades and points out each mistake
Review the score breakdown and rework your weak spots
FAQ
Frequently asked questions
Yes — mock exams and AI grading are free, with no features locked behind a plan. Without an account you can still take any exam and get 3 AI gradings a day; sign in for unlimited grading.
High school exams come from provincial education departments and schools across Vietnam, aligned to the latest graduation exam structure. University exams are created and shared by students for those who come after.
Yes — the library already has general-education subjects like Philosophy, Political Economy and Introduction to Law. Have your own study guide? Upload it and AI turns it into a graded practice test.
Yes, AI reads and grades written answers, showing how to improve your response.
Yes, the interface is mobile-first — practice anytime, anywhere.
Reviews
What learners on LOSAN say
Minh
Grade 12 student
"I take a mock exam on LOSAN every week — the AI shows exactly where I slip, so I revise with focus."
Lan
Class of 2027
"The exams match the real structure; after each one I know my weak points per subject."
Hung
Specialised-school student
"Essay grading is my favourite part — no more checking the answer key myself."
Start AI exam prep — free
Pick a subject, take a mock exam and get AI grading right away — no complicated signup.