Stop losing marks to the same mistake twice.
Your AI Study Agent turns every question you got wrong into a concept you have mastered. Snap a marked test and it adds each mistake, plans your day, writes fresh practice questions on the same idea and retests you until you prove you’ve got it — counting marks the way your exam does.
Free. No account. Your mistakes are stored on your phone; AI help is optional and sends only the question you ask. iPhone: join the list.
Four steps. About a minute per mistake.
Most marks aren’t lost on new questions. They’re lost on a question you already got wrong once, read the answer to, and forgot.
A question you got wrong in a mock, quiz or past paper — one, or a whole test at once.
Didn’t understand, forgot, careless slip, misread, ran out of time. Each gets its own fix.
Answer from memory, then reveal. A wrong answer restarts the schedule. At most 20 a day.
Closes only when the 7- and 21-day retests are right and you solve a fresh similar question.
Practice testing and spaced practice were rated the most useful of ten study techniques in a major review of learning research (Dunlosky et al., 2013). Retestly doesn’t promise better marks — it makes sure you actually do the retests, on the questions that matter.
When retesting isn’t working, it tells you.
Miss the same question on two retests in a row and it moves to Stuck. Instead of showing it a fifth time, the app helps you find out why: a gap in understanding, forgetting, misreading the question or a careless slip — and gives the fix that matches, from re-learning the idea to slowing down on the wording.
- Why you lose marks: concept, memory, careless, misread or time — with a fix for the biggest one.
- Recall trend: first-try recall over the last 14 days versus the 14 before.
- Exam mode: set the date and every retest fits before it.
- Study tasks: practice exams, assignments and your part of a group project, tracked subject by subject until they are done.
An agent that acts — not just a chatbot that answers.
The Study Agent works across all your mistakes, not one question at a time. You approve what it does with one tap.
- Snap a marked test. It reads every wrong answer and adds each one as a mistake to master — college internals, coaching mocks, past papers, any question bank.
- Plans your day. Due retests first, then the mistakes you keep missing, then your weakest subject — fitted before your exam date.
- Reaches out to you. A daily brief at your study time (retests due, minutes needed, marks at stake), an evening nudge only if retests are left, an exam countdown and a Sunday report of what you mastered. Worked out on your phone.
- Fresh practice questions. Retesting with the same question only tests memory. The agent writes a new question on the same concept.
- Marks at risk. Every open mistake is counted in your exam’s marks, so you see where today’s effort matters most. It measures your practice — it never promises an exam score.
- Guess rule. It follows your exam’s marking: in FMGE and USMLE there is no negative marking, so never leave a blank; in NEET PG even a blind guess averages +0.25; in GATE a blind MCQ guess is break-even until you rule out an option.
- Your language. English, Hindi, Telugu, Tamil, Portuguese, Tetum and Bahasa Indonesia — technical terms stay in English.
- Private. Your mistakes stay on your phone. The agent sees a short summary, never your saved photos, and nothing changes without your tap.
Why not just ask ChatGPT or Gemini?
Use them — they explain things well. But a chat answers the question you ask today. Marks are lost on the mistake you made last month and forgot. Retestly is built to close that loop.
| General AI chat | Retestly | |
|---|---|---|
| Remembers every question you got wrong, from any source | Only what you paste in again | Yes — each one stays open until mastered |
| Retests on day 1, 3, 7 and 21, with fresh questions | Only if you remember to ask | Automatic, with reminders |
| Proof of mastery | The feeling that you understood | Closes only after correct retests on separate days |
| Counts marks your exam’s way (FMGE, NEET PG, GATE) | Not by default | Marks at risk and marks recovered in practice |
| Tells you when guessing pays | If you ask | Built in for your exam’s negative marking |
| Plans today from your due retests and exam date | If you list everything each time | Every day, from your own mistakes |
| Reaches out before marks slip | Waits for you to open it | Daily brief, evening nudge, exam countdown, weekly report |
| Where your study data lives | In your chat history online | On your phone |
Coaching question banks sell you more questions. Retestly works with all of them — it makes sure the ones you got wrong never cost you marks again.
For the exams that matter.
Any subject where you answer questions and can check the answer.
| United States | India | |
|---|---|---|
| Medicine | Gen Chem, Biology, MCAT, USMLE Step 1 & Step 2 CK, NCLEX | MBBS, NEET-PG, INI-CET, FMGE |
| Engineering & maths | Calculus, physics, FE exam | B.Tech courses, GATE |
| Professional | CPA, bar exam, CFA | CA, CS, CMA |
| Entrance & government | GRE, GMAT, LSAT | UPSC, CAT, bank exams |
See where your batch is stuck — before the next mock does.
Students who join your class with a code share a summary from their phones: which topics are stuck, why marks are lost, recall trend and who needs a call. Works with the tests and DPPs you already run.
Re-teach
the topics the whole batch is stuck on — chosen from data each week, not instinct.
Call
students with many stuck mistakes or no activity, before results fall and they leave.
Show
parents a recall trend, not just a rank. CSV export for faculty reviews.
Find the gaps behind failure in gateway courses.
Calculus, chemistry, physics, anatomy: see which topics a section is stuck on, weeks before midterm grades — so instructors re-teach, tutoring centres plan workshops and advisers reach out early.
Students control what is shared.
Joining a class is the student’s choice, and they can leave any time.
Chosen display name; counts of open, stuck and mastered mistakes per subject; causes of lost marks; recall; retests this week.
Questions, answers, photos, notes, phone number, email or location. No grades are read from any school system.
Built for college students and adult exam candidates. Leaving a class deletes the student’s summary.
Start a free pilot.
Create a class in two minutes — you get a join code for students and a private dashboard link. Free during the pilot; launch pricing from ₹49 / $3 per student per month after it.
Questions
Is it free?
Yes, during the beta: mistakes, retests and challenge links are free, with up to 30 Study Agent messages and 20 AI tutor questions a day. A paid plan with more agent work (unlimited test-photo import, practice questions and a full plan to exam day) will come later; the core will stay free. Coaching centres and universities pay for class dashboards.
How is this different from ChatGPT or Gemini?
A chat answers what you ask, when you ask. The Study Agent keeps every mistake you make, retests you on a schedule with fresh questions, plans your day around your exam date and counts marks the way your exam does. Your study data stays on your phone.
Which exams and languages?
Exam profiles for FMGE (including Indian MBBS students in Timor-Leste), NEET PG, MBBS university exams, GATE, B.Tech / B.E. semester exams, USMLE Step 1 and Step 2 CK, US college courses and Timor-Leste university exams — and it works for any subject where you can check the answer. The agent explains in English, Hindi, Telugu, Tamil, Portuguese, Tetum or Bahasa Indonesia.
Who sees my mistakes?
Nobody, unless you choose. They stay on your phone. If you send a challenge link, people with the link see that one question. If you join a class, the teacher sees counts — never your questions or answers.
What does the AI tutor send, and can it be wrong?
Nothing until you turn it on. Then, only the mistake you ask about: the question text (and a smaller copy of its photo if you switch that on), your answer, the right answer, the subject and the chat so far. It passes through our server to an AI provider to write the answer and is not stored; the conversation is saved only on your phone. AI can make mistakes — check important answers with your teacher or textbook, and don’t use it for graded work you must do yourself.
Why 18+?
Retestly is built for college students and adult exam candidates. You confirm you are 18 or older when you start.
I used Student mode in LoopClosed. How do I move?
In LoopClosed, go to Settings → Back up everything. Install Retestly, then Settings → Restore from a backup. Your mistakes and retest history come with you.
Is the Android download safe?
It is the same app that is in testing on Google Play, signed by Kept Index LLC. Android will ask you to allow installs from your browser because it is not from the Play Store yet. Only download it from loopclosed.org; you can check the SHA-256 below.
Download Retestly.
Get Retestly on Google Play (open testing, free) in India, the Philippines and the USA. Anywhere else, including Timor-Leste, install it straight from this page. The iPhone version follows on the App Store.
Get it on Google Play Direct download (.apk)SHA-256: a21fa0165be17270718899ad188089c9612445cc330f7c2a692e1a20cc750a7f
How to install
- Easiest: tap Get it on Google Play and install like any app. Updates arrive automatically.
- Direct download (countries without Google Play access): open this page on your Android phone and tap Direct download.
- Open the downloaded file. If Android asks, allow your browser to install unknown apps.
- Tap Install. If Google Play Protect shows any warning, do not override it: install from Google Play instead, or email info@retestly.app and we will help.
- Open Retestly, confirm you are 18+, and snap three questions from your last test. Updating from 1.0.0? Install over it — your mistakes are kept.