A JEE or NEET aspirant asks 300–600 doubts in a year from modules, DPPs and mocks. At coaching-app prices that is thousands of rupees. Here is how to do it for under ₹100 a month.
Options by cost
| Option | Cost | Speed | Handles module/mock questions? |
|---|---|---|---|
| Free solution banks | ₹0 + ads | Instant if present | Sometimes |
| Telegram/Discord doubt groups | ₹0 | Minutes to hours | Yes, quality varies |
| Coaching app doubt feature | Inside course fee | Minutes | Yes |
| Live tutor app | ₹500–1500/month | ~1 min | Yes |
| DoubtPay AI | ₹49 for 100 doubts | Seconds | Yes, with diagram + attempt check |
Monthly budget plan (₹49)
- Free bank first for standard questions.
- Your own attempt written fully; ask ‘check my attempt’ for the ones you got wrong (most learning per credit).
- Full explanation only for questions you could not start.
- Once a week, turn a weak topic into flashcards + mind map (1 credit).
Quality tips
- Always give the exam and chapter with the question.
- Photograph module questions cleanly; type numerical values if the photo is unclear.
- Verify final answers with the answer key; use the method, not just the number.
Why not only free groups
Free groups are great communities, but a wrong answer at 1 am before a mock costs more than 50 paise.
Related: best doubt app for NEET.
Stuck on a question? Ask it here and get a step-by-step answer in seconds — pay only per answer, no subscription. Ask your doubt now →
Stuck on a JEE or NEET question?
Type the exact question (or attach a photo), choose your class or exam and your language — Hindi, Hinglish, English or 9 more — and ask your doubt on DoubtPay AI. You get step-by-step working with a labelled diagram where it helps, and you can ask for a hint, an attempt check, practice questions or flashcards instead. No subscription: packs start at ₹9 for 15 answers, unused credits stay in your account.
Frequently asked questions
Is DoubtPay AI free to try?
You can try the animated tutor demo without logging in. Answers use credits, and the smallest pack is ₹9 for 15 answers. Failed answers refund the credit.
Which languages and exams does DoubtPay AI support?
Hindi, Hinglish, English, Bengali, Marathi, Tamil, Telugu, Gujarati, Kannada, Malayalam, Punjabi and Odia, for Class 6–12 (CBSE, ICSE, state boards), JEE, NEET, CUET, SSC, banking, railways, UPSC and state PSC.
Do credits expire or renew automatically?
There is no subscription and nothing renews automatically. Unused credits stay in your account while the service runs, and answers are kept in your history for 90 days.
Stuck on a question? Ask it here and get a step-by-step answer in seconds — pay only per answer, no subscription. Ask your doubt now →