How CodinzHub Works: Coins, Referrals and Unlocking Questions
CodinzHub is a completely free coding-interview prep platform built on real online assessments and interview experiences shared by college students. Students from IITs, NITs, IIITs, BITS, Manipal and many more institutes use it to find company-wise OA questions, interview experiences and placement data. This guide explains how the coin system works, the free ways to earn coins, where your balance lives, and how the Premium pages fit in — including the CGPA cutoffs, CTC data and previous-year questions they hold.
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CodinzHub is a completely free coding-interview prep platform built on real online assessments and interview experiences shared by college students. Students from IITs, NITs, IIITs, BITS, Manipal and many more institutes use it to find company-wise OA questions, interview experiences and placement data. This guide explains how the coin system works, the free ways to earn coins, where your balance lives, and how the Premium pages fit in — including the CGPA cutoffs, CTC data and previous-year questions they hold.
In this guide
- Completely free to use — no subscription or paid plan
- Coins unlock questions, resume reviews and projects
- Three free earning routes: referrals, contributions and requests
- What Premium adds: placement data with CTC, CGPA cutoffs and PYQs
CodinzHub in one paragraph
CodinzHub collects real OA and interview-experience data from students and turns it into practice material: coding questions with editorials, company pages with question and experience tabs, and project ideas. Start at the Problem Set to practise, or open the Companies directory if you already know your target. Everything on CodinzHub is free to use: there is no subscription, no paid tier and no locked section. Students from IITs, NITs, IIITs, BITS, Manipal and many more institutes use it to research companies and practise real OA questions.
What coins are and what they unlock
Coins are in-app credits. You spend them to unlock individual items, and every price is shown on the item before you unlock it.
| What you unlock | How it is priced |
|---|---|
| Coding questions | The listed coin cost on each question |
| Resume review | A configured coin amount |
| Interview experiences and project access | The price displayed on the item |
Every new account starts with a welcome balance. Your current balance and full coin history live on your dashboard.
How to earn coins for free
- Refer friends: copy your personal invite link from the Refer & Earn card on your dashboard. You earn coins for each friend who signs up with it, and they receive a welcome balance too. There is no cap on invites.
- Contribute content: share an OA question or interview experience on the Contribute page. Approved interview experiences earn coins — the contribution guide shows the structure reviewers look for.
- Answer requests: fulfil an open assessment request from another member on the Requests page and earn coins each time. The Requests walkthrough explains how to raise one that gets answered.
Tip: already signed up without a referral link? You can still enter a referral code on the signup form.
Coins vs Premium: what is the difference?
Coins work item by item: you unlock one question, one resume review or one experience at a time. Premium is a separate, completely free layer: the college-wise placement data page covers CTC, CGPA cutoffs and eligibility criteria, and the resources page holds OA patterns and previous-year questions (PYQs). The full breakdown is in our Premium guide.
Where to go next
- Explore CodinzHub — every page, every company tab and the shortcuts worth learning
- College email signup help — if your domain is rejected at signup
- Reading OA formats — coding, MCQ and full-paper rounds
- The 12-week roadmap — a realistic plan from campus to SDE-1
Keep track of what you’ve learned.