Coding interview practice
Interview prep that fits in your pocket.
Five-minute sets of interview-style questions, built for your thumbs: tap the bug, put the code in order, handle the interviewer's follow-up. No laptop, no typing code on a phone keyboard.
Coming soon to the App Store
A free daily set every day. Pro has a 7-day free trial on the yearly plan.
Practice the real interview, not trivia
- Tap the bug. Find the broken line in real-world code.
- Put the code in order. Rebuild an algorithm line by line.
- Interviewer follow-ups. "Nice. Now do it in O(1) memory."
- Incidents and code reviews. What broke after the deploy, and which comment blocks the merge.
- Estimates. Storage, traffic and servers, the way design rounds ask.
- Answer out loud. Behavioral questions in STAR format, transcribed and checked on your phone.
Answers you can trust
- Every "what does this print?" answer is checked by actually running the code, in six languages.
- Every wrong option explains why it's wrong, so it can't trip you up in the real interview.
- Questions you miss come back the next day, then later, until they stick.
Free, every day
Ten fresh questions a day plus a question of the day, mixed from the languages and level you pick. Streaks, weak spots and progress by area are free too, along with one voice answer and five mistake reviews a day.
Inside: Python, JavaScript/TypeScript, Java and C++ · coding patterns · Big-O · edge cases · system design · behavioral · SQL · CS fundamentals.
InterviewGrind Pro
- Every deck and every question, including the harder trade-off and follow-up questions
- C# / .NET, plus five AI decks: LLM fundamentals, prompting and RAG, ML fundamentals, AI engineering and AI system design
- Ready-made interview tracks shaped like Big Tech, startup, data, infrastructure and AI engineering loops
- Your own question sets, picked from the whole bank
- Unlimited voice answers and mistake reviews
Yearly, 3-month and monthly plans. Prices are shown in the app in your currency. Cancel anytime in iOS Settings.
Questions
Is it free?
Yes. The daily set of ten, the question of the day, streaks and progress are free, with no time limit. Pro unlocks every deck, the interview tracks, your own sets and unlimited voice answers and reviews.
Do I need an account?
No. Open the app and start. Your progress stays on your iPhone.
Does it work offline?
Yes. Every question is in the app, so practice works on a plane or underground. Buying or restoring Pro needs a connection.
Is it a replacement for solving problems on a laptop?
No, it's the other half. Use your laptop for long coding sessions, and InterviewGrind for the five minutes in between: spotting bugs, knowing the complexity, and answering the follow-up.
Is there an Android version?
Not yet. It's iPhone only for now.
How do I cancel or restore Pro?
Manage or cancel in iOS Settings › your name › Subscriptions. On a new phone, open Progress › Restore purchases.
Support
Questions, a wrong answer, or something not working? Email fellowshiprealmsupport@gmail.com. In the app, "Report a problem" under any answer fills in the details for you.
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