Coding interview practice for iPhone
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.
Free daily set, every day. Pro has a 7-day free trial on the yearly plan.
Try it here
Three questions. About a minute.
The same questions and explanations as the app. Wrong answers are the useful part.
Formats
Practice the real interview, not trivia
- Tap the bug
Find the broken line in real-world code.
- Order the lines
Rebuild an algorithm, line by line.
- Follow-ups
"Nice. Now do it in O(1) memory." The chain the interviewer actually asks.
- Incidents & reviews
What broke after the deploy, and which review 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.
Interview tracks · Pro
Prep for the loop you're actually facing
Ready-made sets weighted toward what each company's interviews are publicly known to focus on.
- Google-styleAlgorithms, Big-O and design at scale
- Meta-styleFast coding rounds and feed-scale design
- Amazon-styleLeadership stories and reliable services
- Apple-styleLanguage depth, memory and OS basics
- Netflix-styleSenior design, reliability and judgment
- Microsoft-styleCoding fundamentals and clean objects
Plus loop tracks: Big Tech onsite · Startup loop · Data & SQL · Systems & infra · AI engineer loop
Independent practice modeled on publicly described interview formats. Not affiliated with or endorsed by any company named.
Answers you can trust
Checked, explained, remembered
Free and Pro
Free every day. Pro when you're serious.
Free
- Ten questions a day plus a question of the day
- Python, JavaScript/TypeScript, Java, C++, SQL, patterns, Big-O, edge cases, system design, behavioral, CS fundamentals
- Streaks, weak spots and progress by area
- One voice answer and five mistake reviews a day
Pro 7-day free trial
- Every deck and every question, including the harder trade-off and follow-up questions
- C# / .NET and five AI decks: LLMs, prompting and RAG, ML, AI engineering and AI system design
- Company-style and loop interview tracks
- Your own question sets, picked from the whole bank
- Unlimited voice answers and mistake reviews
Yearly, 3-month and monthly plans, priced in your currency in the app. Cancel anytime in iOS Settings.
FAQ
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.
Are these real questions from Google, Meta or Amazon?
No, and be wary of anyone who says theirs are. The tracks are modeled on what those interviews are publicly known to cover (the topics, formats and level), so you practice the right mix. InterviewGrind isn't affiliated with any of these companies.
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.
Get the launch email
One email when InterviewGrind is on the App Store. Nothing else, ever.
We store your email only to send that one message, then delete it. See the privacy policy.