Comparison

IB Interview Questions vs 66 Days

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

IB Interview Questions

Prepare for investment banking interviews with over 1,000 questions, AI mock interviews, and in-depth guides. Master technical and behavioral aspects, plus brainteasers and essential reading lists. Learn anytime, anywhere.

Highlights
  • 1,000+ interview questions
  • AI mock interviews with feedback
  • In-depth finance guides
  • Fit interview preparation
  • Brainteaser challenges
  • Essential finance reading list
Read full description

IB IQ – Ace Your Investment Banking Interviews Prepare for Success in Investment Banking Interviews – Anytime, Anywhere! Welcome to IB IQ, the ultimate mobile app designed for aspiring investment bankers and finance professionals with 1,900+ interview questions and in-depth guides. Whether you're a student gearing up for your first investment banking interview or a seasoned pro looking to refresh your knowledge, IB IQ is your go-to resource for success. Key Features: - Extensive Question Bank: Access a comprehensive collection of 1,900+ investment banking interview questions, covering M&A, Private Equity, and more. Each question is expertly crafted and comes with detailed solutions to enhance your understanding. - Interview-Ready Guides (New!): Go beyond questions with 10 comprehensive guides covering key IB topics. Master Valuation, TMT, FIG, Healthcare, Energy, Industrials, Real Estate, ECM, DCM and Restructuring with structured reads and quizzes designed to build real expertise. New guides added regularly. - Fit Interview Prep: Beyond technical knowledge, succeed in fit interviews with our specialized section. Get insider tips, sample questions, and strategic advice to present your best self. - Brainteasers: Sharpen your analytical skills with a range of challenging brainteasers – a crucial part of any investment banking interview. - Essential Finance Reading List: Discover curated must-read books recommended by industry professionals to deepen your knowledge of investment banking and financial markets. Why IB IQ? - Learn on the Go: With IB IQ, your interview prep doesn't have to be confined to a desk. Prepare anytime, anywhere, right from your mobile device. - Quality Content at Your Fingertips: Our content is curated and created by industry experts, ensuring you get high-quality, relevant material. - User-Friendly Interface: We believe in simplicity. Our app is designed for easy navigation, making your learning experience smooth and enjoyable. - Continuous Updates: The world of investment banking is always evolving, and so is IB IQ. Stay ahead with regularly updated content. Target Audience: - Finance students aiming for a career in investment banking, M&A, or private equity. - Professionals in the finance sector seeking to brush up on their skills. Start Your Journey to Success Today! Download IB IQ now and take the first step towards acing your investment banking interviews. With IB IQ, you're not just preparing for an interview; you're gearing up for a thriving career in investment banking. By downloading IB IQ, you agree to our terms of service, as outlined in Apple's Standard EULA, available here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

66 Days

Master banking and consulting interviews with daily AI-powered practice. Track your progress on a 66-day journey with personalized feedback on technical, behavioral, and case questions. Improve your resume and gain confidence for top firms.

Highlights
  • AI interview coach with personalized feedback
  • Daily drills for behavioral, technical, and case questions
  • 66-day progress heat map
  • Resume checker
  • Excel and valuation tools
  • Analytics dashboard
Features
Read full description

66 Days Prep is an AI-powered career preparation platform designed to help candidates master interviews for banking and consulting roles through structured, daily progress. The app combines personalized coaching, habit tracking, and analytics to transform your preparation into a consistent 66-day journey. Each day you’ll train across behavioral, technical, cases or market-based questions while receiving instant feedback from an AI coach. The goal is simple — make interview mastery a daily habit. Your progress is visualized through a 66-day heat map that tracks consistency, focus, and improvement. Every session compounds your learning so that when interview season arrives, you’re confident, sharp, and ready to perform. Key features: • AI interview coach for personalized feedback on real questions • Daily drills in behavioral, technical, cases, and market news • 66-day heat map that tracks performance and consistency • Resume checker to strengthen clarity and impact • Excel and valuation tools for technical accuracy • Productivity features including timers and streak reminders • Analytics dashboard that highlights your growth over time Built by former bankers and consultants, 66 Days Prep mirrors real recruiting standards at leading firms such as Goldman Sachs, Morgan Stanley, McKinsey, and Bain. The app ensures that every minute spent practicing is focused on what matters most — structured thinking, confident delivery, and business intuition. Whether you are recruiting for your first internship, preparing for post-graduate consulting interviews, or advancing your career in finance, 66 Days Prep provides a disciplined path to daily improvement. Consistency is what separates good candidates from great ones. 66 Days Prep helps you build that consistency through smart repetition, clear feedback, and visible progress you can track. Build momentum, develop confidence, and master your interviews with 66 Days Prep — your AI career partner for banking and consulting success. Some features, including the AI interview coach, require a subscription. Please review our Privacy Policy at https://www.66daysprep.com/privacy. By using this app, you agree to the terms outlined in https://www.66daysprep.com/terms and https://www.apple.com/legal/internet-services/itunes/dev/stdeula/.

Screenshots

IB Interview Questions4 screens
66 Days4 screens

Verdict

The call

The clearest difference is review sentiment: IB Interview Questions at 80% against 66 Days's 50%. 66 Days's advantage is update cadence (every 10 days vs every 3 months) and rating (4.9 vs 4.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. IB Interview Questions sells 7 in-app purchases, starting at $9.99 per month and 66 Days sells 2 in-app purchases, starting at $15.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

66 Days holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: 66 Days has 228 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 80% of IB Interview Questions's written reviews are positive against 50% of 66 Days's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

IB Interview Questions ships an update every 3 months, 66 Days every 10 days. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

Scorecard4 real differences · 6 level
IB Interview Questions versus 66 Days: the parameters behind the verdict, then further details
ParameterIB Interview Questions66 Days
PriceFreeFree
Rating4.5 (13 ratings)4.9 (228 ratings) — better
Positive reviews80.0% of reviews — better50.0% of reviews
Number of ratings13228 — better
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS17.617.0 — better
Further details — not scored
Size101 MB110 MB
Age rating4+4+
DeveloperAlexis LentatiUru Technologies, LLC

Customer experience

IB Interview Questions

All ratings13 ratings
Positive84.6%
Neutral0.0%
Negative15.4%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

66 Days

All ratings228 ratings
Positive96.9%
Neutral1.3%
Negative1.8%
Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

In-app purchases

7 purchases

IB Interview Questions

Subscriptions3
  • IB IQ Premium (1 month)$9.991 Month
  • IB IQ Premium (3 months)$14.993 Months
  • IB IQ Premium (3 months)3 Days trial$19.993 Months
One-time4
  • 1 AI Credit$1.99
  • 3 AI Credits$4.99
  • 10 AI Credits$9.99
Show 1 more
  • IB IQ Premium (Lifetime)$99.99
2 purchases

66 Days

Subscriptions2
  • 66 Days Prep Pro$15.991 Month
  • 66 Days Prep Pro$49.991 Year

Questions

Is IB Interview Questions free?
IB Interview Questions is free to download, with in-app purchases available.
Is 66 Days free?
66 Days is free to download, with in-app purchases available.
Which has better reviews, IB Interview Questions or 66 Days?
66 Days is rated higher. IB Interview Questions averages 4.5 out of 5 from 13 ratings, while 66 Days averages 4.9 from 228 ratings.
Do IB Interview Questions or 66 Days have ads?
Neither IB Interview Questions nor 66 Days shows ads.
Which is updated more often, IB Interview Questions or 66 Days?
IB Interview Questions ships an update every 3 months, and 66 Days every 10 days. Most recently, IB Interview Questions was updated on September 17, 2026 and 66 Days on September 14, 2026.

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