Comparison

66 Days vs Desk Dojo

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

Head to head
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/.

About

Desk Dojo

Master Excel and business finance through interactive lessons, drills, and quizzes. Learn practical skills with over 170 lessons, track your progress with XP and achievements, and practice offline. Start for free with full access to beginner content.

Highlights
  • Interactive lessons and quizzes
  • 170+ lessons across Excel and Finance
  • Drills for speed and confidence
  • Daily Speed Challenge game
  • Progress tracking with XP and achievements
  • Offline functionality
  • Free beginner content
Read full description

Practice investment banking and consulting interviews with an AI interviewer, and learn Excel and Business Finance in the same app. You can start for free without an account. INTERVIEW PREP: INVESTMENT BANKING An AI interviewer asks the standard IB interview questions and follows up on what you say. You record your answer, or type it. Composure is graded from the pauses, restarts and recoveries in your audio, and each answer is labeled Held, Recovered or Froze. Clearly wrong finance is flagged. • Mock interviews with follow-up questions, up to 3 a day. • Technical rehearsal: say a classic walkthrough, such as a DCF, and get graded against the key points. • Behavioral rehearsal: rehearse your stories and build a story bank for the standard fit questions. • Lessons and drills across 7 IB topics, from accounting to LBOs, 487 questions in all. • Set your interview date and a daily plan paces what to learn, drill and rehearse until then. INTERVIEW PREP: CONSULTING An AI interviewer runs a full case. It shows you exhibits and gives some numbers only when you ask for them. You are graded on how you opened, whether your plan fit the problem, how you read each exhibit, whether your math was right, and your final recommendation. • Case interviews: 8 cases covering profitability, market entry, market sizing, pricing and M&A, up to 3 a day. • Spoken practice for structuring, market sizing and case math, graded against the key points. • Fit and PEI rehearsal: rehearse your stories and build a story bank. • Lessons and drills across 7 consulting topics, 122 questions and 245 drills in all. • The same daily plan covers this track, paced to your interview date. The app asks for microphone access the first time you record. Audio goes to Deepgram for transcription and is deleted, and the transcript goes to OpenAI for grading. Feedback is AI-generated practice, not career advice, and no app can promise you an offer. LEARN EXCEL AND FINANCE Excel has four worlds: • Foundations • Building Blocks: sorting, filtering, pivot tables and charts • Intermediate: text, date and number functions, Excel Tables and conditional formatting • Power User: dynamic arrays, multi-sheet workflows and formula troubleshooting Business Finance has four worlds: • Accounting & Financial Statements • Corporate Finance • Markets & Equity Investing • Fixed Income & Derivatives DRILLS AND PROGRESS Drills cover keyboard shortcuts, formula building, term recall and classification, with timed rounds and a daily speed game. Lessons and drills earn XP, and practicing each day builds a streak. There are nine ranks from Intern to Chairman, and achievements to earn. Lessons and drills work offline. AI practice needs an internet connection. FREE TO START World 1 of Excel and World 1 of Finance are free. So are the accounting topic in banking and the Case Room topic in consulting, with their drills. The first two structuring lessons, eight case-math drills, two graded spoken answers per account, the daily interview plan, beginner drills, XP and streaks are free as well. TWO SEPARATE SUBSCRIPTIONS Desk Dojo Pro covers all Excel and Finance content, every drill difficulty, certificates and prestige. The annual plan has a 7-day free trial. Interview Prep covers mock interviews, case interviews, spoken practice and every topic in both tracks. The two are sold separately, and you can cancel either one at any time. Privacy Policy: https://deskdojo.co/privacy Terms of Service: https://deskdojo.co/terms Support: support@deskdojo.co

Screenshots

66 Days4 screens
Desk Dojo4 screens

Verdict

The call

66 Days and Desk Dojo both sit at 4.8 stars, but that hides the real split: 100% of Desk Dojo's written reviews are positive against 50% of 66 Days's. Desk Dojo also leads on iOS requirement (15.1 vs 17.0). 66 Days's advantage is ads (none vs shown) and ratings volume (259 vs 20). On price, rating, update cadence and in-app purchases 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. 66 Days sells 2 in-app purchases, starting at $15.99 per month and Desk Dojo sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Desk Dojo holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 66 Days has 259 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 50% of 66 Days's written reviews are positive against 100% of Desk Dojo's.

UpkeepUpdate frequency

66 Days ships an update every 10 days, Desk Dojo every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
66 Days versus Desk Dojo: the parameters behind the verdict, then further details
Parameter66 DaysDesk Dojo
PriceFreeFree
Rating4.8 (259 ratings)5.0 (20 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings259 — better20
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size110 MB52 MB
Age rating4+17+
DeveloperUru Technologies, LLCDesk Dojo

Customer experience

66 Days

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

Desk Dojo

All ratings20 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

66 Days

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

Desk Dojo

Subscriptions3
  • Desk Dojo Pro Monthly$4.991 Month
  • Interview Prep$19.991 Month
  • Desk Dojo Pro Yearly7 Days trial$29.991 Year

Questions

Is 66 Days free?
66 Days is free to download, with in-app purchases available.
Is Desk Dojo free?
Desk Dojo is free to download, with in-app purchases available.
Which has better reviews, 66 Days or Desk Dojo?
Desk Dojo is rated higher. 66 Days averages 4.8 out of 5 from 259 ratings, while Desk Dojo averages 5.0 from 20 ratings.
Do 66 Days or Desk Dojo have ads?
Desk Dojo shows ads; 66 Days does not.
Which is updated more often, 66 Days or Desk Dojo?
66 Days ships an update every 10 days, and Desk Dojo every 2 weeks. Most recently, 66 Days was updated on November 5, 2026 and Desk Dojo on October 31, 2026.

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