Comparison

ConsMath 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

ConsMath

Practice mental math and business case interview skills with this app. It offers daily exercises for precise or estimated answers, and includes market sizing tasks. Regular practice is key for improvement.

Highlights
  • Mental math questions
  • Business case interview context
  • Market sizing tasks
  • Daily practice exercises
  • Precise or estimated answers
Features
Read full description

We perfectly understand how difficult it is to devote time to train yourself for case interviews and tests when you are busy with university assignments or you have another job. Remember that as well as with the other skills the regular practice is critical. Bit by bit, but every day! That’s why we created ConsMath, the app that you can use at least several minutes a day by solving: - Mental Math question: with precise or with estimated/approximate answer - Mental Math questions in business and other case interview contexts - Bank of market sizing tasks We are actively improving the app adding new tasks and features, stay tuned!

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

ConsMath4 screens
66 Days4 screens

Verdict

The call

ConsMath and 66 Days both sit at 5.0 stars, but that hides the real split: 100% of ConsMath's written reviews are positive against 50% of 66 Days's. ConsMath also leads on monetization model (free vs freemium) and iOS requirement (13.0 vs 17.0). 66 Days's advantage is ratings volume (228 vs 5). On price, rating, ads 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. ConsMath sells 1 one-off in-app purchase 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

On the App Store both sit at effectively the same score — 5.0 for ConsMath against 4.9 for 66 Days. That said, the two scores are not equally well evidenced: 66 Days has 228 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 100% of ConsMath's written reviews are positive against 50% of 66 Days's.

Scorecard4 real differences · 6 level
ConsMath versus 66 Days: the parameters behind the verdict, then further details
ParameterConsMath66 Days
PriceFreeFree
Rating5.0 (5 ratings) — better4.9 (228 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings5228 — better
Update frequency—Every 10 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size1 MB110 MB
Age rating4+4+
DeveloperAleks GeldashUru Technologies, LLC

Customer experience

ConsMath

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

66 Days

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

In-app purchases

1 purchases

ConsMath

One-time1
  • Full Access$3.99
2 purchases

66 Days

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

Questions

Is ConsMath free?
ConsMath 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, ConsMath or 66 Days?
ConsMath is rated higher. ConsMath averages 5.0 out of 5 from 5 ratings, while 66 Days averages 4.9 from 228 ratings.
Do ConsMath or 66 Days have ads?
Neither ConsMath nor 66 Days shows ads.

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