Comparison

ReTrader 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

ReTrader

Simulate trading major historical financial events to understand market movements. Engage in short trading scenarios, compete on leaderboards, and gain insights from experienced traders. Subscribe for weekly analysis and mini-games.

Highlights
  • Trade historical financial events
  • Simulate market movements
  • Analyze profit/loss
  • Global trading competitions
  • Weekly analysis subscriptions
  • Leaderboard rankings
Features
Read full description

ReTrader allows users to trade major historic financial events exactly as they happened. ReTraders see first hand how markets moved and how they would have traded live, as the news unfolded. The App invites users to trade scenarios like the collapse of Lehman Brothers, Black Wednesday, or the release of major economic data, and you will be able to react to those events by buying or selling depending on whether you think the market will go up or down The objective of ReTrader is to help you understand how and why markets move, as each scenario is previewed and reviewed by an experienced trader, and you can at all times see the profit or loss of your positions. ReTrader condenses each scenario into short 3-5 minute simulations for you to engage with. Every time you play a game for the first time, we will record your score on a leaderboard where you can compare your performance to other users. ReTraders can enter into global trading competitions or use the APP to keep up-to-date with the current events by choosing to sign up to our subscriptions, which will give you our analysis in the form of mini-games on a weekly basis. If you have any questions, email us at: answers@retraderapp.com

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

ReTrader4 screens
66 Days4 screens

Verdict

The call

The clearest difference is rating: 66 Days at 4.8 against ReTrader's 3.0. 66 Days also leads on update cadence (every 10 days vs every 2 months) and ratings volume (258 vs 2). ReTrader's advantage is review sentiment (82% vs 50%) and iOS requirement (13.0 vs 17.0). 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. ReTrader sells 10 one-off in-app purchases 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, 4.8 against 3.0. That said, the two scores are not equally well evidenced: 66 Days has 258 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 82% of ReTrader'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

ReTrader ships an update every 2 months, 66 Days every 10 days. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.

Scorecard5 real differences · 5 level
ReTrader versus 66 Days: the parameters behind the verdict, then further details
ParameterReTrader66 Days
PriceFreeFree
Rating3.0 (2 ratings)4.8 (258 ratings) — better
Positive reviews81.8% of reviews — better50.0% of reviews
Number of ratings2258 — better
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size36 MB110 MB
Age rating4+4+
DeveloperFintratech LimitedUru Technologies, LLC

Customer experience

ReTrader

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

66 Days

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

In-app purchases

10 purchases

ReTrader

One-time10
  • ECB Interest Rate 2013$0.99
  • Fiscal Cliff 2012$0.99
  • Taper Tantrum 2013$0.99
Show 7 more
  • Flash Move 2010 - Available Soon$0.99
  • Biggest equity move of 2014$0.99
  • Swiss Remove FX Floor: EURUSD$0.99
  • Swiss Remove FX Floor: GOLD$0.99
  • Swiss Remove FX Floor: Swiss Stocks$0.99
  • Russia and ECB - Sep 2014 - Dax$0.99
  • 2 Month Subscription$14.99
2 purchases

66 Days

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

Questions

Is ReTrader free?
ReTrader 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, ReTrader or 66 Days?
66 Days is rated higher. ReTrader averages 3.0 out of 5 from 2 ratings, while 66 Days averages 4.8 from 258 ratings.
Do ReTrader or 66 Days have ads?
Neither ReTrader nor 66 Days shows ads.
Which is updated more often, ReTrader or 66 Days?
ReTrader ships an update every 2 months, and 66 Days every 10 days. Most recently, ReTrader was updated on October 29, 2026 and 66 Days on October 23, 2026.

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