Comparison

Sci 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

Sci

Explore STEM concepts and problem-solving skills through hands-on activities tied to real-world locations. Search activities by site, STEM field, or curriculum standards. Activities are categorized for pre-visit, during-visit, and post-visit engagement.

Highlights
  • Hands-on STEM activities
  • Location-based exploration
  • Searchable by site name
  • Filter by STEM field
  • Curriculum standard alignment
  • Pre/during/post visit activities
Features
Read full description

This Sci-Map app encourages the exploration of STEM concepts right in your own community and promotes the practice of problem-solving skills. It is an efficient tool for educators, parents, or anyone seeking a guide to explore the world . The hands-on activities are searchable by name of the real-world site, by type of activity (sorted by STEM field and name of the activity) or by Florida Curriculum standards associated with the concepts or skills used in the hands-on activity. The activities are also sorted by whether they are useful while you are visiting the site (to guide you in your exploration) or if they are introductory activities (to prepare you before you visit) or extension activities (to further investigate after you visit and have explored the site).

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

Sci4 screens
66 Days4 screens

Verdict

The call

The clearest difference is in-app purchases: Sci at none against 66 Days's 2. Sci also leads on update cadence (every 2 days vs every 10 days) and iOS requirement (15.1 vs 17.0). 66 Days's advantage is ratings volume (260 vs 2). On price, rating, ads and device support 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. Sci asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sci holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 66 Days has 260 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Sci ships an update every 2 days, 66 Days every 10 days. The most recent releases landed on October 30, 2026 and November 8, 2026 respectively.

Scorecard5 real differences · 5 level
Sci versus 66 Days: the parameters behind the verdict, then further details
ParameterSci66 Days
PriceFreeFree
Rating5.0 (2 ratings) — better4.8 (260 ratings)
Positive reviews—50.0% of reviews
Number of ratings2260 — better
Update frequencyEvery 2 days — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size33 MB110 MB
Age rating4+4+
DeveloperHands On Gainesville IncUru Technologies, LLC

Customer experience

Sci

All ratings1 ratings
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

None

Sci

No in-app purchases

2 purchases

66 Days

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

Questions

Is Sci free?
Sci is free to download, with no in-app purchases.
Is 66 Days free?
66 Days is free to download, with in-app purchases available.
Which has better reviews, Sci or 66 Days?
Sci is rated higher. Sci averages 5.0 out of 5 from 2 ratings, while 66 Days averages 4.8 from 260 ratings.
Do Sci or 66 Days have ads?
Neither Sci nor 66 Days shows ads.
Which is updated more often, Sci or 66 Days?
Sci ships an update every 2 days, and 66 Days every 10 days. Most recently, Sci was updated on October 30, 2026 and 66 Days on November 8, 2026.

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