Comparison

3D Brain vs Psychology Dictionary

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

Head to head
About

3D Brain

Explore a 3D model of the human brain, rotating and zooming to examine 29 interactive structures. Learn about the function of each region, the effects of injury, and its role in mental illness. Detailed information includes case studies and research links.

Highlights
  • 3D brain model
  • Interactive structures
  • Region functions
  • Brain injury effects
  • Mental illness involvement
  • Case studies
  • Research links
Features
Read full description

Use your touch screen to rotate and zoom around 29 interactive structures. Discover how each brain region functions, what happens when it is injured, and how it is involved in mental illness. Each detailed structure comes with information on functions, disorders, brain damage, case studies, and links to modern research. Created by Vivid Apps and AXS Biomedical Animation Studio for the Cold Spring Harbor Laboratory DNA Learning Center. 3D Brain was produced for the Genes to Cognition (G2C) Online website funded by the Dana Foundation and Hewlett Foundation.

About

Psychology Dictionary

Explore over 18,000 psychological terms with in-depth explanations and a pronunciation guide. This app serves as a comprehensive resource for students, professionals, and anyone interested in mental health and self-improvement.

Highlights
  • Extensive database of 18,000+ terms
  • In-depth explanations
  • Bookmark and favorite terms
  • Pronunciation guide
  • Regularly updated content
Features
Read full description

Unlock the secrets of the human mind with Psychology Dictionary, your comprehensive guide to over 18,000 psychological terms. Delve into the fascinating world of mental health, therapy, and self-improvement, all at your fingertips. Expand your mental horizons and gain a deeper understanding of the human psyche. Download Psychology Dictionary today and embark on your journey towards self-discovery and mental wellness. KEY FEATURES EXTENSIVE DATABASE Access a vast collection of 18,000+ up-to-date psychological terms, from A to Z. Whether you're a student, professional, or simply curious, our app covers it all. IN-DEPTH EXPLANATIONS Dive deep into each term with detailed definitions and explanations. Gain insights into the complex concepts of psychology and mental health. BOOKMARK & FAVORITE Create your own personalized library by bookmarking your most-used terms for quick reference. Save your favorites to revisit later. PRONOUNCIATION GUIDE Improve your vocabulary with our pronunciation guide. Speak confidently about psychological terms with accurate pronounciations. STAY UPDATED Our database is regularly updated to ensure you have the latest information in the ever-evolving field of psychology. WHY CHOOSE PSYCHOLOGY DICTIONARY? Enhance Your Knowledge: Whether you're a psychology student or just curious about the mind, our app provides a wealth of information to satisfy your curiosity. Perfect for Professionals: Psychologists, therapists, counselors, and educators can rely on our app as a handy reference tool in their practice. Self-Improvement: Explore the world of self-help, self-discovery, and personal growth through a better understanding of psychological concepts. https://apa.nefarius.co/privacy-policy https://apa.nefarius.co/terms-of-use

Screenshots

3D Brain4 screens
Psychology Dictionary4 screens

Verdict

The call

The clearest difference is rating: Psychology Dictionary at 4.5 against 3D Brain's 3.6. Psychology Dictionary also leads on update cadence (every 4 weeks vs every 2 months) and review sentiment (86% vs 75%). 3D Brain's advantage is iOS requirement (6.0 vs 17.0). On price, ratings volume, 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. 3D Brain sells 1 one-off in-app purchase and Psychology Dictionary sells 8 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Psychology Dictionary holds the better App Store score, 4.5 against 3.6. Both are backed by a comparable volume of ratings — 146 and 420 respectively. Written reviews point the same way: 75% of 3D Brain's written reviews are positive against 86% of Psychology Dictionary's.

UpkeepUpdate frequency

3D Brain ships an update every 2 months, Psychology Dictionary every 4 weeks. The most recent releases landed on November 9, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
3D Brain versus Psychology Dictionary: the parameters behind the verdict, then further details
Parameter3D BrainPsychology Dictionary
PriceFreeFree
Rating3.6 (146 ratings)4.5 (420 ratings) — better
Positive reviews74.6% of reviews85.7% of reviews — better
Number of ratings146420 — better
Update frequencyEvery 2 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS6.0 — better17.0
Further details — not scored
Size70 MB54 MB
Age rating12+4+
DeveloperCold Spring Harbor LaboratoryNefarius Apps

Customer experience

3D Brain

All ratings145 ratings
Positive62.1%
Neutral11.7%
Negative26.2%
Written reviews260 reviews
Positive74.6%
Neutral5.8%
Negative19.6%

Psychology Dictionary

All ratings417 ratings
Positive88.5%
Neutral3.4%
Negative8.2%
Written reviews28 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

User reviews

3D Brain

From 146 App Store ratings

What we love

  • 🧠 Informative brain visualizations
  • 👍 Helpful for psychology/neuroscience students
  • 🔍 Detailed information and case studies
  • 🤓 Excellent learning tool

Room to improve

  • 🐛 App crashes after updates
  • 🤯 Upgrade causes app to stop working
  • 📱 Compatibility issues with newer devices
  • 🔍 Limited brain structures covered

Psychology Dictionary

From 420 App Store ratings

What we love

  • 📚 Comprehensive psychology terms
  • 🤓 Useful for life and exams
  • 👍 User-friendly interface
  • 🌟 Great resource for students
  • 💡 Detailed definitions

Room to improve

  • 💸 Expensive subscription
  • 📺 Intrusive video ads
  • 🙄 Ads interrupt typing
  • ❌ Rate us function not working

Bugs and requests

3D Brain

Reported bugs

4 issues
  • App crashes on launch after upgrade
  • Purchased premium version not functioning
  • Laggy performance and blurry images
  • No way to exit app other than force closing

Requested features

4 requests
  • More brain structures and regions
  • Improved 3D navigation and controls
  • Ability to label and annotate the brain
  • Quizzes and interactive learning features

Psychology Dictionary

Reported bugs

4 issues
  • Typo in definition of 'abuse' (foormal)
  • App closes when looking up terms
  • Video ads pop out while typing
  • Rate us function doesn't work

Requested features

2 requests
  • Add small or key examples for each word
  • Add horizontal view support for iPad (now implemented)

In-app purchases

1 purchases

3D Brain

One-time1
  • 3D Brain HQ$0.99
8 purchases

Psychology Dictionary

Subscriptions8
  • Premium$4.997 Days
  • Premium3 Days trial$4.997 Days
  • Premium weekly with discount7 Days trial$9.997 Days
Show 5 more
  • Premium3 Days trial$9.991 Month
  • Premium$9.991 Month
  • Premium1 Month trial$14.991 Month
  • Premium$34.991 Year
  • Premium6 Months trial$74.991 Year

Questions

Is 3D Brain free?
3D Brain is free to download, with in-app purchases available.
Is Psychology Dictionary free?
Psychology Dictionary is free to download, with in-app purchases available.
Which has better reviews, 3D Brain or Psychology Dictionary?
Psychology Dictionary is rated higher. 3D Brain averages 3.6 out of 5 from 146 ratings, while Psychology Dictionary averages 4.5 from 420 ratings.
Do 3D Brain or Psychology Dictionary have ads?
Neither 3D Brain nor Psychology Dictionary shows ads.
Which is updated more often, 3D Brain or Psychology Dictionary?
3D Brain ships an update every 2 months, and Psychology Dictionary every 4 weeks. Most recently, 3D Brain was updated on November 9, 2026 and Psychology Dictionary on November 3, 2026.

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