Comparison

Psychology Dictionary vs Katalis

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

Head to head
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

About

Katalis

Features
Read full description

Katalis — Behavioural Health for Real-World Change Katalis is a behavioural health app designed to help you thrive—whether you are improving your personal wellbeing, strengthening your clinical skills, or fostering a healthier team culture. Grounded in evidence-based psychology, Katalis translates proven behavioural and psychological approaches into practical tools for everyday life. Learn at your own pace with self-guided coaching, participate in expert-led live sessions, and track your progress using digital wellbeing tools built for real-world use. Built for Real-World Change Katalis is flexible and scalable, supporting a wide range of individual, clinical, and organisational needs. For Individuals • Confidential tools for managing stress, sleep, burnout, and emotional wellbeing • Habit-building support designed for sustainable, long-term change For Clinicians • Practical, expert-led training to enhance clinical skills • Evidence-informed approaches that support better client outcomes For Teams & Organisations • Scalable wellbeing solutions to support performance and workplace culture • Tools for tracking engagement, progress, and measurable impact Privacy-First by Design Your wellbeing is personal. Katalis is built with privacy and confidentiality at its core, allowing you to learn, reflect, and track your progress with confidence and trust. Learn on Your Terms Whether you are starting small or working toward long-term transformation, Katalis helps you build the skills that matter—at your own pace, in your own way.Tools for tracking engagement, progress, and measurable impact Key Features • Evidence-based behavioural health programs (ACT-informed) • Self-paced coaching available anytime, anywhere • Expert-led live sessions and learning experiences • Digital wellbeing trackers to monitor progress over time • Expert-led clinical training for healthcare professionals • Scalable team and organisational solutions in a single ecosystem

Screenshots

Psychology Dictionary4 screens
Katalis4 screens

Verdict

The call

The clearest difference is iOS requirement: Katalis at 13.0 against Psychology Dictionary's 17.0. On price, update cadence, 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. Psychology Dictionary sells 8 in-app purchases, starting at $4.99 per 7 days and Katalis sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Psychology Dictionary ships an update every 4 weeks, Katalis monthly. The most recent releases landed on October 19, 2026 and September 28, 2026 respectively.

Scorecard1 real difference · 9 level
Psychology Dictionary versus Katalis: the parameters behind the verdict, then further details
ParameterPsychology DictionaryKatalis
PriceFreeFree
Rating4.6 (404 ratings) — better—
Positive reviews88.9% of reviews—
Number of ratings404 — better—
Update frequencyEvery 4 weeks — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size54 MB102 MB
Age rating4+4+
DeveloperNefarius AppsBehavioural Health Pty Ltd

Bugs and requests

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)

Katalis

Not enough reviews yet to summarise bugs or requests.

In-app purchases

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
9 purchases

Katalis

One-time9
  • Living with Pain2 variants$79.99
  • Sleep Reset$79.99
  • Depression: Practical Skills$79.99
Show 6 more
  • Anxiety: Practical Skills$79.99
  • ACT for Anxiety: ON DEMAND$100.00
  • ACT for Depression: ON DEMAND$100.00
  • ACT in Action: ON DEMAND$100.00
  • Focused ACT: Brief Interventions$129.00
  • Trauma Focused ACT$300.00

Questions

Is Psychology Dictionary free?
Psychology Dictionary is free to download, with in-app purchases available.
Is Katalis free?
Katalis is free to download, with in-app purchases available.
Do Psychology Dictionary or Katalis have ads?
Neither Psychology Dictionary nor Katalis shows ads.
Which is updated more often, Psychology Dictionary or Katalis?
Psychology Dictionary ships an update every 4 weeks, and Katalis monthly. Most recently, Psychology Dictionary was updated on October 19, 2026 and Katalis on September 28, 2026.

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