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The world of psychology, in one app

Understand the language of psychology — and actually remember it.

18,000+ psychology and psychotherapy terms, defined clearly in English and German. Look one up, save it to a list, and drill it until it is yours.

Download on the App StoreSee how it works

Free to start · iPhone, iPad, Mac and Apple Vision

18,000+
terms and definitions
4.6★
from 404 App Store ratings
2
languages — English and German
3
study modes on any list

What is Psychology World?

Psychology World is a psychology and psychotherapy dictionary from Nefarius Apps for iPhone, iPad, Mac and Apple Vision, defining over 18,000 terms in English and German.

Unlike a reference dictionary, it turns the terms you save into flashcard, multiple-choice and typing drills, so a term you look up once is a term you still have a week later. Browsing and bookmarking are free; a subscription unlocks the full study toolkit and removes ads.

Published by Nefarius Apps. Not affiliated with the American Psychological Association or the APA Dictionary of Psychology.

The problem

You looked it up once. A week later it was gone.

Cognitive dissonance. Operant conditioning. Secure attachment. You understood each one for about a minute — then the exam came, or the next chapter, and it had evaporated. The tools you reached for each solve half the problem.

Search gives you a definition

…and no reason to ever see the term again.

Flashcard apps give you a system

…but you have to build every deck yourself first.

Textbooks give you depth

…that does not fit into the four minutes you actually have.

How it works

How do you actually memorise psychology terms?

Four steps that turn a lookup into a memory. Psychology World is a dictionary with a retention loop built into it — the loop is the product, and everything else serves it.

  1. 01

    Discover

    Search 18,000+ terms or browse A⁠–⁠Z. Every entry gives you the meanings, plainly written.

  2. 02

    Save

    Bookmark it into a list of your own — “Exam 1”, “Cognitive biases”, “Chapter 4”.

  3. 03

    Study

    Turn any list into a game: flashcards, multiple choice, or typing the answer.

  4. 04

    Retain

    A word a day pulls you back. Repeat the list over a week and it stops being a lookup.

…and back to step one with the next term

Download on the App Store

What can you do in Psychology World?

Dictionary

A dictionary for psychology, not for everything.

Browse A⁠–⁠Z or search straight to a term. Every entry opens on its meanings in clean, readable blocks — tap one to copy it. A rotating suggested word gives you somewhere to start.

  • Browse A⁠–⁠Z
  • Full-text search
  • Tap to copy

Bookmark lists

Your terms, in your lists.

Make a list for an exam, a chapter, or a topic, and drop terms into it as you find them. No idea where to begin? Generate a random ten-word list and start there.

  • Named lists
  • Save from any term
  • Random ten

Study games

Three ways to drill the same list.

Flashcard — swipe through the list, tap to flip. Question — multiple choice, once a list has four or more words. Typing — write the answer out, which is the one that really tests you.

  • Flashcard
  • Question
  • Typing

Daily word

One word a day, so you come back.

A daily notification opens straight onto that day’s term. Thirty seconds, one term, and you are back inside the loop.

Inside the dictionary

Start with a term you half-remember.

A small sample of what is in there.

  • Cognitive dissonance
  • Attachment theory
  • Operant conditioning
  • Confirmation bias
  • Defence mechanism
  • Transference
  • Learned helplessness
  • Locus of control
  • Flow state
  • Cognitive load
  • Priming
  • Anhedonia
  • Object permanence
  • Reciprocal determinism
  • …and 17,986 more

The difference

Psychology World vs. web search vs. flashcard apps

Why not just search for it? Because looking a term up and owning it are different jobs, and most tools only do one of them.

Curated psychology content, ready to use

Psychology World
Yes
Web search
Uneven
Flashcard apps
No
Textbooks
Yes

Nothing to build before you can study

Psychology World
Yes
Web search
—
Flashcard apps
No
Textbooks
—

Built to make terms stick, not just explain them

Psychology World
Yes
Web search
No
Flashcard apps
Yes
Textbooks
No

Fits into four spare minutes

Psychology World
Yes
Web search
Yes
Flashcard apps
Yes
Textbooks
No

FAQ

Questions people actually ask.

English and German. Psychology World follows your device language on first launch, and you can switch at any time from Settings.

The content is already there. A flashcard app hands you an empty deck and expects you to fill it; Psychology World gives you the dictionary and the study games together, so saving a term and drilling it is the same motion.

Psychology World loads its dictionary from the network, so you need a connection to fetch content. Studying a list you have already opened is designed to stay quick and light.

Yes, to start. The dictionary and bookmarking are free, and a subscription unlocks the full learning toolkit and removes ads.

iPhone on iOS 17 or later, iPad on iPadOS 17 or later, Mac on macOS 14 or later with an Apple M1 chip or newer, and Apple Vision on visionOS 1.0 or later. One purchase covers all four.

Not today — Psychology World is an Apple-platform app. If an Android or web version ever happens, this page will be the first place it is announced.

Your next exam is one list away.

Look one term up tonight. Save it. In a week you will still have it.

Download on the App Store

Free to start · English and German · iPhone, iPad, Mac, Apple Vision