Gloss · Guides · The best vocabulary apps for adults in 2026

Compared

The best vocabulary apps for adults in 2026.

A vocabulary app works if it does three things the research agrees on: brings a word back before you forget it, makes you recall it rather than reread it, and shows it in context. WordUp is the best free place to start; Anki is the best tool if you will make your own cards; Gloss is the one to pick if you want words explained, not just listed. Here are ten, with what each costs and where each falls short.

By the Gloss team, PixelPaw · Published October 24, 2026 · How we check what we write

What a vocabulary app has to do

Three findings, each replicated many times, decide whether an app will work for you. First, spacing: in a meta-analysis of 839 assessments from 317 experiments, the ideal gap between the first and second study of a word grew as the time you needed to remember it grew; cramming is the worst schedule for anything you want to keep for a year (Cepeda, Pashler, Vul, Wixted and Rohrer, Psychological Bulletin, 2006). Second, retrieval: when students either reread a passage or were tested on it, rereading won five minutes later and testing won two days and a week later, with “substantially greater retention” (Roediger and Karpicke, Psychological Science, 2006). An app that shows you the definition again is not teaching; one that asks you for it is. Third, context: learners who met a new word ten times in sentences made sizeable gains, and the author noted that full knowledge “may require more than ten” encounters (Webb, Applied Linguistics, 2007). A list of words with definitions, however pretty, fails all three.

So the questions for each app are: does it schedule words to come back; does it ask you to recall them; does it show them in sentences; and what does it cost you, in money and in ads.

Vocabulary by Monkey Taps: the one most people have

With 221,000 ratings this is the market leader: a word of the day on a widget, categories, quizzes, and a huge word list. It is free with ads; the subscription runs $35.99 to $59.99 a year or $149.99 for life. Reviews praise the widget and complain about the ads and about features that moved behind the paywall. If you want the familiar daily word and do not mind ads, it is a fine default.

Word of the Day・Vocabulary (Vocabulous): a word, a flashcard, a game

38,000 ratings at 4.7. The same idea with flashcards and word games, free with ads, and a subscription that goes from $7.99 a week to $99.99 a year. Check the price you are agreeing to; the weekly plan is the expensive way to own it.

WordUp: the useful words first

WordUp’s idea is the best in the category: it ranks about 25,000 English words by how often they are used and teaches you the ones you do not know in that order, so every word you learn is one you will meet. Free to start, Pro $49 a year or $149.99 for life, 14,000 ratings at 4.8. The illustrations and some examples are generated, and reviewers notice. For a non-native speaker who wants the most useful 5,000 words, this is where we would start.

Magoosh Vocabulary Builder and Vocabulary.com: good, and getting old

Both are free and both were excellent. Magoosh’s quizzes cover GRE, SAT and TOEFL words; Vocabulary.com has the best example sentences anywhere and adaptive questions. Magoosh was last updated in January 2020 and Vocabulary.com in September 2021, and recent reviews of both wonder whether anyone is home. Free is a fair price for either; do not expect new features.

Knudge and Wordela: the smaller builders

Knudge (1,700 ratings) pairs flashcards with games and sells a lifetime for $19.99, which is the cheapest “own it” price here. Wordela (46 ratings) is newer and smaller. Both are honest, modest apps for exam words.

AnkiMobile: the tool, if you will do the work

Anki is the spaced-repetition program that medical students and language learners swear by, and AnkiMobile ($24.99, once) is its iPhone client. It does scheduling and retrieval better than anything else on this page, because that is all it does. The catch is that you make the cards, or trust a shared deck, and the interface is from another decade. If you are disciplined and already collect words, nothing beats it.

Quizlet and Elevate: vocabulary inside something bigger

Quizlet (a million ratings) has a ready-made set for every list that was ever assigned, including every SAT and GRE list, and its Learn mode schedules review. Elevate (512,000 ratings) is a brain-training app whose vocabulary games are good and whose point is broader. Both are worth having for other reasons; neither will teach you words you meet in the wild.

Gloss: explained, then kept

Gloss is ours. It starts from the other end: not a list to work through, but the words you actually meet, explained in the style you read (Plain, ADHD, Gen Z, Metaphor, Formal, or Like I’m 5), with the sentence, the origin and the synonyms. Then it does the three things above: one word a day chosen for your level, three questions to recall it, and four short games that bring it back on the day you would have lost it. No ads; paid after three free days; iPhone only; new, so few ratings yet. Pick it if you want to understand and keep words; pick WordUp if you want the most common words in order; pick Anki if you want to build the machine yourself.

How to choose, in three questions

1. Do you already have the words? If you collect them from reading, you want a dictionary that keeps and reviews them (Gloss, LookUp). If you need a list, you want WordUp, Magoosh or Quizlet.
2. Will you make cards? If yes, Anki. If no, anything else.
3. Can you stand ads? If not, the choice is Anki, Quizlet’s paid tier, WordUp Pro or Gloss.

Whatever you pick, the method matters more than the app: how to remember new words and why you forget them explain what to do with it.

Facts about other apps were read from their US App Store listings on October 24, 2026: prices in US dollars, ratings and counts as the store showed them. Prices and features change; if something here is out of date, write to us and we will fix it. Gloss is made by the people who wrote this page, so weigh what we say about it accordingly.

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Why you forget a word right after you look it up · SAT vocabulary: what the test actually asks, and 50 words worth knowing · The best word of the day apps for iPhone · Dictionary apps without ads, and what each one costs · All guides