The best language learning app is the one that does the specific job you are currently failing at. Ranked lists collapse six different problems into one leaderboard, which is why the same three names top every article and why following those lists leaves people with four apps and one skill. What follows is organized by job to be done: pick the job, then pick the app.
Why ranked lists mislead#
A course app and a reading app are not competitors any more than a textbook and a novel are. They solve different bottlenecks. Someone at A1 who cannot form a sentence needs structure. Someone at B1 who understands the news but freezes in conversation needs a person to talk to. Handing both of them the same "number one app" guarantees one of them wastes a year.
Diagnose first. Ask which of these sentences is true right now: I do not know where to start; I do not know enough words; I cannot read anything real; I cannot understand speech; I cannot speak; I keep forgetting what I learned. Each maps to one section below.
Job 1: follow a structured course#
This is the right starting point at A0 to A2, when you need someone else to decide the order of grammar and vocabulary. Babbel and Busuu both build dialogue-driven, CEFR-aligned lessons, with Busuu adding corrections from native speakers in its community. Rosetta Stone teaches through images and target-language-only association, with no translation. Pimsleur is audio-first and built on spaced recall of spoken phrases, which suits commuters. Duolingo is the gamified default and is genuinely good at building a daily habit, though its ceiling arrives earlier than most users expect; Duolingo alternatives for adults covers what to move to. Language Transfer is free, audio-only, and explains structure unusually well for Romance languages.
Who it suits: absolute beginners, and returners who want their grammar re-scaffolded.
Job 2: drill vocabulary#
Volume matters. Nation (2006) estimated that 98% coverage of written text requires 8,000 to 9,000 word families, and no course app delivers that many. Memrise pairs word lists with short native-speaker video clips. Drops is fast, visual, and deliberately limited to short daily sessions. Quizlet is the general-purpose study-set tool with the largest shared library. Clozemaster is the outlier worth knowing: it drills words inside cloze sentences rather than in isolation, which is closer to how words are actually met.
Who it suits: anyone whose comprehension is bottlenecked on words rather than grammar, which after A2 is nearly everyone.
Job 3: get comprehensible input you can actually read#
Reading is the cheapest way to accumulate the volume Job 2 demands, provided the text is at the right level. Krashen (1982) called this comprehensible input, roughly one step above your current level. LingQ pairs a large community library with click-to-save reading and built-in review. Readlang turns any web page into a click-to-translate reader and builds flashcards from the words you look up. Beelinguapp presents side-by-side bilingual text with audio. Satori Reader is a strong, editorially curated option specifically for Japanese.
LingoBlend takes a different route into the same job: instead of finding text at your level, it adjusts text you already chose. You paste an article, a chapter, or a recipe, set a slider between 10% and 80%, and the AI replaces that share of the words with your target language, keeping grammar and conjugation correct. You read in a paginated reader, tap any blended word for its meaning and grammatical form, and saved words feed review games. It covers 17 languages in any direction; the languages page lists them. This is the diglot weave technique first described by Robbins Burling in 1968, and the broader argument for it is in comprehensible input explained.
Who it suits: A2 through C1 learners who can read something but not the thing they want to read.
Job 4: train your ear#
Listening lags reading for most self-taught learners because written input is easy to slow down and speech is not. Language Reactor turns Netflix and YouTube into a study surface with dual subtitles, hover translation, and saved phrases. Lingopie and Yabla take the same idea into their own curated video libraries. FluentU builds lessons around authentic clips. Outside apps, podcasts made for learners, such as slow-news formats and structured beginner series, remain the highest-value listening per minute, especially with transcripts.
Who it suits: anyone who reads at B1 but cannot follow a normal conversation, which is an extremely common asymmetry.
Job 5: practice speaking with a person#
This is the job software has not solved. AI conversation partners have improved sharply and are useful for lowering the anxiety of a first attempt, but they are endlessly patient in a way real interlocutors are not, and they rarely push back. italki and Preply connect you to paid tutors, including cheap conversation-only sessions. HelloTalk and Tandem match you with exchange partners for free, at the cost of more variable quality.
Who it suits: everyone above A2. Speaking is not a capstone skill you earn later; it is a separate skill that only improves by being done.
Job 6: keep what you learned#
Spaced repetition is not content; it is a schedule. Anki is the reference implementation, free on desktop and Android, endlessly configurable, and since October 2023 it can run the newer FSRS scheduler as well as classic SM-2. SuperMemo remains the original. RemNote and Mochi wrap similar scheduling in note-taking. Many language apps now embed a scheduler you never see, which is a reasonable trade; the comparison is laid out in Anki vs modern SRS apps.
Who it suits: anyone who has ever learned a word twice.
The jobs, mapped#
| Job | Symptom | Representative apps | Best for |
|---|---|---|---|
| Structured course | I do not know where to start | Babbel, Busuu, Rosetta Stone, Pimsleur, Duolingo, Language Transfer | A0 to A2, and returners |
| Vocabulary drilling | I do not know enough words | Anki, Memrise, Drops, Quizlet, Clozemaster | A2 upward, permanently |
| Reading and input | I cannot read anything real | LingQ, Readlang, Beelinguapp, Satori Reader, LingoBlend | A2 to C1 |
| Listening and video | I cannot follow speech | Language Reactor, Lingopie, Yabla, FluentU, learner podcasts | B1 upward |
| Speaking practice | I freeze in conversation | italki, Preply, HelloTalk, Tandem | A2 upward |
| Spaced repetition | I keep forgetting | Anki, SuperMemo, RemNote, Mochi | Everyone |
How to combine two or three without overloading#
The workable pattern is one input source, one review system, and one output activity. For example: a course app until you finish A2, then a reading tool as the main daily activity, a review queue for the words it produces, and a weekly tutor session. That is three tools with no overlap. The common failure is running three vocabulary apps at once, which triples the queue without adding a single new word source.
Time allocation matters more than app choice. Fifteen focused minutes daily beats two hours on Sunday, and the reason is the same spacing effect that powers every SRS. If you want a level-by-level view of what to prioritize when, CEFR levels explained maps the skills to each band. And if reading is your bottleneck, the features page shows how blending, capture, and review fit into one loop.