The gold-standard spaced-repetition flashcard app with community decks for every language.
AppsTools Free BeginnerIntermediateAdvanced
vocabulary
Details
Free on desktop, Android and web; the iOS app is a one-off paid purchase that funds the project. The interface is dated and the options are overwhelming at first, but nothing beats it for retaining vocabulary over years. Most effective when you stop grinding premade decks and start mining sentences from things you actually read or watch.
Free full conjugation tables for any Portuguese verb, regular or irregular.
ToolsWebsites Free BeginnerIntermediateAdvanced
grammarwriting
Details
Type an infinitive and get every tense and mood laid out, including the personal infinitive and the future subjunctive that make Portuguese conjugation genuinely harder than Spanish. Free, fast and paired with dictionary, synonym and grammar sections from the same publisher. It is a Brazilian site, so where a form differs between varieties the Brazilian usage is what you see — check Priberam if you need the Portugal norm.
Open database of 13M example sentences with translations across 400+ languages.
WebsitesTools Free BeginnerIntermediateAdvanced
readingvocabularygrammar
Details
A collaborative, Creative Commons-licensed corpus you can search for real usage of a word or download in bulk to build your own decks. It is the raw material behind Clozemaster and countless Anki decks rather than a study tool in itself. Sentences are contributed by volunteers, so quality and naturalness vary — prefer sentences from native contributors and cross-check anything surprising.
Hear how a word is really said, searched across millions of YouTube clips.
ToolsWebsites Free IntermediateAdvanced
pronunciationlistening
Details
Type a word or phrase and it plays back real YouTube clips of people saying it in context, across 25 languages plus sign languages, so you get natural intonation and regional variation rather than an isolated dictionary recording. Free, donation-supported, no account needed. Complements Forvo: Forvo for single words, YouGlish for phrases and prosody.
Use an AI chatbot as a patient, free-ish conversation and grammar partner.
Tools Freemium BeginnerIntermediateAdvanced
speakingwritinggrammarvocabulary
Details
Modern assistants (ChatGPT, Claude, Gemini) will roleplay a scenario at your level, correct your writing with explanations, generate graded reading, and hold voice conversations — endlessly patient and available at 2am, which no tutor is. Free tiers are enough for text practice; voice modes generally need a subscription. The caveats are real: models are noticeably weaker and more error-prone in lower-resource languages, they tend to produce bland textbook register rather than how people actually speak, and they will not correct you unless you explicitly ask them to.
Fill-in-the-blank sentence drills for vocabulary after you know the basics.
AppsTools Freemium IntermediateAdvanced A2–C1
vocabularyreadinggrammar
Details
Built on Tatoeba sentences, it drills words in context by frequency band across 50+ languages and 170+ language pairings, with a genuinely generous free tier. It explicitly starts where beginner apps end, so it is the natural 'what now?' answer for someone who finished a Duolingo tree. Sentences are crowd-sourced and occasionally awkward or oddly specific, and it teaches nothing about grammar explicitly.
Crowd-sourced pronunciations of nearly any word by native speakers.
DictionariesTools Freemium BeginnerIntermediateAdvanced
pronunciationlistening
Details
Around 6 million words recorded by native speakers across 400+ languages, usually with several accents per word so you can hear regional variation. Free to search on the site; the paid tiers are aimed at API users and bulk audio downloads. Indispensable for names, place names and anything a TTS voice would mangle — many learners wire it directly into Anki for card audio.
Dual subtitles and click-to-look-up on Netflix and YouTube.
Tools Freemium IntermediateAdvanced
listeningreadingvocabularyimmersion
Details
A Chrome extension that shows target-language and native subtitles simultaneously, lets you click any word for a definition, replay a line, and save phrases for review. The free tier already covers dual subs, dictionary lookups and the CEFR-graded video catalogue; Pro (about $6/month) adds machine translation, speech recognition and better AI lookups. It transforms passive Netflix time into study time, but you need enough of a base — roughly B1 — for subtitle mining to beat just watching.
Read and listen to real content while tracking every word you know.
AppsTools Freemium BeginnerIntermediateAdvanced A2–C1
readinglisteningvocabularyimmersion
Details
Import podcasts, articles or ebooks, tap unknown words for definitions, and LingQ tracks your known-word count over time. The free tier caps how many saved words you can keep, so serious use means paying (~$13/month or less annually). The interface is clunky and the built-in SRS is weaker than Anki, but the reading-plus-audio workflow with 50+ languages is hard to replicate elsewhere.
Real European Portuguese audio and idioms, matched to your level, curated by one teacher.
WebsitesTools Freemium IntermediateAdvanced A2–C1
listeningvocabularygrammarimmersion
Details
Pedro built this for the specific problem of understanding Portuguese as it is actually spoken in Portugal — fast, swallowed vowels, idiomatic — with levelled listening practice, vocabulary saving and grammar articles. The free tier gives a weekly allowance of content and vocabulary review; Plus is about €11.60/month annually and adds unlimited access and AI speaking practice. Explicitly best from A2 upward; absolute beginners should start elsewhere.
Click any word while reading the web to translate it and make a flashcard.
ToolsWebsites Freemium IntermediateAdvanced
readingvocabulary
Details
A browser extension plus web reader covering 100+ languages: click a word or drag across a phrase, get an inline translation, and it becomes a flashcard automatically. The free tier gives unlimited single-word translations but caps phrases and AI explanations at 10 a day; Premium is $6/month. Simpler and cheaper than LingQ or Migaku if all you want is frictionless reading of articles and ebooks.
Record yourself and get free human feedback on your pronunciation.
AppsTools Freemium BeginnerIntermediate
speakingpronunciationlistening
Details
A 501(c)(3) nonprofit: you shadow native audio, record your own version, and a real human coach returns feedback — 10 free submissions a month, unlimited for about $20/month, with full scholarships for anyone who needs one. Covers French, Spanish, Chinese, Japanese, Korean, German, Italian, Portuguese, Russian and English. It only fixes pronunciation and delivery, so it complements rather than replaces conversation practice.
Turns Netflix, YouTube and web pages into Anki-style sentence cards.
ToolsApps Paid IntermediateAdvanced
immersionvocabularyreadinglistening
Details
The heavyweight immersion toolkit: one-click sentence mining with audio, screenshot and definitions, plus its own SRS and known-word tracking, for 11 languages including Japanese, Korean, Mandarin and the major European ones. A 10-day free trial then a subscription (roughly $10/month). Overkill unless you are committed to a sentence-mining routine — if that describes you it saves hours a week, otherwise Language Reactor's free tier is enough.