Buying guide

Best Free Language Learning Apps (2026): The Honest List

The best genuinely free language learning apps, ranked after real use. Which ones are free forever, which are free trials wearing a disguise, and what free cannot buy.

By Michael McGettrick15 Aug 2026Updated 15 Aug 202636 min read

We earn a commission on some of the paid apps mentioned lower down if you subscribe through our links, at no extra cost to you. We earn nothing at all on our top two picks, which are free and open or donation-funded, and we have ranked them first anyway. Kilo Lingo is our own site, and is labelled as such wherever it appears.

The short version

The best genuinely free language learning tools are not the ones with the biggest advertising budgets.
Anki is free, open source and the most effective vocabulary tool ever built, and it earns us nothing.
Language Transfer is completely free, donation-funded, and the single best explanation of how a language works that you can get at any price.
Duolingo is free in the way that matters, and is genuinely good at the one job of getting a beginner to show up daily, but its grammar is thin and its streak mechanics are designed to hold you rather than to move you.
Beyond those three, most free tiers are trials in costume.
The honest summary is that free will take you further than people expect on vocabulary and grammar, and nowhere at all on speaking, because the thing you eventually have to pay for is a human being who will correct you.

Anki

Best free vocabulary tool, and the best full stopfrom Free (iOS app is a one-off purchase)

Open-source spaced repetition, and still the most effective vocabulary tool in existence. Ugly, unfashionable, and it will outperform every polished subscription app on retention per hour. Free on desktop, web and Android; the iOS app is a one-off paid purchase that funds the project. We earn nothing on it and it is still the first thing we would tell anyone to install.

Visit Anki

Language Transfer

Best free course, and the best explanation of grammar anywherefrom Free (donation-funded)

A free audio course that teaches by thinking aloud with a real student, building the grammar from what you already know as an English speaker. The Spanish course in particular does more for your understanding in nine hours than most apps manage in a year. No ads, no upsell, no account. Genuinely free, funded by donations.

Visit Language Transfer

Duolingo

Best for building the daily habitfrom Free, ad-supported

Good at exactly one thing, and that thing matters: getting a beginner to open the app every day. The full course is available free with ads. The catch is that the grammar is thin, the sentences are often useless in real life, and the streak is engineered to keep you rather than to graduate you. Use it as a habit engine, not as your only method.

Visit Duolingo

Babbel

Best paid upgrade when free runs outfrom ~£5-6/mo

The obvious first paid step once free tools stop explaining enough. Babbel treats you like an adult who can be told a rule rather than left to infer it, and on the annual plan it is cheap enough that the decision is easy. Not free, and not pretending to be.

Full Babbel review

Visit Babbel

italki

What free genuinely cannot dofrom ~£8/lesson

Not an app and not free, but it belongs on this list because it is the honest end of it. No free tool corrects your speaking. One hour a week with a real tutor does more for output than any amount of tapping, and it is the thing every free stack eventually runs into.

Full italki review

Visit italki

Best Free Language Learning Apps

Most "best free app" lists are ranked by which company runs an affiliate programme. This one is not, and the two tools at the top of it pay us nothing, which is the only reason worth trusting a list like this at all.

The short version: Anki for vocabulary, Language Transfer for grammar, Duolingo for the daily habit. Use all three for different jobs.

What "free" actually means in this category

Three different things wear the same word, and telling them apart saves a lot of wasted time.

Genuinely free. No cap, no conversion funnel, no advertising business. Anki is open source; Language Transfer is donation-funded. Nobody makes money when you use them more, which is also why neither has the compulsive retention design that the subscription apps have converged on.

Free because you are the product. Ad-supported, full-featured. Duolingo's free tier is the honest version of this: you get the whole course and you watch adverts. That is a fair trade and it is not a paywall in disguise.

Free as a trial in costume. The tier is capped precisely where the product starts becoming useful. Most app "free plans" are this. There is nothing wrong with it as a business model, but it is a sampling device rather than a product, and it should not be on a list like this.

The picks in more detail

Anki - the vocabulary engine

Anki implements spaced repetition properly: it shows you each card just before you would have forgotten it, which is the single highest-leverage thing you can do to vocabulary. It is unattractive, the interface is from another era, and the learning curve for building your own decks is real.

It is also better than everything else, and it will still be working in two years when the streak is long dead. Free on desktop, web and Android; the iOS app is a one-off purchase that funds the project.

Pair it with a frequency-ordered word list rather than random vocabulary - see why the first 1,000 words matter for why the order is most of the benefit.

Language Transfer - the grammar explanation

A free audio course built on a genuinely unusual method: the teacher works through the language with a real student, out loud, building each structure from something you already know as an English speaker. You are not memorising a rule, you are being walked to it.

The Spanish course is the standout and does more for your structural understanding in around nine hours than most subscription apps manage in a year. There are courses in several other languages including French, Italian, German, Greek, Arabic and Turkish. No account, no ads, no upsell.

Duolingo - the habit engine

Duolingo is very good at the thing everything else is bad at: getting a beginner to come back tomorrow. For a lot of people that is the binding constraint, and dismissing it is snobbery.

The criticisms are still fair. The grammar is thin, you are often left to infer rules that could simply be explained, and the sentence content is famously disconnected from anything you would say. The streak is engineered to retain you, not to graduate you. Use it as one component and not as a method. If you have outgrown it, we have a full list of Duolingo alternatives.

Where free stops

Free tools handle vocabulary, grammar and input extremely well. Reading and listening material is effectively unlimited once you have enough words to use it, which is the entire argument for comprehensible input.

What free does not supply is correction of your own output. Nothing free is listening to you speak and telling you what you got wrong. That is the ceiling, it is a real one, and it is where most people eventually spend money - a tutor on italki at a few pounds an hour does more for speaking than any stack of free apps.

If you want a paid app rather than a person, Babbel is the sensible first step up, and our comparison of the two covers the decision in detail.

A disclosure about this site

Kilo Lingo is ours, so treat this paragraph as an advert rather than a review.

The site is free to read: the whole curriculum, every word page, the grammar articles and the graded-reader stories, with no account required. An account adds saved progress, spaced review across devices and the printable worksheets, free for a week and then $5 a month. We have not put it in the ranked list above, because ranking your own product on your own "best of" page is how these pages became untrustworthy in the first place.

The honest summary

Free will take you considerably further than the subscription marketing implies, provided you pick tools by job rather than looking for one app that does everything. Anki for words, Language Transfer for how the language works, Duolingo if you need something to make you show up, and as much reading and listening as you can stand.

Then, when you have a few thousand words and can follow a podcast, pay for the one thing free cannot give you: someone who will correct you.

Author's Take

I have a low opinion of most free tiers and a very high opinion of two free tools, and the difference between them is worth explaining because it is the whole point of this list.

Most free tiers exist to convert you. They are shaped by the subscription they want you to buy: enough value to prove the product works, capped precisely where it starts becoming useful. That is a fair business model and I do not resent it, but it means "free" in most app marketing is a sampling device rather than a product.

Anki and Language Transfer are not that. Anki is open source and its incentive is nothing at all - nobody profits when you use it more, which is why it has none of the manipulative retention design that makes other apps feel compulsive. Language Transfer is one man explaining Spanish grammar properly and asking for a donation if you can spare one. Both are better than things I have paid for. Neither pays us a penny, which is exactly why I want them at the top of a page like this: a round-up that only ranks the brands with affiliate programmes is an advert wearing a review's clothes.

What I will not pretend is that free gets you all the way. It gets you vocabulary, which Anki does better than anything. It gets you grammar, which Language Transfer does better than most paid courses. It gets you a daily habit, which Duolingo does well enough. What it does not get you is someone who will hear you say something wrong and tell you. When I was rebuilding my French after Le Havre, the free stack rebuilt my vocabulary and my reading in a few months and did absolutely nothing for my speaking until I booked a tutor. That is the ceiling, and it is a real one.

The hill I will die on: install Anki before you install anything with a mascot. It is uglier, harder and less fun for the first week, and it will still be teaching you words in two years, when the streak is long dead.

Frequently asked

What is the best free language learning app?

For vocabulary, Anki, which is free and open source and remains the most effective spaced-repetition tool available at any price. For understanding how a language actually works, Language Transfer, a genuinely free donation-funded audio course. For building a daily habit as a complete beginner, Duolingo's free tier is good enough and gives you the full course with ads. Most people are best served by using all three for different jobs rather than looking for one app that does everything.

Is Duolingo actually free?

Yes, in the way that matters. The full course content is available on the free, ad-supported tier. The paid tier removes ads, adds unlimited hearts and some practice features, but it does not unlock lessons that free users cannot reach. The real criticism of Duolingo is not that it is a paywall in disguise, it is that the grammar explanation is thin and the streak mechanics are tuned to retain you rather than to move you toward fluency.

Can you actually become fluent using only free apps?

You can get a long way and you will not get all the way. Free tools handle vocabulary and grammar very well - Anki and Language Transfer are better than most paid products at exactly those jobs - and free reading and listening material is effectively unlimited once you have the vocabulary to use it. What free cannot supply is correction of your own output. Nobody free is listening to you speak and telling you what is wrong. That is the point at which most people pay for a tutor, and it is a small amount of money for a large effect.

Is Anki free on iPhone?

Anki is free on desktop, on the web and on Android. The iOS app is a one-off paid purchase, and that purchase is what funds development of the whole project. You can avoid it by using the free web version in a browser on iOS and syncing, though the native app is considerably nicer to use. It is the only paid element and it is a single payment rather than a subscription.

What is the catch with free language apps?

Usually one of three. The tier is capped just before the app becomes useful, so it is really a trial. Or it is free because you are the product, with the advertising load rising as you use it more. Or it is genuinely free but narrow, doing one job well and leaving the rest to you. The third kind is the good kind, and Anki and Language Transfer both fall into it. The trick is knowing which job each tool is for rather than expecting one free app to replace a method.

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