Best Language Learning Apps Comparison: Reji vs Memrise vs Duolingo

Nowadays, the app market is flooded with options for language learners. There are flashcard apps, dictionaries, complete courses, grammar exercises, games, the list goes on… You’re sure to be spoilt for choice whatever it is you’re looking for. We shouldn’t complain, but sometimes it can feel a little overwhelming. So, how can you choose the best language learning app for you?

In this blog post, we take a look at the pros and cons of 3 popular language learning apps on the market: Reji, Memrise, and Duolingo.

At a Glance

Although Duolingo, Memrise & Reji are all language learning apps, they serve different purposes. Here’s what you need to know when it comes to choosing which one is right for you. Maybe after you’ve read this, you’ll realize 1 just isn’t enough!

  • Duolingo - best for grammar, less focus on vocabulary
  • Memrise - good for vocabulary, limited to built-in vocabulary (i.e. you can’t add your own)
  • Reji - best for learning vocabulary, you can save your own words from classes, books, Netflix shows (from anywhere, basically)
Duolingo Memrise Reji
Price Free Basic: Free

Pro: $59.99/year

Focus General/Grammar Vocabulary Vocabulary
Compatibility iOS & Android iOS & Android iOS
 Ease of Use  7/10  9/10 9/10


Download: On the App Store / On Google Play

Looking for a more comprehensive language learning app? Give Duolingo a go. Image Source: Google Images

Duolingo is more of a general course for language learners. If you choose Duolingo, you’ll learn grammar/syntax (how to structure sentences) and some vocabulary/expressions while you’re at it. It’s a good way to start from zero, but not the best if you already have some pre-existing knowledge of a language.

You may find Duolingo frustrating if you learn best from thorough explanations. Learning with this app is done mostly through trial and error and explanations are not offered for incorrect answers. If you are having trouble with basic sentence structures or need to drill a specific grammar point until you feel confident, Duolingo is the app for you.

Many of the sample sentences are irrelevant which can be frustrating if learning practical vocabulary and expressions is your aim. Learning how to correctly say, “A horse is eating a blue apple.” (This is a real example from the app!) may be relevant in terms of grammar but is clearly not so useful in real life situations.

Duolingo offers you some simple exercises, like composing sentences from a set of words. 


Download: On the App Store / On Google Play

If learning vocabulary is a priority, Memrise could be the app for you.  Image Source: Google Images.

Another popular choice, Memrise was named the overall Best App winner of the Google Play awards in 2017. Designed by a Grand Master of Memory and a neuroscientist specializing in the science of memory and forgetting, the focus of Memrise is very much so on learning new vocabulary.

For new learners, Memrise can’t compete with Duolingo when it comes to grammar. It doesn’t teach users how the language works which makes it difficult to really learn a language properly. However, if you already have a good base in your target language, Memrise is a great language learning app for quickly learning new vocabulary.

Memrise is limited to set vocabulary and courses which is a bit of shame but it’s still a solid choice for learning new vocabulary.


Memrise shows you different words (pre-defined in the app by levels) and speaks out to learn correct pronunciation.


Download: On the App Store

Creating personalized decks and memorizing new words is a piece of cake with Reji.
Creating personalized decks and memorizing new words is a piece of cake with Reji.

Reji focuses exclusively on vocabulary, so while it won’t help you learn a new language from scratch it is an excellent additional resource for language learners.

It allows you to save your own words very quickly and learn them using spaced repetition — a renowned method to efficiently learn hundreds of words in a matter of weeks.

You could definitely use it in conjunction with another language learning app or while your language studies. For instance, save words from a class, Netflix show, books, Internet, whatever.

You just type in words you want to remember, Reji translates them and pulls up examples sentences, definitions and images for you. Then you can learn saved words in a quiz game.


Reji lets you keep all your vocabulary in one place.


Reji’s learning mode is quite similar to the other language learning apps — you need to match words with the correct images, definitions or translations. It’ll remind you to remind incorrectly answered words one more time automatically — spaced repetition in action.

Download reji for free