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Rocket Languages vs Duolingo

A linguist's guide to how the language learning courses from Rocket Languages and Duolingo stack up

In the world of language learning apps, there may not be any two programs more different than Duolingo and Rocket Languages. Everything from the structure of their overarching course, to the style of their language lessons, to their pricing model, is in complete opposition. So when the two apps you’re considering are this vastly different, how do you know which one to go with? In this detailed comparison guide, we explain how these language apps diverge, and which we think is better.

  • Price
  • Money Back Guarantee
  • Lesson Length
  • Verbal Practice
  • Speech Recognition Software
  • Grammar Instruction
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    • $149+
    • 45-60 Minutes
    • Heavy Emphasis
    • Dedicated Lessons
  • Duolingo Free Trial Check Current Offers
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    • $84/yr (Paid Version)
    • 5-10 Minutes
    • Very Light
    • Light Explanations

Outline: Duolingo vs Rocket Languages

Given that this is a lengthy comparison, we’ve added jump-to links above so you can easily navigate to the section that most interests you.

Video Review: Rocket Languages or Duolingo?

In the above video, John from the TPI team breaks down how the language learning apps from Rocket Languages and Duolingo stack up. He discusses lesson effectiveness, program quality, and a lot more. For more detail, simply continue reading.

Rocket Languages Comparison

Rocket Languages

  • Free Trial Period
  • Money Back Guarantee
  • Free Trial Period
  • Money Back Guarantee
Our Score


  • star
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  • Audio-focused lessons greatly help to develop speaking skills
  • Extremely deep and robust program, especially compared to Duolingo
  • Interactive "reinforcement" exercises drive home material retention
  • Rocket uses superior voice recognition technology (Google Web Speech API)
  • Culutral insights within lessons add value to learning process
  • User experience not as modern and cool as Duolingo's
  • Not as many images and graphics as Duolingo (visual learners take note)
  • More expensive than Duolingo
Rocket Languages Comparison

What The Rocket Lessons Are Like

To help provide some context for our thoughts on the Rocket Languages program, let’s briefly discuss how the Rocket program works, especially in terms of the structure and format of the company’s lessons.

To begin, the Rocket program is essentially comprised of two different types of lessons, each of which take around an hour or so to complete from start to finish. This structure holds true for all Rocket courses, including Spanish, German, and French.

These two types include (1) interactive audio lessons and (2) language and culture lessons.

The interactive audio lessons are the primary lesson type, where a moderator speaking in English walks you through a conversation in your target language step-by-step. The moderator will start by explaining what the goal of the lesson is, why you’re learning it, and then set the stage for the upcoming conversation.

Then you jump into the actual conversation where you listen to fluent speakers converse. Every few sentences, the moderator will stop to explain what you just heard, provide pronunciation tips, and break down some quick grammar explanations.

In addition, perhaps more importantly, he or she will ask you questions and have you engage and participate in the conversation. Thus, you can essentially think of these interactive audio lessons as guided conversations.

rocket languages exercise
The Rocket Languages course is heavy on listening and speaking

Once done with the primary audio-based lessons, you move into the language & culture lessons, which are sort of like interactive textbooks.

You’ll read a paragraph explanation containing grammar rules or cultural insights, review a few examples to ensure you understand, and then jump right into another.

Then to finish out each lesson (audio and language), you review what you just learned through several short, quick-hit exercises meant to reinforce the material. These drills include flashcards, speaking exercises, writing drills, and quizzes.

Strengths Of The Rocket Languages Program

So now that you have an idea of how the Rocket Languages course works in terms of high level structure and lesson format, let’s get into the major pros and cons that I took away after testing this program.

Better For Conversational Skills

One of the clearest highlights I found with Rocket is that it is much better than Duolingo at developing your conversational skills.

Instead of just listening to or reading an individual word or phrase, and then mechanically repeating it in order to learn it (like you do with Duolingo most of the time), the Rocket Language audio lessons are much more powerful and effective.

The lessons prompt you to use the vocabulary and respond to a native speaker in the context of an actual conversation. This helps to keep you from becoming a passive listener.

You’re actively involved in tracking the conversation, and the moderator of the audio lessons keeps you on your toes since you need to understand what’s going on and respond at the necessary intervals.

rocket languages drill
The Rocket app really focuses on developing your conversational skills

In my opinion, this active participation is powerful at getting you to recall and use the language under pressure just as you would in real life situations. That’s likely the most important concept here – you’re getting simulated real world experience.

This creates a better environment for learning a new language as compared to just listening to words and repeating them in a vacuum like you do with Duolingo. This is a huge advantage for Rocket users in that regard.

Learn Wherever, Whenever

As roughly 50% of the Rocket lessons are audio-based, I like that you can complete these lessons while you’re exercising, washing dishes, driving, whatever. It’s just nice your face doesn’t have to be buried in your computer or phone at all times like it does with Duolingo.

Learning a new language can be a grind at times, and having the ability to take a break from the computer and pace around the house while you’re studying is awesome.

At least, that’s important to me as I have a hard time sitting still. In any event, I have to give credit to Rocket for how flexible their lessons are compared to Duolingo.

Grammar and Culture Emphasis

Another notable difference is that the Rocket Language courses really emphasize cultural insights and grammar instruction, while Duolingo does not. And the cool thing here is that Rocket actually accomplishes this in different ways.

The first way they do this is through the interactive audio lessons, where the moderator regularly stops to discuss different grammar principles and verbally explain the reasoning behind them. You generally don’t get these short grammar interludes with Duolingo.

Rocket Languages Quiz
A Rocket Languages quiz

Then of course, the majority of the grammar instruction is delivered through the company’s language and culture lessons, which sort of the take the form of an abbreviated digital textbook.

But don’t let the word “textbook” scare you there. Rocket does a great job breaking these lessons down into short, digestible chunks. Each section within the lesson is only about 4 or 5 sentences long, and within the lesson, there are dozens of break points where you interact with examples and pictures to keep you engaged.

So really, the language and culture lessons are more like a mix between a scaled-down digital textbook and an interactive assignment.

Overall, I was just really impressed with the level of grammar and cultural insights that the Rocket courses provide, as well as how the company integrates this material into their lessons.

Rocket Is More Accurate & Natural

Next, I found that Rocket is better with using natural sentences and phrases. With Duolingo, this actually seems to be a recurring issue among users.

In addition, I saw a lot of complaints of users online regarding incorrect translations with Duolingo as well, though I didn’t too much of this.

So it does seem like Duolingo has made strides to improve in this area as of late, but you still occasionally come across an awkward sentence or phrase that sort of stops you in your tracks, whether because it’s odd grammatically or just plain doesn’t make sense.

A couple examples of unnatural sentences or incorrect translations I saw within the forums were “it called my fat” and “the bed is food.”

rocket learn
The Rocket mock conversations are awesome

Honestly, it’s not a huge deal and it doesn’t happen all the time, but it can certainly disrupt and distract your learning process from time to time.

So overall, the key takeaway here is that Rocket seems to be more consistent and accurate when it comes to using natural sentences and correct translations within its lessons.

More Flexible Course Structure

Lastly, Rocket just offers more flexibility than Duolingo within the context of bouncing around in the curriculum. With Rocket, you can jump around from level to level, or lesson to lesson.

You’re not forced to follow a rigid progression, whereas with Duolingo, you have to follow their learning path. Maybe it’s not huge deal in the grand scheme of things, but it’s just another advantage for Rocket.



  • Free & Paid Subscriptions
  • 30+ Languages
  • Free & Paid Subscriptions
  • 30+ Languages
Our Score


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  • Lessons are game-like and fun, and only take a few minutes each to complete
  • Duolingo offers a totally free version (Rocket does not)
  • Wide variety of exercises and drills in lessons keeps things interesting
  • Regular review sessions to ensure the material is truly being internalized
  • Duolingo's program is less comprehensive than Rocket's
  • Grammar instruction is not a priority like with Rocket (focuses more on vocabulary)
  • The free version has serious limitations (annoying ads and daily caps on mistakes)
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What The Duolingo Lessons Are Like

Knowing what the Rocket Languages lessons are like, let’s get into our take on Duolingo, starting with an overview of their program.

With Duolingo, their lessons are shorter than Rocket’s. In fact, each one is only about 5 to 10 minutes long, and they go by super fast.

This is generally the case because each lesson is made up of a number of quick-hit, interactive exercises, including listening drills, fill-in-the-blanks, matching pairs, verbal practice, and writing full sentences.

And that’s about it. You work through a series of lessons one at a time, each of which is comprised of several short exercises that take around 5 to 10 minutes to finish in total. In a way, you can think of Duolingo’s lessons as similar to just the reinforcement drills of Rocket’s lessons.

duolingo review session
Duolingo offers a game-like experience

So from a high level, that’s how the two companies’ lessons compare. The Rocket lessons take around an hour or so to complete from start to finish, include more detailed grammar instruction, and place a very strong emphasis on listening and speaking in the context of simulated conversations.

Duolingo’s lessons on the other hand, are much shorter and include more variety in terms of drills and exercises.

Strengths Of The Duolingo Program

Now let’s get to the juicy part and cover the major pros and cons in favor of Duolingo, particularly in comparison to Rocket.

The Free Version

For people that aren’t looking to drop much money on their language learning (or any money at all), the fact that Duolingo offers a free version is awesome. I love that it’s completely free, and that their language programs are accessible to everyone.

However, the free version definitely has some drawbacks. For one, Duolingo’s free version is ad-supported, which can become really annoying. Secondly, the free plan comes with a limited amount of “hearts,” which are essentially just incorrect answers.

You start with 5 per day and if you answer a question incorrectly during a lesson, you lose a heart. In other words, they’re sort of like lives in a video game.

When your five hearts are up, you either need to stop for the day or circle back to old lessons in order to earn some hearts back. In my opinion, this can make for a discouraging experience.

Lastly, free users have a limited amount of “test outs.” Essentially, within the Duolingo program, if there’s skill or topic that you already know well and you’d like to skip ahead to keep learning new material, you can take a short quiz to “test out” of that particular topic and move on to the next lesson.

The issue here, however, is that free users only have a limited number of “test outs” available, so you can get stuck in their fixed learning pathway. Again, it’s just another annoying aspect of the free account.

Shorter Lessons

A major advantage for Duolingo is that their lessons are shorter. They go by super quick (just 5 to 10 minutes each), which is great for working professionals, students and busy parents. In this respect, their lessons are much like FluentU’s and Babbel’s.

I recognize that not everyone out there has a spare hour everyday day to dedicate to learning. Sometimes 20 to 30 minutes is all you have, so it’s nice that you can knock out 2 or 3 lessons with Duolingo in a short time frame and still feel like you’re being productive.

Related: Memrise vs Rosetta Stone Comparison

User Friendly Experience

As I alluded to above, Duolingo offers users a game-like experience. Their mobile and desktop apps are extremely user-friendly. Not only are they extremely quick, and responsive, but the dashboard and features are all intuitively organized.

duolingo verbal practice
Example of Duolingo practice drill

Plus, with all the visuals, cartoons, symbols, and other graphics that Duolingo includes, it just makes the language learning process more fun and exciting.

With that said, Rocket recently updated their user interface as well so this isn’t a huge win for Duolingo, but still, I thought I’d mention it in case user experience is extremely important to you.

Rocket Languages Comparison

Pricing Comparison

Before we get the final verdict, let’s quickly touch on pricing as that can be a significant factor for folks.

With Rocket, their courses range from around $150 to $450 for lifetime access, depending on how many levels you want to purchase. That may sound like a lot, but to be fair though, that $150 to $450 range is a little deceiving.

And that’s because Rocket Languages is almost always running some sort of deal or special promotion. I usually see those packages discounted by at least 10% to 40% off, if not more. So be sure to check for discounts before buying if you go with Rocket.

Rocket also offers 6-month payment plans as well for folks who are unable to pay the fee upfront.

Duolingo, on the other hand, takes a slightly different approach with their pricing model. As mentioned, they actually offer a free plan. Recall though that the free plan does come with some serious drawbacks as discussed above.

And for folks who don’t want to deal with the flaws of the free plan, Duolingo offers a Super Plan, which is a paid subscription. It costs $84 per year, or $7 per month.

So from an overall cost perspective, Duolingo is obviously the more affordable option. That said, it’s really hard to compare the two as it’s sort of an apples to oranges comparison.

On one hand, you have Duolingo which offers a free course that is a little bare bones, and on the other, you have Rocket which offers more premium language courses.

In any event, I should mention though that Rocket Languages does offer a free trial as well as a 60-day money back guarantee so you can always test the waters before fully committing.

Final Verdict: Duolingo Or Rocket Languages?

With the detail in this comparison out of the way, let’s get to the final verdict. Should you choose Rocket Languages or Duolingo?

Well, after using and reviewing each program, I actually don’t think it’s even close. Rocket Languages is clearly the winner. They just offer the more complete language courses from top to bottom. Duolingo simply can’t compete with Rocket’s interactive audio lessons or the level of grammar instruction they provide.

So I suppose the decision here really boils down to what you’re looking for. If you’re just looking for a free or cheap course to get the basics of a new language before you head off on vacation or do a little brushing up here and there, then I think Duolingo is a great option.

However, if you’re truly really serious about learning a second or third language, and you don’t mind paying to do so, then Rocket is the way to go. Their program is much more comprehensive and effective, and wins in my book.


Rocket Spanish vs Duolingo, which app is better for learning Spanish?

Without a doubt, after a thorough review of each program, our team believes Rocket Spanish is better than Duolingo for learning to speak Spanish. The Rocket lessons are deeper and provide much more verbal practice, helping to develop your speaking skills.

Thoughts on using Rocket Languages and Duolingo together?

Using Rocket Languages and Duolingo together isn’t a bad idea. I would suggest using Rocket Languages as your primary learning resource since it’s more robust, with Duolingo as a free supplemental tool to keep things fun and fill in the cracks.

Which is better - Rocket Italian or Duolingo?

Having used both programs, I can say without a doubt that Rocket Languages is better than Duolingo for learning Italian. The Rocket program is insanely more comprehensive and doesn’t have such a gimmicky feel like Duolingo.

What is the difference between Rocket Languages and Duolingo?

The primary differences between Rocket Languages and Duolingo are lesson length, format and depth. The Rocket lessons are more comprehensive, place a greater emphasis on grammar, and really do a good job of developing your speaking abilities, whereas the lessons from Duolingo are just much more basic in-nature.