EdTech Discovery
Hermes

An instrument for spotting the next edtech opportunity — generated ideas, each traced to the real-world signals behind it.

Updated Jun 24, 2026 · 10 ideas · 1304 signals

Signals

The evidence library — the raw signals the pipeline is watching across the education ecosystem. Every idea is built from these.

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Reviews: Duolingo

[5/5] Great improvement

Duolingo has gone next level. Good Japanese tutor for someone practicing for years. Has helped me to advance with lots of common expressions. Much improved over the past.

App Store review · no public link
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Reviews: Duolingo

[1/5] Please make hard mode go away

I love Duolingo, but the hard mode character is such a disincentive. I want to quit every time he pops up. Nobody needs that.

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Reviews: Duolingo

[5/5] Amazingly great

You guys have the best app to learn languages I love this app it’s my favorite keep going guys ❤️🔥

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Reviews: Duolingo

[5/5] Es fácil de entender

Es muy práctico y explican. Muy bien

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Reviews: Duolingo

[5/5] Fantastic

Duolingo es de gran ayuda, no dispongo de mucho tiempo para ir a clases presenciales por el momento así que Duo se adapta an mis necesidades, sigo avanzando cada dia!

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Reviews: Duolingo

[5/5] Siempre con Duolingo

He aprendido mucho y me. Obligados hacer los ejercicios muy bueno mi amigo Duolingo

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Reviews: Duolingo

[5/5] Duolingo

Is the best thing you can do because if you really need help with Spanish or any language, you could just download super Duolingo and Duolingo is also free no ads and it really helps you learn and if you don’t know that much Spanish or English or any thing super Duolingo is always here and so is Duolingo and I could teach you test chest too so I hope you get Duolingo cause it’s the best game and learning device ever

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Reviews: Duolingo

[2/5] By Mia

It is so sweet and helps u learn new things that u need help with a cute bird

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Reviews: Duolingo

[5/5] Practical fun learning

The most practical way to learn or brush up on Spanish.

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Reviews: Duolingo

[1/5] Duoling is missing Thai :(

No Thai. So like this is bad. :(

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Reviews: Duolingo

[4/5] Duo

I am in the process of trying to learn Korean and it told me I had to create a profile before I moved on. Cool I did that then it deleted all my progress and I now have to restart all my progress. Not very happy with that. But overall a good app but it passed me off.

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Reviews: Duolingo

[5/5] Super

Duolingo is super nice and relaxing but it’s also very exiling in almost anything that I love!

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Reviews: Duolingo

[1/5] Sirve para una persona que no sepa nada del idioma

Es divertido pero es para personas que no sepan nada del idioma si quiere conversar no es lo mejor

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Reviews: Duolingo

[5/5] This app is great and i would totally recommend it

I love duolingo I would totally recommend it. I've been doing it since I was 5 or 6 and Ive been speaking French fluently for 3 years and I haven't taken a single French course other than duolingo.

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Reviews: Duolingo

[1/5] new energy thing sucks

i actually used to enjoy doing duolingo because i would rarely ever mess up, and its easy to gain hearts. now that they’ve removed hearts the app is practically unusable unless you pay. i would rather be forced to live without wifi than pay for their subscription. this is so money seeking.

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Reviews: Duolingo

[2/5] It was ok

This was ok but all the quests and leagues got in the way of learning and it became getting the most xp and moving up the leagues.

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Reviews: Duolingo

[5/5] Fantástico

Me ha ayudado mucho en mi aprendizaje, es lo máximo , quiero llegar hasta el final y poder hablar fluido inglés , gracias

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Reviews: Duolingo

[4/5] Gracias por esta app

Me ayuda mucho a ejercitar

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Reviews: Duolingo

[5/5] THE BEST

Omg it teach me real languages and now I can speak fluently

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Reviews: Duolingo

[5/5] Fun but

Fun but I wish you could get in more time to learn

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Reviews: Duolingo

[1/5] Has sadly grown some flaws over the years

Actively discourages learning at times with new energy system, limiting how much one can learn in a day and forcing you into micro transactions. Additionally, they have filled the app with, in my opinion, overly flashy junk animations that at times can take longer than even lessons(and truly, who wants to see a birds butt instead of actually learning?). Clearly the focus of the app has shifted from enabling learning to making money as 1 in 3 lessons are locked behind a subscription service, when this app was once free, accurate, detailed, and best of all fast, making it easy to learn throughout the day.

App Store review · no public link
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Reviews: Duolingo

[3/5] Too much

I have mixed feelings about this app because the teaching method is excellent, but the user experience can be incredibly exhausting. On the positive side, this app really works. After speaking almost exclusively in English for so many years, I wanted to relearn my native language. This app made that process incredibly fun and engaging. It successfully helped me bridge the gap, and I am already able to put individual words and phrases back into complete sentences again. For the actual learning content, I would easily give it five stars. However, the notification system completely ruined the experience for me. I recently got sick for a week and simply did not have the mood, energy, or brain capacity to focus on lessons. Instead of giving me space, the app went into overdrive. The non-stop push notifications on my phone and the endless stream of daily emails became way too much to handle. It felt less like a helpful reminder and more like constant harassment and guilt-tripping. Relearning

App Store review · no public link
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Reviews: Duolingo

[3/5] Charge

I appreciate the updates that the app has made over the past year to practice speaking more. Not a fan of having to have a certain charge to practice though. I could be doing really well in a lesson and not have enough charge to finish. Doesn’t make sense to me to lose charge when you are doing well and getting answers correct. Makes me lose momentum. I also don’t have money to pay for unlimited which is frustrating because it feels like that’s what it is directing you towards.

App Store review · no public link
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Reviews: Duolingo

[5/5] Duo lingo

Goated app

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Reviews: Duolingo

[1/5] A! and no humans

Wasnt the best when i got it years ago and now its the worst since yall using a! instead f actual people to help teach different languages and dialects.

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Reviews: Duolingo

[5/5] So helpful!!

Duo helped me so much, i love this app, I recommend!!

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Reviews: Duolingo

[5/5] Duolingo

This is the best learning app

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Reviews: Duolingo

[1/5] Liberal agenda

Why am I trying to help a girl find her new girlfriend? Why does a man have a husband?

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Reviews: Duolingo

[5/5] Dueling

Already learn my German like a champ ngl

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Reviews: Duolingo

[5/5] Does its job

My wife learned German for our Switzerland trip and could handle getting around and asking directions. I’ve since started learning French, German, Polish, and Hawaiian.

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Reviews: Duolingo

[5/5] Good

Better than doing nothing, it’s worth it

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Reviews: Duolingo

[5/5] Duolingo

I like it so much

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Reviews: Duolingo

[3/5] Super

I did the super trial for a week and it did not remind me so I got grounded for a MONTH

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Reviews: Duolingo

[5/5] Five stars!

This app has been helping me with four courses,I am reviewing some math, learning chess,and learning norwegian and Irish, and this app has helped me keep track with progress and has been an amazing experience!

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Reviews: Duolingo

[5/5] I learned a new language in 1 day

I thought Duolingo was just for fun and I thought I would only learn like one word but this has adopt me. I have learned so many new words from Duolingo. It’s crazy. It helps you learn words just for fun and duo is so cute. I’d really recommend this for little kids who really wanna learn another language and it can be used for adult adults too so yeah bye

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Reviews: Duolingo

[5/5] Best app ever

So awesome

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Reviews: Duolingo

[3/5] Oscar

i’m deleting Duolingo if they do not remove Oscar and make someone who’s less cocky or make him less cocky if they do five stars

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Reviews: Duolingo

[1/5] One thing that that they can remove and feels like punishing

Duolingo, but the energy button even if you were a perfect student and got every question right it still goes down for you forcing you to use super Duolingo and what if you don’t have super Duolingo, you’re just a sitting duck and if you don’t have super Duolingo, you can’t do another lesson. It feels punishing. Even if you neither it doesn’t matter if you get it right or wrong you get it feels punishing so maybe so Duolingo maybe you can like remove it because it kind of feels punish. But not to be rude. Never mind. No more. Oscar, sarcastic I do not recommend their scientific claims are fraud. And psychologist have debunked them. And your silencing the truth. And your app was once good until You Scientist RUINED IT YOU scientist ARE FOOLS!

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Reviews: Duolingo

[5/5] Thank you

You guys help me so much to learn Spanish gracias

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Reviews: Duolingo

[5/5] Duolingo

It is the best app and you should check it out if you want to move to a new country or city or you just t want to learn simple math or English or music it is the best learning app in the world 🤞🤞🤞😇😇🧸

App Store review · no public link
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Reviews: Duolingo

[1/5] Everything

I just finished 3 daily quests but it didn’t even give me a single prize or whatever its called. Are we serious right now? This isn’t learning new language its literally learning how to rage bate. Duolingo is not amazing, it kicks me out of the app and I have to restart the whole lesson and I don’t have like infinite life! OMG bro what is wrong with this app? It used to be better but now its just a random app that doesn’t work correctly and makes you rage bate. Even when I get the questions correct 5 in a row, 10 in a row, finish the WHOLE lesson. It didn’t even give me a single life? What is wrong? Like really I have to keep repeating. This is rage bating. I wish there was a better app. I want to stop using this app I feel like I’m stupid using this app. Also it wouldn’t even teach me real language. I searched it up in translate app and the sentence doesn’t make sense in Duolingo! Please give up REAL words not fake. Also I had 25 lives, and I got 10 correct in a ROW but it didn’t give

App Store review · no public link
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Reviews: Duolingo

[5/5] The best class you should join!

This app making me feel happy about this am learning Spanish and it’s helping me more now even this help if you make a mistake we go over it and try again and tells me what’s wrong what’s right this is a great app thank you!

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Reviews: Duolingo

[5/5] Bien

Muy bueno y me gustó para mi pronunciación

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Reviews: Duolingo

[5/5] Duolingo’s review

Duolingo helps me a lot but I’m just 11 and I don’t have money to pay for the no adds and I like playing it helps me learn faster than ever and I’m also very happy about the way I am learning so fast

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Reviews: Duolingo

[1/5] They’ll charge you fraudulently

When you sign up, you will be led to believe that the subscription is managed through the App Store, and then the subscription will not show up in your App Store subscriptions. They claimed to notify you before the charge hits your card, they actually claim they’ll let you know twice, they do not do that. DECEPTIVE!

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Reviews: Duolingo

[2/5] Don’t working

If you need an explanation of the rule, then for some reason it can't connect to the server to get this answer.

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Reviews: Duolingo

[3/5] Fun but what

Cool that I pay for yearly and still get constantly pestered in the app to spend more money. This is behavior I’d expect from a free app. We are all sick of this behavior, stop normalizing it, do better.

App Store review · no public link
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Reviews: Duolingo

[5/5] So far so good

I’m Hispanic and didn’t learn Spanish growing up, I may just have a chance. Really grateful for this app and really hoping this helps.

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Reviews: Duolingo

[1/5] Scam app

Do not use. Many in-app glitches that take your money and take your timer boosts for in-app game play. You can follow instructions, provide evidence, screen recordings, photos. No one responds but an auto reply. Even for “Max” paid subscriptions. Its all AI. No humans working here. Glitchs in AI voice recognition make it impossible to finish game play and effect competitive game play negatively. I liken it to Candy Crush in app scams. There are no refunds. Read Reddit. I recommend Babel for your language app. This is just a useless no longer fun game.

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Reviews: Duolingo

[4/5] Really good

It does really good to teach you things quickly for free or at least for a cheap price, but the only problem that I see is that it teaches you things but it doesn’t make you understand them

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