For families who want their kids to use AI, not lean on it
An AI that won't do their homework.
They check instead of trust
Every answer carries a link to the page it came from. Kids get used to clicking it, reading the sentence, and deciding for themselves whether the answer was right. That habit transfers to every AI they'll ever use.
They work from your books
Delyr answers from the books you've added before it looks anywhere else, so the help matches what they're actually studying. Over time those books become a library of your own.
They learn how AI works
A short course inside Delyr explains what the AI is, why it sometimes gets things wrong, how to ask a question that gets a good answer, and what to do when the answer is bad. Eight lessons, written for a middle-schooler.
Write my paragraph about why the Roman Republic became an empire.
I won't write it for you. I can explain the two main reasons historians give, from the pages here, and you can write the paragraph from that.
The Republic's generals gained armies loyal to them rather than to the Senate, and a century of civil wars ended with one man, Augustus, holding power [1].
Sources
[1]Roman Republic Simple Wikipedia
Why it answers from your library, not the internet
You decide what it can say
Delyr can only answer from the books on your computer. There is no hidden training data, no web results, no content you didn't choose. If a book isn't in the library, its ideas aren't in the answers. What your kids get from it is exactly what you put in.
It uses what they're already learning from
The curriculum you bought, the readers on the shelf, the science text they're halfway through. Delyr answers from those first, in the same terms and the same order the book teaches them, so the help matches the lesson instead of contradicting it.
It works where the Wi-Fi doesn't
The whole thing lives on the laptop: the books, the AI, the quiz. It works the same in the car, at the cabin, on the flight, or at the kitchen table with the internet off. Nothing they type is sent anywhere, because there is nowhere for it to go.
Build your family's own library
Every book you drop into Delyr becomes part of a library that's yours: searchable, quizzable, and on your computer only.
Most families already own the material that matters: the curriculum they picked, the readers, the workbooks, the science text, last year's projects. Drop them into Delyr and it answers from those before anything else, so the help your kids get comes from the books you chose, in the words their teacher, or you, would use. Ask about chapter four and it answers from chapter four. Quiz them on it and the questions come from that chapter, with the sentence each answer came from.
It grows with them. Add the next year's books and the old ones stay. Add their own essays and reports and Delyr treats those as a record of what they wrote, useful for review, never mistaken for fact. The result, after a few years, is something no online service can give you: a private library of everything your family has studied, that one of your kids can search at the kitchen table with the Wi-Fi off.
Takes PDFs and EPUBs, including scanned ones. Nothing is uploaded anywhere; the books never leave the folder you put them in.
Why use the tool
Kids are already using AI for school. The question is whether they learn to work with it or lean on it. The numbers say leaning is winning.
of U.S. teens have used a chatbot for schoolwork; 1 in 10 do all or most of their schoolwork with one.
Delyr's answer: it helps with the thinking and refuses the finished work, so "use AI for school" can't quietly become "AI did school."
Pew Research Center, teens 13–17, Sept–Oct 2025
kids know that AI cannot reliably tell fact from fiction. Two in three don't.
Delyr's answer: every answer links to the page it came from, and when the library doesn't cover it, it says so. Checking becomes a habit instead of a lecture.
Common Sense Media, ages 9–17, 2026
kids say no parent or guardian has ever talked with them about using AI safely.
Delyr's answer: an eight-lesson course inside the tool, written for a middle-schooler, covers what the AI is, why it gets things wrong, and how to use it well. The conversation is built in.
Common Sense Media, 2026
brain connectivity of three groups, and the least able to quote their own essays: students who wrote with an AI assistant, in an MIT study that measured them over four months.
Delyr's answer: the student still writes every sentence. Delyr explains, points to sources and quizzes; it doesn't produce the work.
MIT Media Lab, "Your Brain on ChatGPT," 2025
A related Microsoft and Carnegie Mellon survey of 319 knowledge workers found the same pattern in adults: the more people trusted the AI, the less critical thinking they reported doing. Delyr is built so that trusting it is never required. You can always look.
Sources: Pew Research Center, "How Teens Use and View AI" · Common Sense Media, AI Use by Tweens and Teens 2026 · Kosmyna et al., MIT Media Lab, "Your Brain on ChatGPT" · Lee et al., Microsoft Research and Carnegie Mellon, CHI 2025
Buy it once. That's the last time.
No subscription, no renewal, no account that can be closed. The program and your library live on your computer and keep working for as long as the computer does. Windows 10/11 or a Mac with an M1 chip or newer, 8 GB of memory, 12 GB of free disk. The first download is about 6 GB; after that it works with the Wi-Fi off. If it doesn't run on your computer, you get your money back.
Questions parents ask
Will it help with homework at all, then?
Yes, the way a good tutor does. It explains the idea behind a problem, shows a worked example with different numbers, summarizes a chapter, or quizzes them on it. It won't produce the essay, the paragraph, or the answer to the worksheet question. A parent can switch that rule off in Settings.
How is this different from ChatGPT?
ChatGPT answers from what it remembers and can't show you where a fact came from. Delyr only answers from pages on your computer and links every answer to its page. It's a smaller AI, so answers are shorter and plainer, and it's honest when it doesn't know. Nothing your child types is sent anywhere.
What books does it come with?
A starting reference shelf: Simple English Wikipedia, Vikidia (an encyclopedia written for kids), and PhET science simulations, with Wikipedia and others available from inside the app. The library that matters is the one you build from your own books; Delyr also points you to publishers who give textbooks away free if you want more.
Is it really a one-time purchase?
Yes. You pay $59.99 once and the program is yours on that computer. There's no subscription, nothing expires, and it doesn't need us to keep working. If we release an improved version, you'll be able to download it from where you bought it; nothing is ever pushed to your computer.
Does it really work offline?
After the first download, yes, entirely. It connects to nothing on its own. The only time it uses the internet again is if you click Download on an extra library pack inside the app. You can turn off Wi-Fi and check.
What if something breaks?
There's a status page inside Delyr that checks itself and gives you a button for each fix. If it's still broken, email us and we'll fix the product.