Lab
Stuck? Grabo explains.
Type or say your question, or send a photo, a PDF or a YouTube video. Grabo answers clearly, explains with an example, then offers to take it further.
Why does uₙ₊₁ − uₙ never change?
Because you always add the same number: the common difference r.
With 3, 5, 7, 9… you add 2 each time. So:
uₙ₊₁ − uₙ = r = 2
- Quiz me
- Flashcards
- Summarize
Ask Grabo…
Interactive example
Ask Grabo a question.
Pick a real student question: this is how Grabo answers it in the Lab.
Why does uₙ₊₁ − uₙ never change?
Example answers written in advance. In the app, Grabo answers your question, about your notes, at your level.
One question, a real explanation.
- 1
Ask the way you talk
Type, dictate your question or add a photo of your notes, a PDF or a YouTube link.
- 2
Grabo answers, then explains
First the answer in two or three sentences, then the explanation with a concrete example, and a lead to go further when the topic invites it.
- 3
Keep going
In one tap, he quizzes you, makes flashcards, a summary, a mind map or a study plan.
What the Lab changes for you.
At your level
You choose your level, from middle school to university: Grabo adapts his vocabulary, examples and the length of his answers.
Based on your notes
Add your notes as a photo or PDF: Grabo uses them to answer.
He keeps your tests in mind
Grabo sees the deadlines in your calendar and can offer to add a date he spots in the conversation.
In your language
He answers in the app's language, among 21 languages.
Frequently asked questions
Does Grabo give the answer straight away?
In the Lab, yes: you ask a question, he answers clearly, then explains. If you want to be guided step by step without seeing the answer, that's what Homework is for, in Coach mode.
What can I send him?
Text, your voice (dictation), a photo or image of your notes, a PDF or a YouTube link.
Can he make mistakes?
Yes, like any AI. Grabo runs on Gemini, Google's AI. If an answer looks odd, check it against your notes or ask your teacher.
How many messages a day?
20 a day on the free plan (10 per conversation), 60 a day with Pro.
Go further
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Graduo, in your pocket.
On iPhone, and on the web with the same account. Start on your laptop, finish on the bus.
Android: coming soon to Google Play