Your notes, turned into a map you can actually see.
I built this because I got tired of staring at outlines. Drop in your PDF, textbook, or syllabus. Brain turns it into a 3D starfield of topics. As you learn, the stars change color from red to green.
Try it free See how it worksHow it works
Brain takes the documents you already have and turns them into a spatial map you can navigate, so structure stops living inside a wall of text.
Features
Everything runs in your browser. No install, no account database, no cloud copy of your material.
3D layout
See how everything connects. Rotate, zoom, wander around your knowledge. Distance and clusters mirror how topics relate.
Color-coded mastery
Red means "I don't know", green means "got it". It's a progress bar in space — weak areas are impossible to ignore.
Quizzes & blanks
Generate questions from your content and test yourself. No AI required — you can use any tool or just write them yourself.
Private by design
Your files are processed on your device and stored in your browser. No cloud, no account database, no tracking.
Works offline
Once loaded, Brain keeps working without a connection. Study on a plane, in a basement, in a hospital hallway.
Works with your files
PDF, DOCX, TXT and EPUB in. Scanned PDFs are OCR-read on your device (first 10 pages). Slides and spreadsheets extract too.
About
Brain is built and operated by try4ever — an independent, one-person software project based in Arizona, USA. I made it because I needed a better way to organize my own studies, and outlines kept hiding the structure I was trying to learn.
The product has one guiding rule: your study material belongs to you. Files are processed on your device, stored in your browser, and never uploaded anywhere. There is no account database holding your notes and no analytics following you around. The only data that ever leaves your device is an email you choose to send, and a payment handled by Stripe if you subscribe.
Questions, bugs, or access issues — write to support@try4ever.com. I answer within 5 business days, usually faster.
FAQ
No – works for anything: USMLE, MCAT, history, programming, whatever. Any material you can put in a PDF, DOCX, TXT or EPUB file.
Everything is stored in your browser. No cloud, no tracking. Your files are processed on your device and never uploaded. Clearing your browser storage deletes your data – it belongs to you.
There is a $0/month plan. It requires a short application – email support@try4ever.com with what you're studying – and approval. A paid plan ($19/month) skips the wait and activates instantly. Every new account also gets a 7-day free trial of the full product: no card required, and it does not auto-convert.
Paid periods are all sales final – that's why the 7-day trial exists and needs no card, so you can try everything before paying. Billing mistakes are the exception: if you were charged twice or in error, email support@try4ever.com. You can cancel in one click anytime and keep access until the end of the period you paid for. Full refund & cancellation policy →
try4ever – an independent solo software project in Arizona, USA. That means fast answers and no support-ticket maze: email support@try4ever.com and you reach the person who wrote the code.
Subscriptions are billed in USD through Stripe. Your card details go straight to Stripe's certified infrastructure – they are never seen or stored by Brain.
PDF, DOCX, TXT and EPUB. Scanned PDFs are OCR-processed on your device (first 10 pages). Images, slides and spreadsheets are extracted locally too.
Terms of Service
Effective September 20, 2026
These terms are the agreement between you and try4ever ("we", "us"), an independent software project based in Arizona, USA, for using Brain. They are deliberately short.
1. The service.
Brain is a browser-based study tool that converts your documents into a 3D knowledge map with quizzes and mastery tracking. Your files are processed on your device and stored in your browser; we do not receive copies.
2. Plans and billing.
There is a free plan available by application (email support@try4ever.com) and a paid plan at $19/month, billed in USD through Stripe. Every new account starts with a 7-day free trial that requires no card and does not auto-convert.
3. Cancellation.
You can cancel your subscription in one click at any time from the app (Settings → Manage Subscription), or by emailing support@try4ever.com. After cancelling you keep access until the end of the period you already paid for.
4. Refunds.
Paid periods are all sales final, except billing errors made by us (for example a duplicate or incorrect charge) – see the Refund & Cancellation Policy.
5. Acceptable use.
Use Brain for lawful study. Don't upload material you have no right to use, and don't try to break, scrape or reverse-engineer the service.
6. Your data.
Study content lives in your browser storage and is under your control. See the Privacy Policy for the short version of what does and doesn't leave your device.
7. Disclaimer.
Brain is provided "as is" without warranties of any kind. It is a study aid, not a guarantee of exam results.
8. Governing law.
These terms are governed by the laws of the State of Arizona, USA, without regard to conflict-of-law rules.
9. Changes.
Material changes will be published on this site with a new effective date. Continued use after that date means acceptance.
10. Contact.
support@try4ever.com – we respond within 5 business days.
Privacy Policy
Effective September 20, 2026
The short version: your study material never leaves your device. Brain was built so that there is nothing to leak.
What stays on your device.
Your uploaded files, your knowledge maps, your quizzes and your progress are processed and stored locally in your own browser (IndexedDB). We have no cloud copy, no account database and no access to them. Clearing your browser storage deletes them permanently.
What can leave your device, only by your action.
An email or DM you send us (we use it to answer you, then it's just conversation history). If you subscribe, your payment details go to Stripe – we never see or store card numbers.
What we don't do.
No analytics, no ad networks, no trackers, no cookies set by us, no selling data – there is no data to sell. This landing page is fully self-contained: styles, scripts and icons are embedded in it, and it makes no external requests. The study app additionally loads its document-processing libraries from public CDNs when you use it; those CDNs see standard request data (IP, user agent) but never your files.
Your control.
Delete your data any time by clearing browser storage for this site, or remove a single map inside the app. Questions or deletion requests: support@try4ever.com, answered within 5 business days.
Changes.
Material changes will be published on this page with a new effective date.
Refund & Cancellation Policy
Effective September 20, 2026
The summary: you can always cancel in one click, and you keep access until the end of the period you already paid for. Every account starts with a 7-day free trial that needs no card and does not auto-convert, so you can try the full product before any payment – which is why paid charges are final.
Refund policy – all sales final.
Once a paid period starts, payments are non-refundable, including for partial use, unused time, or forgotten cancellations. There are exactly two exceptions, both billing errors on our side: (1) you were charged twice for the same period; (2) you were charged an amount you did not select. Email support@try4ever.com with the Stripe receipt and we will correct it.
How to cancel.
In the app: Settings → Manage Subscription → Cancel Subscription. That's one click, anytime, no retention maze. You can also cancel by email to support@try4ever.com. Cancelling stops future charges immediately; your access continues until the end of the current paid period.
Before you pay.
The 7-day free trial requires no card and does not auto-convert into a charge. If you have not entered card details with Stripe, nothing can be billed to you.
Questions.
support@try4ever.com – we respond within 5 business days.
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