Name the goal
Pick your course site and end on a timer, or when your checklist is done.
Free forever. No account. Runs on your device.
Lock focus on what you're actually studying.
AutoFocus keeps you on your course until the timer ends or your goal is done. Searches that help your goal go straight through. The YouTube spiral, the feeds and the "just one more video" don't load.
Works in Chrome, Edge, Brave and Arc. The Mac app is optional.
ModeAF-S · Timer
GoalML · Week 3
Study siteedx.org
Time left49:59
Distractions held0
Data sent0 bytes
learning.edx.org / machine-learning / week-3 / regularization
AF
J(θ) = MSE + λ·Σ θj²
L2 shrinks weights toward 0
L2 shrinks weights toward 0
3.2 · Regularization: why L2 shrinks weights
Up next3.3 · Ridge vs Lasso
Study anywhere you learn
The spiral
One doubt. Ninety minutes gone.One doubt. Six minutes. Back.
It starts with a real question on YouTube. Then the sidebar takes over. Keep scrolling to watch the same morning twice.
0 min
away from the course
1
tabs open
Tuesday, without AutoFocus
- ▶Opened lecture 3.2 on edXRegularization, 14 min
- ?Searched YouTube: "why does L2 shrink weights"A real doubt
- ↗Clicked "I studied 12 hours a day for 30 days"From the sidebar
- ↻Autoplay. Then Shorts.Swipe, swipe, swipe
- ✉Checked Discord "for a second"14 messages
- …"Wait, what was I studying?"Lecture 3.2 still at 4:12
- ▶Started a 50-min session on edXGoal: ML Week 3
- ✓"why does L2 shrink weights" went straight throughOn-goal search
- ■Video ended. Recommendations hidden."Doubt cleared? Back to course"
- ↩Back on lecture 3.2One click
- ✕Discord stayed closedMac app, Strict mode
- ✓Quiz 3 done. Session complete.On course 94% of the time
Try it
Type what you'd search. See what happens.
This box runs the real AutoFocus relevance engine, right in this page. Nothing is sent anywhere.
Your goal
Goes straight through
Matches your goal, so the search opens normally.
01
Instant rules
Your study site always opens. Feeds and streaming sites are held. Docs, Q&A sites and references are always fine.
02
Offline keyword engine
Your goal becomes hundreds of topic terms. Searches and page titles are checked against them in microseconds.
03
On-device AI, only when unsure
Chrome's built-in model judges the unclear ones on your computer. No model? In Strict mode, you say how it helps.
How a session works
Set it once. Then just study.
Ask your doubts
Name the doubt and get a short, timed side quest. Related searches open; the timer brings you back.
Get caught drifting
Too long or too many pages away from the course, and AutoFocus checks in before the spiral starts.
Everything in the box
Built for the ways studying actually goes wrong.
Keep the video. Lose the rabbit hole.
During a session YouTube shows search and the player only. The home feed, recommendations, Shorts, comments and autoplay disappear. Each video is checked against your goal.
Tunnel mode
The AI runs on your laptop
Unclear pages are judged by Chrome's built-in Gemini Nano, offline.
0bytes sent
As strict as you need today
Off-goal pagesBlocked
Unclear page, no AIYou say how it helps
Ending earlyType a sentence + 30 s
Extension settingsOpen
Quitting takes a breath
To end early in Strict mode you type a sentence and wait out a countdown. The urge usually passes first.
A summary worth reading
50 minsession
91%on course
Plus every doubt you looked up. That's your revision list.
Park it, don't open it
That trailerafter
sana.k's reelafter
New mechanical keyboardafter
Five minutes, every 25
Everything opens on a break. When it ends, you're nudged back.
AutoFocus for Mac
Close the loopholes outside the browser.
An extension only sees Chrome. The free menu bar app covers the rest of your Mac while a session runs.
- Other browsers stay closedSafari, Firefox and Arc wait until the session ends.
- Distracting apps stay closedDiscord, WhatsApp, Steam, games and streaming apps. You choose the list.
- Switching the extension off doesn't workIf the extension goes quiet mid-session, Chrome is hidden until it's back.
- Time left in your menu barStart sessions and jump back to your lesson from there.
NOT NOW
Discord can wait
It'll be right where you left it when the session ends.
Finish Week 3 of edX ML42:10 left in this session
Back to course
Privacy
Nothing leaves your computer.
Your goals, searches and session history live in your browser. AutoFocus makes no network requests of its own, so there's nothing to leak and nothing to sell.
0accounts to create
0servers we run
0trackers or analytics
0searches sent to an AI cloud
0ads, ever
Pricing
$0
Every feature. Every student. Forever.
- Chrome extension with all three strictness levels
- On-device AI checks, side quests, breaks and summaries
- The Mac menu bar app
- No trial, no upgrade screen, no "Pro"
There's no server to pay for, because everything runs on your own device. That's what keeps it free.
Get started
Installed in two minutes.
Chrome extension
Chrome, Edge,Brave, Arc
- Download the extension and unzip it.
- Open
chrome://extensionsand turn on Developer mode. - Click Load unpacked and pick the unzipped folder.
- Pin AutoFocus, open your course and set a goal.
Mac app
macOS 13or later
- Download AutoFocus for Mac and unzip it.
- Drag AutoFocus.app into Applications.
- The first time, right-click → Open.
- Quit and reopen Chrome so it connects.
FAQ
Questions students ask first.
Does it block the whole internet?
No. Your course site is always open, references like Stack Overflow and docs are always fine, and searches that match your goal go straight through. Only clear distractions and off-goal pages are held.
What if I genuinely need YouTube?
Search and watch normally. Tunnel mode hides the feed, recommendations, Shorts and autoplay, and checks each video's title against your goal. When the video ends, you get one button: back to course.
Do I need the AI for it to work?
No. Most decisions come from the offline keyword engine. Chrome's on-device model only steps in for unclear cases. Without it, Strict mode asks you how a page helps, and saves your answer to your doubts list.
Is my browsing sent anywhere?
No. Everything is decided on your device and stored in your browser. There are no accounts, servers or analytics.
Can I end a session early?
Yes. Gentle mode asks once. Strict asks you to type a sentence and wait 30 seconds; Lockdown waits two minutes. It's meant to slow down the impulse, not trap you.
Windows, Safari, phones?
The extension works in Chromium browsers on any desktop. The companion app is Mac-only for now. Safari and phones aren't supported yet.
Your next session
Finish the course you started.
Free, private, and set up before your coffee cools.