Leif is a small USB-C key for people who work from home, students, and anyone who wants to actually focus at their computer. Plug it in and the sites and apps you choose are blocked. Then put the key somewhere else. Nothing comes back until you plug it in again.
Software blockers live on the same screen as the things you're trying to avoid. Turning one off takes a second, and by the time you're tempted, you've already decided. Leif puts real distance between you and the off switch.
To end a session you have to get up and get the key from wherever you left it. That small walk is usually enough to change your mind.
Odysseus had his crew tie him to the mast so he couldn't steer toward the Sirens. Economists call it a commitment device: a choice made in a calm moment that's hard to undo in a weak one.
An app is easy to forget. A key on your keyring or across the room reminds you that you're in a session, and that you chose it.
A green case about as long as a paperclip, with a USB-C plug at one end and a hole for your keyring at the other.
Renders of the production design, made from the same files the cases are printed from. Photos of the first batch will replace them when it's built.
Your blocked sites stop loading in every browser and distracting apps quit. A small green dot in the menu bar shows a session is on.
Pull the key out and put it out of reach: a drawer, your bag, another room. The session keeps going while you work.
Everything comes back. Leif records how long you actually worked, counting only the time you were at your Mac.
Pick sites and apps between sessions. During a session the list is locked, so you can't trim it at 11 pm.
Leif runs in the background and restarts itself. A session ends when the key goes back in.
You get five emergency ends a month. Type a short phrase to confirm, and the session ends like a normal one.
Today, this week, your streak, and the hour of the day you focus best.
No account and no sign-in. Your sessions and block list never leave your computer.
Chrome tabs on a blocked site are sent to a quiet Focus page, then brought back when you finish.
One key, its case, and the Leif app. Free shipping in the US; other countries later.
The first batch ships by December 18, 2026. You'll get an email when yours is on its way.
Cancel any time before it ships for a full refund, or return it within 30 days. Returns and refunds
Not yet. Leif is Mac only for now.
All of them. Sites are blocked for the whole Mac at the network level, so Safari, Chrome, Firefox and Arc are covered. Chrome tabs that are already open also get sent to the Focus page.
End the session with one of your five emergency ends that month. A new key pairs with your Mac in one click.
Yes. Leif can't stop you from uninstalling it, and it isn't trying to. It adds enough friction that finishing the work becomes the easier choice.
The key only tells your Mac its name and serial number. It has no storage and can't see your files. The first time, your Mac may ask "Allow accessory to connect?". Click Allow.
No. Everything happens on your Mac.