Always within reach
Left, right, or automatic hand detection. The far half of the keyboard comes to you.
Available now for macOS
Keep one hand free. Keep every key.
Hamburger mirrors the keyboard beneath one hand, then quietly works out the word you meant. No new layout to memorize. No cloud watching what you type.
30-day fully featured trial. No card or account.
macOS 14+Left, right, or autoNo account
Qalso reachesP
Left hand demo
Physical keys
ttqe wetg wbe gabd
What appears
type with one hand
Those are the physical keys. Hamburger handles the rest.
The full product
A real keyboard app. Not a clever demo.
Choose a hand, see whether Hamburger is working, practice the mirror, and understand exactly what it has done. Then close the window and let it disappear into the menu bar.
Quietly gets personal
Hamburger learns your vocabulary and correction choices locally, with controls to review or reset them.
Practice with the real engine
Short drills build the reflex. Progress stays separate from everyday typing and never pollutes learning.
The mirror
Your fingers already know where every key lives.
Press the key under your hand that sits opposite the letter you want. Hamburger sees both possibilities and resolves the word from frequency, context, and what it has learned from you.
See the correction engineLeft-side pair map
- Q mirrors to P
- W mirrors to O
- E mirrors to I
- R mirrors to U
- T mirrors to Y
you press
ttqe→you gettype
Trust is a feature
It reads your keys. It never sends them anywhere.
The correction engine, your vocabulary, and your activity counters live on your Mac. Hamburger records counts, not the words you type. There is no account and no inference server.
100% on-device correction0 typed words stored in Activity
Read the plain-language privacy model →Any reason is enough
One hand is a way to type—not a diagnosis.
Temporary injuryA cast, a burn, post-surgery.
RSI or chronic painLess reach, less travel, less strain.
Limb differenceA permanent layout, not a workaround.
A hand that is busyBaby, coffee, phone, burger. No explanation needed.
The origin story
It started with a burger.
One hand held lunch. The other still needed the whole keyboard. The name stuck; the idea grew into a serious tool for anyone who wants—or needs—to type with one hand.
One hand. The whole keyboard.
Try every feature free for 30 days. Keep it for a one-time $19 introductory price.
30-day fully featured trial. No card or account.