What you get
A perpetual license to the current major version, for you, on up to 3 Macs you use. Updates within that version are included.
Plain-language terms
The whole deal. Nothing buried in section nine.
These terms cover what you are buying, what Hamburger promises, and what it does not. The short version comes first, and the full text below says the same thing more carefully.
Last updated August 30, 2026
What it costs
$19 once during the introductory offer, then $29. No subscription and no recurring license check.
If you change your mind
30 days, no questions asked. Email support with your order number and the refund is processed.
What it does not promise
Hamburger rewrites text as you type and it will sometimes be wrong. Read what you write before you send it, and do not rely on it where a wrong word could cause harm.
The full text
Terms of sale and software license.
Who you are dealing with
Hamburger Keyboard is made and sold by Dennis Ju, a sole proprietor in California doing business as Dejuknow (“we”, “us”). Purchases are processed by our merchant of record, whose name appears on your receipt and whose own terms govern the payment transaction. You can reach us any time at [email protected].
By installing or using Hamburger Keyboard, you agree to these terms. If you do not agree, do not install it, and if you have already paid, ask for a refund.
Your license
When you buy Hamburger Keyboard you receive a personal, non-exclusive, non-transferable license to install and use the current major version on up to 3 Macs that you own or primarily use. The license is perpetual: it does not expire, and it does not stop working if you stop paying, because there is nothing recurring to pay.
You may use it for personal or commercial work. You may move a license between your own machines by deactivating one and activating another.
What the license does not cover
Please do not:
- Share, resell, sublicense, rent, or publish your license key.
- Redistribute the application, in whole or in part.
- Remove or alter copyright and license notices.
- Reverse engineer, decompile, or disassemble the application, except to the extent that applicable law expressly permits it despite this restriction.
The software is licensed to you, not sold. We keep all intellectual property rights in it.
The trial
The trial runs for 30 days from first use. It is fully featured, and it needs no card and no account. When it ends, correction stops until you enter a license key. Nothing you created during the trial is deleted or held hostage.
Updates and future versions
Updates within the major version you bought are included at no extra cost. A future major version may be a separate paid upgrade. If that happens, the version you already own keeps working for as long as your Mac can run it. We do not disable software you have paid for.
Refunds
You have 30 days from purchase to ask for a full refund, for any reason or none. Email [email protected] with your order number. We will not ask you to justify it. Your license is deactivated when the refund is issued.
This policy is in addition to any refund rights you have under the consumer law where you live. It does not replace them.
The goodwill license
If you need Hamburger Keyboard and cannot afford it, email and ask. You will receive a free license without explaining your health, income, or circumstances. A goodwill license carries these same terms.
Permissions on your Mac
Hamburger Keyboard needs Input Monitoring to hear the keys you press and Accessibility to write the resolved word back into the app you are using. It uses them for those jobs and nothing else. You grant these permissions in System Settings and can revoke them there at any time. Revoking them stops correction from working.
What the app does with your keystrokes is described in the privacy page, which forms part of these terms.
No warranty
Hamburger Keyboard is provided “as is” and “as available”, without warranty of any kind. To the fullest extent permitted by law, we disclaim all warranties, express or implied, including the implied warranties of merchantability, fitness for a particular purpose, title, and non-infringement.
We do not warrant that the app will be uninterrupted, error free, or compatible with every Mac, macOS version, or application. In particular, Hamburger Keyboard predicts and rewrites words as you type, and those predictions will sometimes be wrong. Reviewing what you have written before you rely on it or send it remains your responsibility.
Not for critical use
Do not use Hamburger Keyboard in any setting where an incorrect, missing, or altered word could cause injury, financial loss, or legal harm. That includes medical records and orders, emergency communications, aviation, industrial control, legal filings, and financial transactions. The app is a typing aid for everyday work, and it is not built, tested, or certified for safety critical use.
Limitation of liability
To the fullest extent permitted by law, we are not liable for any indirect, incidental, special, consequential, or exemplary damages, or for lost profits, lost revenue, or lost, corrupted, or altered text or data, arising out of or relating to Hamburger Keyboard, even if we have been advised that such damages are possible.
Our total liability for all claims relating to Hamburger Keyboard is limited to the amount you actually paid for your license in the twelve months before the claim arose.
Some jurisdictions do not allow the exclusion of implied warranties or the limitation of certain damages, so parts of the two sections above may not apply to you. Nothing in these terms limits liability for fraud, for personal injury caused by negligence, or for anything else that cannot be limited by law.
Ending the license
You can stop using Hamburger Keyboard and delete it at any time. Your license ends if you materially breach these terms, for example by publishing your license key or redistributing the app. If we ever end your license for a reason other than breach, we will refund what you paid.
Changes to these terms
We may update these terms for future purchases. The version in force for you is the one published on the day you bought your license, and the date at the top of this page tells you when this version was posted. We will not change the terms of a license you already hold in a way that takes away what you paid for.
Governing law
These terms are governed by the laws of the State of California, United States, without regard to its conflict of laws rules. If you are a consumer somewhere with mandatory local protections, those protections still apply to you and nothing here removes them.
Bundled language data
Hamburger Keyboard resolves words using n-gram frequency tables built from publicly available corpora. Those tables ship as derived statistics, not as redistributed source text. With thanks to Simple English Wikipedia (CC BY-SA 3.0), Tatoeba (CC BY 2.0 FR), and OpenSubtitles via OPUS (ODC-BY).
Everything else
If any part of these terms is held unenforceable, the rest stays in force. Not enforcing a term once does not waive it. These terms, together with the privacy page, are the whole agreement between us about Hamburger Keyboard.
Questions about any of this are welcome at [email protected]. If a clause here reads as unfair to you, say so. It is a short document written by one person, and it can be fixed.
Read the terms. Then try the keyboard.
Try the complete app for 30 days without a card or account.
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