Pricing
One price. Yours to keep.
Lambda PDF Basic has one price. You pay once, you own the licence, and there is no subscription. A capable PDF editor should be within reach for individuals, students, freelancers, and small teams anywhere.
The licence
What your licence includes
- Price
- $39.99 USD, once
- Licence
- Perpetual licence: pay once and keep using the version you buy. No subscription.
- Updates
- Keep using the version you buy for as long as you like. Updates within the same major version (for example, every 1.x release) are included; a later major version is a separate upgrade.
- Computers
- Activate on up to 2 computers with one licence.
- Offline use
- Activation is online, and the licence is then stored securely on your computer. Connect at least once every 14 days to keep editing features active; documents always remain viewable, printable, and savable.
- Platform
- Windows desktop, 64-bit
Launch price. Lambda PDF Basic is coming soon; purchasing is not open yet.
No subscription
Buy it once. Keep using it.
There is no monthly or yearly fee. The version you buy keeps working for as long as you use it, and your documents stay accessible whatever happens to your licence.
- Perpetual licence
- No subscription or renewal
- Updates within the version you buy
- Works offline after activation
- Everyday work stays on your computer
- Viewing, printing, and saving never need a licence
At launch
How buying will work
None of these steps is available yet. This is how purchasing is designed to work when it opens.
- 01
Create an Eigenexis account. Sign-in is planned to use passkeys, so there is no password to remember or leak.
- 02
Buy Lambda PDF Basic. Payment is handled by the payment processor; Eigenexis Systems never receives your card details.
- 03
Download the small signed installer and sign in. The installer verifies everything before it installs.
- 04
Lambda PDF Basic activates on your computer and keeps working offline.
Refund terms and sales-tax handling will be published here first. Until then nothing can be bought, reserved, or pre-ordered.
Questions
Questions about pricing
No. $39.99 USD buys a perpetual licence: you pay once and keep using the version you buy.
Keep using the version you buy for as long as you like. Updates within the same major version (for example, every 1.x release) are included; a later major version is a separate upgrade.
Up to 2 computers per licence. You can deactivate one to move the licence to another computer.
Not yet. Lambda PDF Basic is coming soon for Windows. The launch price is published so you can plan; purchasing opens at launch.
Refund terms and sales-tax handling will be published on this page before purchasing opens. Nothing can be bought until then.
Own the PDF editor you use every day.
A local-first PDF editor for Windows, sold once as a perpetual licence.
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