Advanced Edition

One payment, and it stays yours.

This is the paid edition, and it adds nine tabs to everything the free one already does: Notes, 2D Plots, 3D Plots, Matrices, Stats, Distributions, WMW Test (the Wilcoxon-Mann-Whitney test), Images and Chem. There is no subscription, no renewal and no anniversary to budget for. If you are not sure you need it yet, please try the free Basic Edition first, which is a complete calculator and never expires.

What you are buying

$39 one time, perpetual

A perpetual license for one person, with nothing to renew
Both Advanced Edition jars, so it runs on Windows, macOS and Linux
The installation guide and the license agreement
Sent by email within 24 hours, usually much sooner, and by me personally

Keep a copy of the file. The download link I send you is temporary, so that the paid edition does not sit at an address that can be passed around. Once the software is on your machine, it never expires and never checks anything. Please save a second copy somewhere other than the computer you are reading this on.

If you lose it, write to me and I will send you a fresh link. Please do not hesitate to ask; sending a fresh link is part of the service.

Setting up the checkout, one moment.

Payment is handled by Paddle, who are the seller of record for this purchase and take care of sales tax and VAT wherever you are. The final amount, in your own currency, is confirmed on their checkout before you pay anything. Paddle takes the payment; the link for the software download comes from me. It shall be sent by email within 24 hours. I kindly request your patience.

A few things to know before you pay

What happens after I pay?

You will receive two emails, and they arrive at different speeds. Paddle's receipt is automatic and should reach you within minutes. The software comes from me, by hand, within 24 hours, and usually much sooner. I am one person, so please allow a few hours. A receipt arriving on its own is therefore normal; it is the faster of the two. If 24 hours have passed, please check your spam folder and then write to me. I would much rather hear from you twice than have you wait.

Can I get a refund?

Yes. If it is not what you expected, write to me within 30 days and I will refund it. You do not have to explain why. Paddle processes the refund, since they took the payment. I would rather return your money than have you feel stuck with something you cannot use.

Do I need an account?

No. There is no account to create, nothing to sign in to, and no license key to keep track of. Once the software is on your machine it never contacts anything, including me.

What does Paddle see about me?

Paddle sees whatever you type into their checkout, which is what any payment company needs to take a card and work out the tax: your name, your email and your billing country. This information goes to Paddle. I learn only who bought the software, so that I can send it to you. This page is the only page on this site that loads anything from another site, and it does so only when you open it. The privacy policy says the same in full.

I am buying for a school.

Then please do not use this page. A school gets a site license priced by enrollment. It covers everyone, including at home, and it is far better value than buying licenses one at a time. You can make yourself a quotation to attach to a requisition, and purchase orders are welcome.

Buying is subject to the license agreement supplied with the software.