Simple pricing for serious modellers.

The browser-based web tools are free forever. The Excel add-in is free to try for 7 days with every feature unlocked; after that you need a licence (Yearly or Lifetime) to keep using it.

No. The add-in runs locally inside Excel and never uploads your model contents. The only thing it sends is a periodic licence check (your key and a one-way device identifier). The free web tools run entirely in your browser.

Your licence is active on one computer at a time. You can move it yourself from the Formula Audit ▸ Manage Licence panel: deactivate it on the old machine, then activate on the new one.

Yearly works out to $3/month, but it is billed as a single $36 charge once a year (not monthly), and renews automatically each year until you cancel. Manage your card or cancel anytime from the billing portal in your account at /account. Cancelling stops future charges; your card can only be removed after you cancel.

Lifetime is a one-time purchase of the add-in as it is today, yours to keep with no recurring billing. Lifetime owners receive updates and improvements while we ship them, but we do not guarantee updates for life or any specific future features. You are buying the add-in as-is.

After 7 days the add-in locks. Buying Yearly or Lifetime reinstates every feature immediately — no reinstall needed. You can purchase and manage everything from your account.

Lifetime includes a 30-day money-back guarantee, no questions asked. The Yearly plan can be cancelled at any time from your account — you keep access until the end of the period you have paid for.

Excel for Windows: 2016, 2019, 2021 and Microsoft 365. It installs as an .xlam add-in and needs macros enabled. It does not run on Excel for Mac or Excel on the web.

Yes. After activation the add-in works offline; it re-checks your licence periodically when a connection is available.

Applicable VAT is calculated and shown at checkout and on your invoice.