Licence terms

• A perpetual licence for one person. Pay once, use Prism Pro forever, on any machine you personally use. The licence does not expire and there is nothing recurring to cancel.
• A licence key, not an account. After purchase you receive a signed key by email. Your browser verifies it locally — activating the key never contacts a server, because there isn't one.
• The version that exists today. Updates we publish to the web app are included. We aim to keep improving Prism, but the purchase price buys the product as it stands, not a promise of specific future features.

Prism has no server, no accounts, and no analytics. Your spreadsheets are processed entirely in your browser and are never transmitted to us or anyone else — a claim you can verify yourself. Because we never have your data, there is nothing for us to store, sell, lose, or be compelled to disclose.

Prism doesn't inspect what's in your file — it's a general-purpose review tool for any spreadsheet, which means it has no way to refuse one containing regulated data (payment card numbers, health records, government IDs, and similar). Loading such a file into Prism carries the same responsibility as opening it in Excel on the same machine: nothing leaves your device either way, but you remain responsible for complying with whatever laws, standards, or policies apply to that data (including PCI DSS, health-privacy law, and your employer's or client's confidentiality obligations).

One practical difference worth knowing: Prism can save your workspace to your browser's local storage so you can resume later (see what Prism stores, and where). If you're working with something especially sensitive, use New file or delete the workspace from the upload screen when you're done, rather than leaving it saved.