MarginPrint by Bennett Studio

Privacy & your data

Last updated 29 May 2026

The short version

MarginPrint runs entirely on your device. Your shop data — jobs, customers, prices, costs — never leaves it and is never sent to us. We run no server and keep no database of your business. We can't see your numbers, and there's no central pile of customer data for anyone to breach.

What we collect

From the app itself: nothing. MarginPrint is a local-first app. Everything you enter is stored in your own browser (via IndexedDB, with localStorage as a fallback) on the device you're using. It is not transmitted to Bennett Studio, and there is no account to create and no login.

Where your data lives

On your device, under your control. Because it's local:

The app works offline — useful next to a printer with bad Wi-Fi.
You can export a full JSON backup at any time from Settings, and import it on another device.
Clearing your browser's site data, or uninstalling the app, deletes your data. Keep a backup first.
Your data is tied to the device and browser you use it in. We don't sync it for you, so we never hold a copy.

Payments

Purchases are handled by Lemon Squeezy, which acts as the Merchant of Record. That means your card details go to Lemon Squeezy — never to us — and they handle payment processing, receipts, and sales tax/VAT. We receive only what we need to recognize your license (such as a license key and the email you bought with). Lemon Squeezy's handling of your payment information is covered by their privacy policy.

The optional AI feature

MarginPrint's pricing analysis uses Anthropic's Claude API and is bring-your-own-key: you supply your own Anthropic API key. That key is stored only on your device and is used to send requests directly from your browser to Anthropic — it never passes through us, and we never see it. It is deliberately excluded from your JSON backups so a backup file can't leak your key. When you run an analysis, the cost figures for that product are sent to Anthropic to generate advice, under Anthropic's privacy policy. If you never enter a key, the feature stays off and nothing is sent anywhere.

This website

The marketing site you're reading may use privacy-friendly, cookieless analytics to count visits (no personal profiles, no cross-site tracking, no advertising cookies). If you email us, we'll have whatever you put in that email. That's the extent of it.

What we never do

Sell or share your data — we don't have it to sell.
Run third-party advertising or tracking pixels in the app.
Require an account or hold your business data on our servers.

Your control

Because your data lives on your device, you control it directly: export it, move it, or delete it whenever you want, without asking us. If you have a question about any of this, or want help, get in touch.

Changes to this policy

If MarginPrint ever adds a feature that changes how data is handled — for example optional cloud sync — we'll update this page and note the date above before that feature ships. The local-first default isn't going away; anything that leaves your device will be opt-in.