Press kit

Search the App Store for “blood pressure” and the top results share a playbook: a free download, a short trial, then $4.99 per week— roughly $260 a year — with the user's own past readings locked behind the paywall. The audience is largely older adults tracking a chronic condition on doctor's orders; many don't notice the weekly billing until it has run for months. Some apps go further and claim to measure blood pressure with the phone's camera — a claim that has failed validation studies badly enough that researchers warned it could give false reassurance to people with dangerously high readings.

Cuff is built as the opposite, on purpose: a blood pressure diary where logging and full history are free forever, the single $4.99 unlock costs less than one week of the competition, and nothing — readings, notes, profiles — ever leaves the phone. It makes no measurement claims: you measure with your own validated cuff, Cuff keeps the log and turns it into a doctor-ready PDF report.

Cuff is a private blood pressure diary for iPhone from Argon Labs LLC. Logging is free forever, history is never locked, and CSV import/export and backup are free; one $4.99 purchase adds doctor-ready PDF reports, charts and trends, tags, reminders, multiple profiles, and Apple Health sync. There is no account, no ads, and no analytics, and readings never leave the phone; the only data sent is an anonymous crash report when something breaks. Cuff is a diary, not a medical device: it does not measure blood pressure or provide medical advice.

App icon and screenshots are available on request — email cuff@argonlabsllc.com and we'll send the full set within a day. Please don't recreate the icon or modify the screenshots.

The developer is available for interviews about subscription-pattern design in health apps, App Store pricing, and building fully offline software. Promo codes for Cuff Pro are available for reviewers.