The short version: we don’t collect anything. Nothing. From anyone.
Rein runs entirely on your Mac. It has no account system, no analytics, no telemetry, and no crash-reporting service. The only network requests it makes are the ones you initiate (casting media to a device on your network, or connecting your paired phone), an update check, and a one-time licence activation report. Once a day, Rein fetches a small version file from GitHub to see whether a newer release exists; that request carries no identifiers or personal data, and you can turn it off in Settings → Updates. The activation report is described under “Buying and activating a licence” below. Your settings live in your Mac’s local preferences. Media you cast is served directly from your Mac to your playback device and never touches our servers.
Payments are handled by Ko-fi, which passes us your email address when you buy. Our licence service, a small program we run on Cloudflare, uses it to create your licence code, and stores your email address, your code and the date so that you can collect your code again at any time.
When you unlock Rein with a code, Rein sends that code, an anonymous identifier for your Mac and the app version to the same service, once. The identifier is a one-way scramble of your Mac’s hardware ID: it cannot be turned back into the hardware ID, and it means nothing outside Rein. We use it only to see how many Macs each licence is used on. Your licence is always checked on your Mac itself, so it keeps working offline, and this report can never lock you out.
Rein Remote pairs with your Mac by scanning a QR code. The camera is used only for that scan; images are processed on-device and never stored or transmitted. The connection between phone and Mac is end-to-end encrypted; when it crosses the internet it passes through a relay that forwards encrypted packets it cannot read and does not store. Pairing keys are stored only on your devices. There are no accounts, no analytics and no advertising.
This website counts visits with GoatCounter, the same counter used across undercoverzest.app. It sets no cookies and stores no IP addresses or other personal data. It records, as totals, the page you visit, the site you came from, your browser and operating system, your screen width, your language and your country. To tell a repeat visit from a new one it keeps a scrambled code for up to eight hours, in memory only. The apps do not use it.
Only what buying and activating a licence needs: your email address, your licence code and the date of purchase, and for each Mac you unlock, its anonymous identifier, the app version and the dates it first and last reported. We never sell or share it, and we collect no usage data from either app. The website’s visit count is described above. To have your record deleted, email us; your licence code keeps working either way.
The apps collect no data from anyone, including children, beyond the licence details described above when a licence is bought and activated.
If this policy ever changes, the new version will be posted at this address with an updated date. Since the apps send us nothing, meaningful changes are unlikely.
Rein is made and sold by Luke David, trading as Undercover Zest, who is responsible for the data described here. Email tidbit-people.1u@icloud.com, or write to: Luke David, Suite 691, 80A Ruskin Ave, Welling DA16 3QQ, United Kingdom (a postal address for letters only).