Brew Science
Last updated: 2026-10-22
Brew Science is an offline-first coffee toolkit app. Our design principle: collect nothing we don't need, keep everything on your device that we can.
Brew Science is published by Nexbit Pty Ltd, Australia ("we", "us"). Questions about this policy or your data: hello@brewscience.win.
Brew Science sends none of your personal data to our servers. Everything you enter in the app — bean bags and archived bags, tasting cards, custom brew recipes, your signature, appearance settings — is stored on your device (via the OS's local database) and never seen by us. With iCloud Sync (Pro) enabled, this data syncs between your own devices, encrypted, through Apple's iCloud — again never touching our servers (see "iCloud Sync" below).
Uninstalling the app deletes the local data. If you used iCloud Sync, the cloud copy lives in your own iCloud account and can be removed in the system's iCloud storage settings. We have no server-side account system, so there is no account data for us to delete.
The only personal information we ever receive is an email you choose to send us (see "Feedback emails" below).
The Grind Size feature needs a photo (taken or picked from your library) to analyze grind coarseness on your device. That photo is processed entirely on your device, is never uploaded, is never saved anywhere outside the app, and is cleared from memory once you leave that screen.
The Grind Size diagnostic package (the working image used for analysis plus recognition parameters) enters the system share sheet only when you actively choose to export it; where it goes is up to you. If you never export, nothing is shared.
Bean-bag scanning and info-card scanning likewise use a photo (taken or picked from your library) to read the printed text and fill in the form, entirely on your device (system text recognition plus Apple's on-device model). The photo is never uploaded.
When you save a tasting card, the app asks only for "Add Photos" access: it can put that one card image into your library, and cannot see or read anything else there. When you pick a photo, the system photo picker hands the app only the photo you choose. Brew Science never asks to read your whole library.
Brew Science contacts our own server, api.brewscience.win, in exactly two situations:
1. Purchase verification: after buying or restoring Brew Science Pro, the app sends Apple's signed transaction ticket for cryptographic verification. The ticket is Apple's receipt — it contains no name, email or other personal data.
2. Premium data download (Pro only): the full grinder conversion library downloads once after verification, then lives on your device and works offline.
Our server code logs and stores nothing from these requests. Separately, when Apple notifies our server that a purchase was refunded or revoked, the server keeps that purchase's transaction number (an opaque number from Apple — no name, no Apple ID) so the refunded receipt can no longer unlock premium data. The server runs on Cloudflare, our hosting provider; like any network provider, Cloudflare processes your device's IP address to deliver the request and protect the service, under Cloudflare's own privacy policy.
With iCloud Sync enabled, data travels through Apple's iCloud service — a channel between you and Apple that never touches our servers. Everything else is zero-network: curated recipes, bottled-water data, all calculations and all of your records stay on your device.
Brew Science offers one auto-renewing yearly subscription, "Brew Science Pro":
iCloud Sync (Pro) stores your data in your own private iCloud database and syncs it automatically between your devices: encrypted, transferred and stored by Apple under your account. It never touches our servers and we have no way to read it. Signing out of iCloud, or disabling iCloud for this app in Settings, disables it completely.
Freshness reminders (Pro) use iOS local notifications: scheduling and delivery happen entirely on your device — no server involved, nothing uploaded. Turning off notification permission in Settings disables them completely.
If a scan looks wrong, or you use "Send feedback" in Settings, the app opens a pre-written email in your own mail app. Nothing is sent unless you send it yourself, and you can see everything — including any attached photo and scan diagnostics — before sending.
If you send it, we receive your email address, your message and any attachments. We use them only to reply to you and to improve recognition, and we keep them only as long as needed for that. We never sell them or share them with anyone, except our email service providers, which deliver the message.
No third-party analytics, advertising or behavioral tracking is integrated. We do not sell personal information.
You can ask us at any time to access, correct or delete any email you have sent us, by writing to hello@brewscience.win. Everything else the app stores is on your device or in your own iCloud account, under your control. If you are unhappy with how we handle your information, you may also contact your local privacy regulator (in Australia, the Office of the Australian Information Commissioner).
Brew Science is not directed at children under 13, and we do not knowingly collect personal information from them.
If how we handle data changes materially (for example, if we add accounts), we will update this policy here with a new "Last updated" date.
Nexbit Pty Ltd · hello@brewscience.win