Roastmark

Roastmark is a coffee roast tracker built for home roasters who want more than a notebook or Excel sheet.

Log temperature, weight, and milestones in real time as you roast. Watch your bean temp and rate of rise on a live graph, mark first crack, and review your full roast curve when you're done.

FEATURES
- Real-time temperature + Rate of Rise graphs
- DIY Bluetooth probe support — build an ESP32 thermocouple that auto-logs bean and environment temp wirelessly (guide on the website)
- Roast profiles & templates — save past roasts as guides and overlay them on your live graph
- Compare up to 4 past roast curves side by side
- Batch cost tracking — log energy, labour, packaging, and custom costs per roast
- Excel export — full roast data including RoR at first crack
- Cloud sync via Firebase — access your roasts on any device, including the web app
- Works offline with local storage fallback
- Guest mode — no account needed to start logging

FREE TO USE
No subscription, no paywall. Roastmark is free on Android and on the web at roastmark.coffee.

BUILD YOUR OWN PROBE
Pair the app with a DIY ESP32-C6 + MAX6675 thermocouple for automatic temperature logging over Bluetooth. Full build guide at roastmark.coffee/probe-guide.html