Mark first crack instantly
The live timer keeps a dedicated first crack action close by, including mobile controls for quick tapping during a roast.
Home roasting guide
First crack timer for home coffee roasting
First crack is the turning point where development time starts to matter most.
Track development time ratio
After first crack, the app calculates development percentage so you can judge whether the roast finished too fast or too long.
Compare first crack across batches
Saved roasts show first crack time alongside drop time and temperature, making repeatability easier.
Questions
Common questions
When should I mark first crack?
Mark it when consistent audible popping begins, not when you hear one isolated pop.
What is a good development time ratio?
Many roasters use roughly 15-25% as a starting range, but the right target depends on bean, roaster, and flavor goal.