# Coffee Roast Timer > Track home coffee roasts, first crack, and roast profiles. Coffee Roast Timer is a free web app for home coffee roasters. It times each roast, logs events such as first crack and second crack as they happen, calculates the development ratio, and saves every batch as a roast profile you can compare, repeat, and share. Roasters can also browse profiles from people using the same machine. The app is client-rendered; the pages below are the canonical sources. All core features are free. ## Features - **Roast timer with event logging**: Start a timer and mark first crack, second crack, temperature readings and setting changes as they happen. Bean origin, green and roasted weights, and notes save with the roast. - **Development ratio and weight loss**: The app calculates development time after first crack, development ratio, and weight loss so you can see how far each batch was taken. - **Roast profiles you can repeat**: Every saved roast becomes a profile with a timeline. Compare roasts side by side and replay a profile to reproduce your best batch. - **Community profiles by roaster**: Browse first-crack and drop times shared by other home roasters, filtered by roaster model and coffee origin. - **Cupping notes**: Record tasting and cupping notes against each roast to connect roast decisions to flavor in the cup. ## Main pages - [Start a roast](https://roast-timer.com/roast): Open the roast timer and log a new batch. - [Discover roast profiles](https://roast-timer.com/discover): Search community roast profiles by roaster and coffee origin. - [All roasting guides](https://roast-timer.com/how-to): Every how-to and roaster-specific guide. - [About](https://roast-timer.com/about): Why Coffee Roast Timer was built and who maintains it. ## Supported roasters - [Gene Cafe CBR-101](https://roast-timer.com/how-to/roasters/gene-cafe-cbr-101): Drum roaster with dual temperature tracking and a transparent drum. - [Behmor 2000AB Plus](https://roast-timer.com/how-to/roasters/behmor-2000ab): Drum roaster with pre-programmed profiles, time extensions and large batches. - [FreshRoast SR800](https://roast-timer.com/how-to/roasters/freshroast-sr800): Fluid-bed air roaster with manual heat and fan control. - [KALDI Wide](https://roast-timer.com/how-to/roasters/kaldi-wide): Gas-fired drum roaster with manual flame control; supports hands-free voice input. - [Hottop KN-8828B-2K+](https://roast-timer.com/how-to/roasters/hottop-kn-8828): Programmable drum roaster with rate-of-rise tracking and automatic modes. - [Air popcorn popper](https://roast-timer.com/how-to/roasters/popcorn-popper): Low-cost entry point to roasting, with batch-size limits and visual cue tracking. ## Guides - [Getting started](https://roast-timer.com/how-to/getting-started): Set up the app, choose your roaster, and track your first roast. - [Using roast profiles](https://roast-timer.com/how-to/using-profiles): Read timelines, temperature curves and sensory checkpoints to replicate a roast. - [First crack timing](https://roast-timer.com/how-to/first-crack-timing): Diagnose early or late first crack and adjust the next roast. - [Development ratios](https://roast-timer.com/how-to/development-ratios): What development ratio is, how to calculate it, and how it affects flavor. - [Roast defects and fixes](https://roast-timer.com/how-to/roast-defects): Identify baked, underdeveloped, scorched and tipped roasts and how to fix them. - [Cupping notes](https://roast-timer.com/how-to/cupping-notes): Document taste evaluations and link them to roast decisions. - [Behmor 2000AB Plus troubleshooting](https://roast-timer.com/how-to/behmor-2000ab-troubleshooting): Fix late first crack, stalled roasts and uneven development on a Behmor. - [Popcorn popper safety](https://roast-timer.com/how-to/popcorn-popper-safety): Safer batch sizes, ventilation, and a starter profile for air poppers. ## FAQ ### What is Coffee Roast Timer? Coffee Roast Timer is a free web app for home coffee roasting. It times your roast, lets you mark first crack, second crack and temperature readings as they happen, and saves each batch as a roast profile you can review and repeat. ### Is Coffee Roast Timer free? Yes. All core features are free and no credit card is required. You can run the timer without an account; a free account is needed to save roasts and build your profile history. ### Which coffee roasters are supported? Coffee Roast Timer has dedicated setups for the Gene Cafe CBR-101, Behmor 2000AB Plus, FreshRoast SR800 and SR540, KALDI Wide, Hottop KN-8828B-2K+, and air popcorn poppers. Other roasters can be tracked with a custom configuration. ### What is a development ratio in coffee roasting? Development ratio is the share of total roast time that happens after first crack begins. For example, 4 minutes of development in a 15 minute roast is a 26.7% development ratio. Coffee Roast Timer calculates it automatically from the first crack and drop times you log. ### Do I need to install anything? No. Coffee Roast Timer runs in any modern web browser on a phone, tablet or computer, so you can keep it next to the roaster while you work. ### Can I see other people's roast profiles? Yes. The Discover page lists roast profiles shared by the community, filterable by roaster model and coffee origin, so you can see typical first crack and drop times on your machine. ## Optional - [Sitemap](https://roast-timer.com/sitemap.xml): Every public page, including community roast profiles.