The app contains a set of calculators to help you make calculations in home brewing. Following calculators are available: -calculation of the alcohol share from the initial and final density; -calculation of the alcohol share from the specific gravity; -density-to-specific gravity converter; -calculation of beer bitterness according to the IBU scale; -calculation of the alcohol share when measuring with a refractometer. The app also contains other calculators that are useful to home brewers. Feedback and suggestions for improving the app are welcome.