Refracto is a user friendly tool for homebrewers that will help you to convert your refractometer measurements during a fermentation process from °Brix to SG or °Plato. It automatically compensates the alcohol effect during fermentation of your beer.

To use Refracto simply swipe to enter your original refractometer reading (from before fermentation) and the result of a current measurement. Refracto then immediately computes the following values:

- Original gravity
- Final gravity (apparent and actual)
- Attenuation (apparent and real)
- Alcohol by volume

At any time you can switch between four different modes of computation:

- Standard
- Kleier (a modernized version of the Standard formula)
- Linear formula according Sean Terrill
- Cubic formula according Sean Terrill

Please note:

- In addition to this App you will also need a Refractometer with a Brix-scale.
- The supported input range for refractometer readings is 0 to 32 °Bx.

What’s New

Version 1.4.2

Added support for the latest devices and iOS 12.

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

oliduss ,

Einfach genial!

Brauche das App regelmässig! Funktioniert tadellos! Danke dem Programmierer!


Michael Schmidt
1.5 MB

Requires iOS 11.4 or later. Compatible with iPhone, iPad and iPod touch.


English, German

Age Rating
You must be at least 17 years old to download this application.
Frequent/Intense Alcohol, Tobacco, or Drug Use or References
© Michael Schmidt
CHF 1.00


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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