You can download from the iOS App Store or Play Store. If you need a direct APK download, click the "App Download" link at the bottom of the page under "Services."

Yes! However it is worth noting that because espresso is made without a paper filter, the oils are not absorbed, resulting in residual oils being present in the espresso liquid, which can affect the accuracy of your reading.

To avoid this, it is recommended to filter your espresso by either purchasing syringe filters, or by placing a piece of circular filter paper into your portafilter during extraction.

If you choose to test espresso without filtering it, make sure to thoroughly clean the sample dish after testing to remove excess oil, preventing contamination on your next test.

We often receive questions about whether or not specific features or compatibilities will be available. We are a very community oriented company. We listen to our users complains and suggestions. If there's something you would like to suggest, please join our Discord where we can discuss it together!


R2 Extract is the result of all the knowledge and feedback gained from the coffee community from DiFluid Coffee.

DiFluid Coffee was our first generation refractometer originally designed as a multi-purpose general use refractometer. While being a huge leap forward from the previously available refractometer technology with its use of a large CMOS sensor, USB-C charging, and bluetooth app connection, there is no comparison to the level of accuracy, precision, and convenience of R2 Extract.

R2 Extract boasts a Microcalibration layer that acts like a mechanical compensater for external disturbances, a metal sample dish for quick and even heat distribution, two temperature sensors for precise, real time temperature compensation, a full color display for greater data density with a high refresh rate for bragging on social media, as well as huge advancements in the algorithm for a significant boost in testing speed.

R2 Extract was designed with the needs of the coffee community in mind, and its algorithm is upgradable via the companion app DiFluid Café.

All available countries and regions are listed here:

If your country/region is not listed, please contact us and we will try our best to find a solution

All items are shipping direct from our factory. This means that once the package leaves Shenzhen, it will be transferred to one of their partner shipping companies that corresponds to your country. Because of this, we are unable to know what shipping company will make the final delivery.

Not enough items available. Only [max] left.
Shopping cart

Your cart is empty.

Return To Shop

Add Order NoteEdit Order Note
Add A Coupon

Add A Coupon

Coupon code will work on checkout page


Select your currency