Coffee TDS Refractometer

This device supports useful functons focuses user conveniences on base of user friendly NFC interface between mobile phone
Major function is
1. TDS measurement of coffee(drip, espresso)
2. useful calcurator
3. Location on brewing chart
4. Guidance to make user desired taste location
5. Sending out receipe and recording of measurement
6. Searching recent records
7. Selection measurng units