According to the new FDA information Glucowatch will not be mass marketed.
The idea is simple. Its calibrated to a glucose prick and then the pacth that adheres t the underside of teh watch reads the amount of glucose in persppriation. This is then converted by an algorythm to a glucose reading.
However teh failure of it is based on teh soapd that use glucose based acids for washing. Purell style hand washing gels also contain a glucose substance.
Even if you use an alcohol prep swab the patchs failure is still non conclusive.

the watch is about 300 dollars. It is not covere dby insurance. and many users found them to be more obstructive as a watch and annoying as the patch dislodges and becomes bunched up.
The battery failure is high so each week a teh battery has to be changed.
It can also lead to false reading.

Sadly the idea has come and gone. Most kids think its cool ,, most like me had a chance to product test and do clinical work with it.. Its nto all ist cracked up to be.

The patch meter is similar and is being clinical studied in Sweden.