in this stage i decided to use all system components i used in prototyping phase, the same enclosure (i designed a PCB that can fit into the enclosure) with OLED display, HC-05 bluetooth module and battery

CAD

now it's time to CAD the design using 3D max, all files available here

then 3D printing it

after that i designed the PCB, all files available here

then milling it

then soldering it

then uploading the arcuinoC code which is available here

adding a charging socket and on/off switch

and here we go

to connect the the watch to your android you can easly download the app from google play or you can download it from here

all you need to do is just pair your android with the HC-05 module

the HC-05 default password is "1234"

then open the app

adding the bracelet

here's a video of the watch