The '''Bangle.js'''<ref>https://banglejs.com/</ref> is the name of a series of [[Open Source Device|open source]] smartwatches that are made by [[Espruino]] under the leadership by Gordon Williams, who also designed the [[Puck.js]] open source hardware that can be used as a [[One Button Tracker]]. | The '''Bangle.js'''<ref>https://banglejs.com/</ref> is the name of a series of [[Open Source Device|open source]] smartwatches that are made by [[Espruino]] under the leadership by Gordon Williams, who also designed the [[Puck.js]] open source hardware that can be used as a [[One Button Tracker]]. |