Bangle.js is an open, hackable smartwatch that anyone can code for - and best of all it's open source so you don't have to worry about a server getting shut down and losing functionality - it's fully self-sufficient. You can easily install new apps from the web or develop your own using JavaScript or a graphical programming language (Blockly). All you need is a Web Browser (Chrome, Edge, or Opera), and you can upload apps or write code to run on your watch wirelessly. Bangle.js is waterproof and AI-enabled and comes with Bluetooth Low Energy, GPS, a heart rate monitor, an accelerometer, and more.

Software Specifications:

Easy to code and debug wirelessly using JavaScript or our graphical editor (based on Blockly)
Pre-programmed with the Espruino Open Source JavaScript interpreter
Vast majority of JavaScript ES5 features and many ES6 features including Regular Expressions, Promises, Arrow Functions, Template Literals
40kB RAM for program memory/variables
Bluetooth 4.2 Advertising, Central and Peripheral mode support with built-in Nordic UART service
Graphics library with Vector fonts, bitmap rotate & scale
Tensorflow Lite for Microcontrollers AI
Wear-levelled flash filesystem
Heatshrink compression
Upload functions written in C or ARM Assembler
Built-in wireless debugging
VT100 Terminal support on LCD
Program with Web-based Web Bluetooth IDE or Node.js-based command line tools