Akvo Caddisfly Fast and easy drinking water fluoride testing using a smartphone by Hans Merton, Samuel Rajkumar

Akvo Caddisfly is a simple, fast, portable and low cost drinking water testing kit that can be used anywhere to quickly analyse the level of fluoride in drinking water, using a smartphone. Currently under development, it also allows water quality data to be accurately mapped and shared online. Both its hardware and software are open source.