In August 2014, Opensignal raised a $4 million Series A investment from Qualcomm Ventures, OATV and Passion Capital.
The service is a part of their carrier maps, which are colour-coded to show areas of strong and weak cell phone signal.
They have worked with the BBC[6] and TV 2 (Denmark)[7] to create interactive maps of 3G 'notspots' in the UK and Denmark and have also produced general reports, on topics as diverse as how cell phone screen size affects data use[8] to the state of "Android Fragmentation" — that is, the vast array of different types of Android devices in use; some models having very few users.
[10] It makes use of native sensors on the phones, such as barometers, hygrometers, thermometers, magnetometers and lux-meters, to collect information sent in real-time to create live weather maps.
By crowdsourcing from client devices, the firm can build a picture of the network as it is experienced by its users, rather than modelling coverage using drive testing.