**Acknowledgements**

The research was supported by Estonian ICT Center of Research Excellence EXCITE, Estonian Research Council (grant IUT1911), European project H2020 Flag-ERA JTC 2016 CONVERGENCE and Estonian IT Academy scholarships. The work has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 668995. This material reflects only the authors' view, and the EC Research Executive Agency is not responsible for any use that may be made of the information it contains.

*Wearable Devices - The Big Wave of Innovation*
