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. 2017 Aug 17;5(8):e125. doi: 10.2196/mhealth.6333

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©Edward Price, George Moore, Leo Galway, Mark Linden. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 17.08.2017.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mhealth and uhealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Screenshots of the smartphone app’s four main screens from left to right: Mental Fatigue Scale, Spatial Span Test, Psychomotor Vigilance Task, and Mental Arithmetic Test.