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. 2025 Aug 7;14:e69686. doi: 10.2196/69686

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©Johannes Leimhofer, Milica Petrovic, Andreas Dominik, Dominik Heider, Ulrich Hegerl. Originally published in the Interactive Journal of Medical Research (https://www.i-jmr.org/), 07.08.2025.

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 the Interactive Journal of Medical Research, is properly cited. The complete bibliographic information, a link to the original publication on https://www.i-jmr.org/, as well as this copyright and license information must be included.

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Annual hardware component availability on Android and iOS smartphones from 2014 to 2024 as of September 2024. (A and B) Availability of accelerometer, barometer, battery Bluetooth, camera, cellular network, GPS, and gyroscope components on (A) Android and (B) iOS. (C and D) Availability of humidity, light, magnetometer, microphone, proximity, step counter, temperature, and Wi-Fi components on (C) Android and (D) iOS. The data for each hardware component are plotted in chronological ascending order to depict the availability trend throughout the years. The charts in B and D are missing a bar for 2024 because there were no existing iOS specifications for 2024 as of September 22, 2024.