Cameras lens, including CMOS sensors, found on most smartphones, are not only sensitive to visible light but also to other types of waves including Gamma and X waves emitted by radioactive sources.
Covering the camera with something opaque (electrician tape, thumb of the user ...) the lens no longer capture visible light but only Gamma and X waves. Then, the application algorithm counts the number of impacts received and translates into a value in microsieverts per hour.
2. A study of five production-ready applications for vehicles in the model years 2011 and 2012 showed that both the Toyota Entune and Ford Sync AppLink apps achieved industry-leading performance on at least four criteria, including content variety, level of integration, daily relevance and implementation.
Smartphone app integration is a rapidly growing market in the automotive space, with sales of vehicle head units featuring smartphone app integration climbing in the United States from a few thousand units in 2011 to nearly 5 million units in 2018, according to the report.
Among the five car apps, Toyota’s Entune ranked as the top overall, placing first in three of the four categories under evaluation and landing in second next to Ford in terms of implementation. But despite its many allures, Entune at nearly $150 a year is expensive compared to the offerings from other automakers.
Ford's Sync was first in implementation and second in the overall rankings.
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