
Sean Monahan
Easy access to all of the sensors in my phone! I discovered a bunch of sensors I didn't even know my phone could measure! In addition to computed information like "compass heading" (which way is North), you can see the raw sensor data, e.g. the 3-axis magnetic field strength (x, y, z) in uT. Would love an option for a paid upgrade to remove the ads. The app is fantastic, and it would be wonderful to support the devs without ads.

David Murray
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One of my favorite 'not strictly necessary' apps. Incredibly useful when out and about (in the middle of nowhere), or just pondering physics over a cup of tea. I often take a screenshot of the GPS screen during fieldwork, and reference it in my notes (i.e. surprising stratigraphy along road cuts). Sudden appearance of ads was a surprise, but they've helpfully added an option to turn them off.
39 people found this review helpful

A Google user
Maximizes the usefulness of all the sensors on my note 9, reasonably accurate data (but that's Samsung's responsibility). I wish the app had some way of plotting the barometric readings on a graph, so that I could visualize pressure fluctuations throughout the month, for example. Huge plus to the developers for including the option to disable ads for free, I keep ads on as a little tiny thanks.
17 people found this review helpful