Android devices do a lot of neat stuff out of the box, but you can always load it up with new apps to make if do more stuff. And maybe some games for good measure. This is the Google Play App Roundup where we tell you what's new on Android. Just hit the links to head to the Play Store.
Your smartphone is bristling with sensors, so why not use them to do some basic science? Google has released a new app that helps you run simple experiments with your phone called Science Journal. It's mostly aimed at getting students interested in science and the process of running experiments, but everyone can learn a little something.
Science Journal accesses three sensors in your phone: the light sensor, accelerometer, and the microphone. In the main interface, you can switch between each of these outputs to see live data as a single number or a graph. In addition, the accelerometer data is split up into X, Y, and Z axis readings. Of course, the app is a super-slick example of material design with bright colors and cool animations.
Down at the bottom of the screen is a toolbar and timecode. This is where you record your data. Simply hit the record button and the sensor data will be archived. You can organize each data set into different experiments and add notes to them as well. The graphs (both live and archived) respond to pinch zoom gestures.
You might be surprised how sensitive the sensors in your phone are, especially the accelerometer. Because this part is designed to measure g-forces, it reads gravitational acceleration at rest, and it's pretty close to the 9.8m/s^2 number we all learned in school. We often think of acceleration in terms of velocity relative to the ground, but this app encourages you to think about it a little differently. For example, in freefall, the Z-axis reads 0 instead of 9.8-ish. I was even able to use the accelerometer to measure my heart rate by laying the phone on my chest.
At the top of Science Journal is a button that links the app with external devices. You probably don't have any of these, but the Google Making and Science Initiative website lists some kits Google helped to design with companies like Sparkfun that will connect to the app, usually via an Arduino. All the data acquired through the app, via both internal and external sensors, can be exported as a CSV file.
The app is free and fun to play around with if nothing else. If you have kids, you might want to use this as a learning opportunity.