This story was originally published and last updated .
Modern smartphones can feel like technological black boxes. The mobile operating systems that power them have become incredibly complex, with often hundreds or possible even thousands of various functions that can trigger things like your GPS, cellular modem, or Bluetooth radio. Even when you tell your phone to turn off certain things, like Wi-Fi, our phones don't always do as they're told. But it doesn't have to be that way, provided you're willing to dive very, very deep into the Linux end of the smartphone pool. The PinePhone is one of the few mobile devices with hardware kill switches for common features, giving you full control over your smartphone.
One neat feature of BlackBerrys is that when you put the phone in its case, the screen automatically shuts off. The effect is only part novelty; after all, by shutting the screen off sooner, you're saving battery (although in all honesty, it's doubtful you're saving that much battery). Developer Fahrbot Mobile has devised a solution for Android that "uses a combination of sensors to control the sleep state and screen lock of any device... at the moment, it uses the proximity sensor, light sensor and accelerometer."
Sleeplessninjas has provided a video overview of the app (disclaimer: it's 6 minutes long):
Hit up the widget below to check out the free version, or jump right into the paid.