OK conceptually but somewhat flawed in the delivery. Crashes easily. Needs tweaking and a Help section.
It does what it says it should do
dpi calc it works fine. . .
Doesn't work on Nexus 7 (2013) with Lollipop App crashes right away. Won't start.
Pretty bad Ironically, this DPI calculator works badly on devices with a high DPI.
Try a new LCD screen density, if you don't like it, reboot! DOES NOT WORK ON 5.x
List the details of all USB devices attached to an Android device with USB host
Your smart light bulb will react to notification received by your Android device