When the iPhone 6s debuted, it included what could be a game-changing feature in the mobile world: 3D Touch. Basically, the iPhone can tell how hard you're pressing the screen and make certain things happen at certain pressure levels. Right now, there aren't many apps that support it, and its uses are limited, but some people have ideas for doing things you might not expect.
Design engineer Ryan McLeod, for example, created an app called Gravity. It uses the iPhone's 3D Touch feature and a spoon to turn a phone into a weighing scale. Which would be pretty cool. That is, if Apple would approve it.
In a recent article on Medium.com, McLeod described the process of creating the app, as well as the struggles he encountered trying to get the app approved in the Apple App Store. On October 7th, the app was rejected by Apple because there were a couple dozen scale apps in existence already. Check out one we've covered before.
McLeod responded to the rejection by explaining most scale apps in existence were bogus apps, used for entertainment purposes only. He recorded a demo showing how Gravity works, and explaining that his app was a true weighing device -- and it actually works, unlike the rest of them.
The app is calibrated using three quarters and a spoon, and then can be used to measure items up to 0.8 pounds (385g). The spoon is used in the weighing process since it is conductive and acts like a single-finger touch point.