The iPhone 6S and iPhone 6S Plus devices both have a pressure-sensitive feature known as 3D Touch, adding a new dimension to the touchscreen. The pressure-sensitive feature adds to the tap, pinch-to-zoom and swipe gestures that smartphones are known for. Apple’s 3D Touch is able to distinguish between soft and hard presses. A soft press lets you “Peek” at an email or website and a hard press will “Pop” open the selected message or website in Mail or Safari.
In the video above, there is a demonstration of Gladman’s app — which can differentiate the weights of plums using the 3D Touch feature in the iPhone 6S — called “Plum-O-Meter.”
The “Plum-O-Meter” app is not available in the Apple App Store, But Gladman uploaded the source code for the app on his GitHub repository. From there, you will need to “sideload” the app.