3 Grams LiteWeight, a free app created by Rizbit, acts like a digital mini scale. It estimates the weight of tiny things like coins or jewelry by using the tilt sensors in your phone. Think of it as a pocket digital scale once you've set it up.

But remember, its precision relies on your phone, how well you've set up the sensor, and how well you balance your phone. Don't worry, there are voice and visual guides to help you set up the app.

The app is easy to use and lets you show weights in various units like milligrams (mg), grams (g), and pounds (lb). Plus, you can set it up again and again as needed.

A neat feature of this app is its visual scales. This uses your phone's camera to give a ballpark figure of larger items' weight. You can either buy credits to set up the app or earn them for free by watching ads or accepting offers within the app.