"There's an app for that." Who'd have ever thought that would be the case for something as fundamental as a ruler or a measuring tape? But here we are. If you're reading this, you may already know ...

The "Walking Steadiness" feature on iPhone can track how steady you are when walking and notify you if you're unsteady or at risk of falling.

It's easy to measure the distance between multiple points on Google Maps on your phone or computer. Here's how to do it.

Before diving into the methods, it's essential to understand the difference between altitude and elevation. Altitude refers to the height of an object or place above a given planetary reference plane, ...