Ruler by Xalpha Lab is a great example of a good ruler app. The app is entirely free with no ads or in-app purchases. It also comes with both imperial and metric units for your convenience.

The Re-ruler is constructed from aerospace grade aluminum and offers both inches and mm together with a handy angle guide, compass, removable level and embedded magnets for easy storage.

Titaner's new Mix 3.0 ain't your average ruler. The clever dual-scale device boasts attributes such as an extendable measurement system, a measuring caliper, a magnetically retained pen, and a ...

Learn how to change Ruler unit in Word, Excel, PowerPoint from default inches to cm, mm, points, picas via Settings, Registry or Group Policy Editor.

Adafruit writes: Measuring approx 1″ x 6″, this standard-thickness FR4, gold plate ruler has the most common component packages you’ll encounter. It also has font size guide, trace-width diagram, and ...