Typically listed at $24.99 on MacUpdate and the Apple App Store .
If you'd like, I can help you find or a comparison of similar free alternatives (such as Free Ruler) to see if they meet your needs. PixelStick for Mac Navigators PixelStick 2 for Mac Free Download
Features vertical and horizontal guidelines to help with alignment and layout. Technical Requirements Typically listed at $24
Modern macOS versions (Catalina 10.15+) require Screen Recording and Accessibility permissions for the tool to "see" and measure on-screen content. PixelStick 2 for Mac Free Download
Some software repositories list a trial version, and developers sometimes allow users to run the app to test its features before purchasing.
PixelStick is categorized as shareware or a one-time purchase.