Free window-snapping app for Mac

Have a look at Rectangle

Putting aside the part that you never seem to look for any of the things you want yourself, have you looked in the App Store for "window snapping", like I did just now?

There are only a few with high ratings, and none are free.

We are not your personal shopping assistant.

Search the App Store or google it.

At the very least, post an actual question.

What is “like the windows effect”?

FYI, you can take a screenshot of the active window (and only the active window) by pressing Command-Shift-4, then the space bar, then click the ‘camera cursor’ on the window or press the return key.

What's wrong with the window snapping macOS already does? How would a third party app do anything different?