How often do you actually check what your competitors are doing?

When you’re preparing to launch, you know every single feature your competitors have. But a few months in, you're so busy fixing bugs and talking to users that you completely lose track of what they're up to.

I used to check competitor sites every few months, but by then, their pricing or main message had usually changed without me noticing.

At the same time, looking at them every day just stresses you out and makes you copy things you shouldn't.

What’s your realistic routine for keeping an eye on the market and what kind of update actually makes you change your own plans?