This is an awesome tool, however, the pricing is lot costly to subscribe as most of these tools are already available for free.

* Ruler - Dimensions for Chrome * Assets - Easily get from network tab * Eyedropper - Digital color meter on MacOS * Custom CSS - Stylebot for Chrome

The only tool that I personally don't know is the color palette from the page - but then Eyedropper itself can do it.

And thus comes the question, why should I pay $30 per month for tools that are available for free to a developer?