Looks like a really interesting idea here! Congrats on shipping. I just downloaded it to play around with. The screenshots are well done and make the app feel like something exciting to try out.

I would work on trying to simplifying the landing page copy, though. The "Stress-Free Bookmarking, Read-it-later, and Clipboard..." text is super long and most people aren't going to read the entire thing. I would try to emphasize what the benefit is to the user somehow. Something like "Save everything easily". That's terrible copy, too, but you get the idea. The "Super Memory Activated" and "doublememory.com" made me think at first that this is improving my computer's memory usage.

After skimming the page, I kind of got the idea about what the product does, but I think you can make it even simpler to grok right away what it does with a few tweaks. Best of luck!

Edit: one thing I noticed is I can do shift-cmd-spacebar to bring it up, but the search text field doesn't automatically get focus. That's a little bit of friction. If I do cmd-F to search, it toggles the filter UI, which was unexpected. I wanted to cmd-F to move the focus into the search to start typing.