A tool to quickly mockup a design or provide visual feedback, using customized symbols and some sweet copy-paste screenshot action.
This tool lives in the browser, so it always is at your disposal. When you visit the app, it opens a blank canvas. Here you can draw things, or paste images or add symbols.
I made this tool to speed up my workflow. I use it on a daily basis to provide feedback to teammembers and clients, point to issues or quickly add sketches to existing screens to clarify ideas.