Off topic but I'm curious. I've seen lots of people telling others they've been downvoted. How are you able to tell? Are you using a specific app or just the we

Off topic but I'm curious. I've seen lots of people telling others they've been downvoted. How are you able to tell? Are you using a specific app or just the website, is there a number like reddit or just the slight greying seen in soon to die posts. Just curious since i have no ability to see downvotes