Hellobee Boards

I can't help you with an app, but I can give you a tip on how to reduce your time spent on these websites.

Get rid of the apps! When I switched from blackberry to android years ago, I did not download the facebook app to my phone because I was uncomfortable with the permissions needed. So I used the mobile website instead. My time on facebook reduced drastically! I think it was because I didn't have the app staring at me in the face whenever I went on my phone. And I had to manually type the address in (I didn't have a bookmark for it or anything). I eventually got rid of facebook because I used it so rarely.

If you make it a little less convenient to get to these sites, I think you'll see that you spend less time on them.