After seeing the huge success of apps like TimeHop and Meerkat within their user’s feeds, Facebook and Twitter have launched copycat services of their own.

First, Facebook has launched a new “On This Day” page where users can see their Facebook activity on this day in history dating back to when they launched their account. The items are displayed in a chronological feed like the widely popular TimeHop app.

Facebook’s “On This Day” is interesting because you can see how people used the social networking service several years ago. For example, multiple people wrote on my wall on this day in 2008 to tell me they were jealous that I was going to visit the set of Twilight. Today, people would just share their jealousy in a reply to my Facebook status (if anyone was still a fan of Twilight, of course).

“On This Day” is slowly rolling out to new users. I was invited to see the feature and enable notifications on Thursday morning.

Second, Twitter has launched a clone of the recent Meerkat phenomenon called Periscope. It lets you stream live video from your phone camera to the world, with comments from viewers coming up over top of your screen so you can receive real-time feedback:

The one major difference between Meerkat and Periscope is that the latter lets you see previous recordings. Meerkat does not let you watch video unless it’s currently live, giving it a vibe similar to SnapChat.

Time will tell if Facebook and Twitter are able to surpass TimeHop and Meerkat. Facebook’s “On This Day” will probably be a huge hit thanks to the fact that it’s built into the website and mobile app. Periscope’s future seems less certain, as many celebrities have already started using Meerkat and may stick with it now that they’ve built a community there.