Timehop is delightful and a great example of how powerful nostalgia can be in driving engagement and sharing. It's been around a long time but if you look at the App Store rankings, it's consistently gotten traction. Here's a good article from @humburger on The Verge about it. @michaelsayman do you or friends of yours often share Timehop photos (privately or publicly)? I'm curious how much of a single-player experience it is for most people.

This is rad. So cool to see us floating up here with some of the heavy hitters. To the folks curating this list - what are some of the services you'd want us to see integrate with next? Or feature requests you have? -Jonathan, Co-founder Timehop

We live in an age where albums are no longer made, people restore their phones all the time, and memories are all but gone. Timehop shows us that we haven't lost our memories and that we have them in front of us, within our social networks. Looking back is very important for me and being able to do so with an app like Timehop is a great thing to have.

@jwegener Jonathon, I went to your Product Secrets talk at Spark Capital that Maya from Betaworks organized this summer. (I was an iOS intern at Betaworks). Anyways... I think what's great about Timehop is the personality aspect that a lot of other apps do not have. This is something Alexis Ohanian talks a lot about (Reddit, Breadpig, Hipmunk) The personality of the interface does a good job of helping people remember their past, in a way that is very social oriented. Other apps in this space (Memoir for example) fail in a lot of areas where Timehop succeeds.