I really dislike how TIL is cramped with "stories". For example in your screenshots there is a story about two twins doing the same thing. Like it is interesting, but how is this a "fact" worth learning? It's the reason I unsubscribed from the subreddit. Just venting I guess.
The app looks nice although I haven't tried it. It's nice that you support lower versions of iOS (I'm using iOS 9).
The cards are kinda tall, seems like it would look kinda ugly on larger devices when there is a low amount of text.
I really like the concept. One small improvement I would recommend is to allow cards to be swiped in any direction, specifically up or down. Depending on how you are holding your device, it can feel more natural to swipe up to discard, for example.
This is great. TIL notifications are my favorite thing about the Reddit app (right behind /r/explainlikeimfive). So my only suggestion is to add notifications for new, trending ones.
The app looks nice although I haven't tried it. It's nice that you support lower versions of iOS (I'm using iOS 9).
The cards are kinda tall, seems like it would look kinda ugly on larger devices when there is a low amount of text.