I had given this a try a week ago. Love the concept, and pretty neatly surprised. But it broke quite a few apps, couldn't get them to load content from the internet many times. Finally had to uninstall out of frustration :/.
Edit: god damn it, they got a C&D: [1]
[0] https://f-droid.org/en/packages/me.austinhuang.instagrabber/ [1] https://news.ycombinator.com/item?id=27969379