I have an android phone - the nexus 5 and it's a total shitbag right now. It seems like it's slowed down massively. I can't imagine this is only apple.
There's an issue with earlier nexus phones and nand degradation. Lack of TRIM really killed them over time unfortunately. Running some write/read benchmark app and comparing the results against published numbers (like http://www.androidpolice.com/2014/11/20/anandtech-posts-side... ) could (dis-)prove that's the case.
