The apps on my phone consume 4 GB. Add that to the 3GB for iOS, and that a total of 7 GB. I had the S7 Edge, and had basically the same apps. I was using close to 16 GB with that phone. 16 vs 7. That a huge issue with Android.
Not exactly a huge deal on a phone that comes standard with 64GB as minimum and where you can pop in up to 256GB of extra memory though, is it?