I noted an increase in the quoted free storage after the install. But, reading a review I found out they had switched from the power of 2 gigabyte (i.e. 2^30) to the decimal gigabyte, i.e. 10^9. Oh well, the disk manufacturers have been doing that to us almost forever.
iOS 10 is a bit larger than prior versions.
iOS 10 is a bit larger than prior versions.