iOS shipping size too large

My development binary ipa is 122Mb, which is perfect, but when I ship it it goes up to 212Mb which rules out non-wifi downloads and damages my app. I had to ship it at this size as I couldn’t wait any longer, but would be great to bring the size down in future versions - any ideas?

In particular, how come distribution/shipping configuration increases the size so much?

Bump . . .