Is that true? Read the last paragraph here: https://developer.apple.com/library/content/qa/qa1779/_index.html https://developer.apple.com/library/content/qa/q

Is that true? Read the last paragraph here: https://developer.apple.com/library/content/qa/qa1779/_index.html https://developer.apple.com/library/content/qa/qa1779/_index... "For devices running iOS 7.1 and later, the update package may include only the differences between the old and new versions of a changed file instead of the full file. This may significantly reduce the size of the update package in the case where only a small part of a large file changes" (Not sure why it says "may")