Gaining weight

On another <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> that I have called what to expect it says that you should gain about 14-15 pounds in your second trimester but only 10 pounds in the third trimester. I was always under the impression that you gained most of the weight at the very end. Any body have any personal experience with this? Thoughts? Or opinions?