Integral WP 34S iPad vs Physical Device

[lrdheat]

On iPad, I can get a better result if I go to the part of the interval where the meat of the contribution to the area under the curve exists...say from 14.1343 to 14.1404. The actual device finds the meat of the contribution if on fix 4, without the user having to find that portion of the interval.

Is the integration method different on the iPad vs device, or is it that the later version's methodology is different from the earlier version?