Extreme+ offered by HLB Controls LLC is an iPhone and iPad regular and scientific calculator that provides both normal and extreme decimal precision, variable from 2 to over 4500 accurate decimal places.
Depending upon the user, calculations can be made that exhibit a high degree of confidence and a low propagation of uncertainty. Often such calculations are required in statistical analysis, scientific and other disciplines. For example, NASA will use such calculations to monitors the space integrated global positioning system/inertial navigation system (SIGI) or in space flight guidance, navigation and control (GN&C).
In the world of academia, and in particular pure mathematics, the high resolution calculations provided by Extreme+ can be used to develop and explore various algorithms. For example, it can easily show that the transcendental functions for the most part are irrational (i.e., pi is irrational).
Math students and the like will find that if nothing more, just exhibiting such common functions involving roots, powers, series and etc with extremely accurate decimal places can be enlightening within itself.
Finally, it should be noted that Extreme+s resolution accuracy can be varied from 2 to over 4500 decimal places. Older iPhone and iPad devices (example - iPhone 4S, iPad 2) are supported with maximum decimal resolutions of over 2000.