Note: You must have software version 12.0 or greater on your iPhone/iPad. This app takes the single engine rate of climb (SEROC), the Accelerate/Stop (Accel/Stop), and the Single Engine Service Ceiling (SESC) charts in the Beech POH and converts them to a simple, quick, and easy way to estimate your SEROC, Accel/Stop distance & the Single Engine Service Ceiling (SESC) for the Beech Barons 55/58 on your iPhone /iPad with IO470, IO520, or IO550 engines. The app now will also calculate the SEROC, Accel/Stop and the SESC for the BE58P Baron. The app is NOT applicable for the BE55 1961-1963 models, or the BE56/58TC Barons. Accuracy + or - 50 FPM for the SEROC, + or - 100 feet for Accel/Stop and + or - 200 feet for the Single Engine Service Ceiling (500 for the BE58P). Any mods done on your aircraft that affect performance or weight limits are not considered in the calculations. To see the user reviews, click on "Reviews", then "All Versions".