AircraftPower vs SkewTLogPro Usage & Stats
AircraftPower is an Aircraft Engine Performance App. It uses a standard reciprocating engine performance model to calculate and display the sea level and altitude performance of 74 normally-aspirated Continental® engines and 108 normally-aspirated Lycoming® engines.
A graphic display shows the engine performance chart and illustrates the manual construction method for determining altitude performance that we learned in ground school (and promptly forgot). As the user changes the input values, using the sliders or the custom keypad, for manifold pressure (or % power), rpm, pressure altitude and outside air temperature, the power output and percent power (or manifold pressure required) are displayed, and dotted lines and colored dots in the graphic display follow the manual construction method. While the graphics aren't really necessary, they are instructive (and interesting) to watch.
The user may choose english or metric units for altitude, altimeter setting, temperature, manifold pressure and power output (however, the graphic always uses english units), and may select default values for the inputs and the engine. The user can also choose to input the indicated altitude instead of the pressure altitude (the default), and choose to input the % rated power instead of the manifold pressure. If using the indicated altitude, an input window for the altimeter setting appears.
- Apple App Store
- Free
- Utilities
Store Rank
- -
SkewTLogPro gives you one-touch access to powerful skew-t log-p charts. View charts using your current GPS location, airport ID code or lat/lon. Each skew-t log-p chart provides a visual indication of temperature, dew point, winds aloft, and wind speed at various altitudes.
FEATURES:
• Ability to view the lifted parcel line
• Support for Canadian Airport IDs
• View charts along your route using 'View Route'
• Support for GFS for all locations outside the continental United States (Option in Settings)
• View many values such as CAPE, LI, LCL, and many other options through settings
• Save charts for offline use
• View Skew T Log soundings by touching a location on a map
• One-touch access to skew-t log (p) charts from anywhere in the United States.
• View skew-t log(p) charts using your current GPS location, airport identifier or latitude and longitude.
• Scroll forward and backward to view past and forecast charts.
• History list allows easy access to previously viewed locations.
• Select how many previous and forecast hours are charted
• Double-tap to zoom in for more detail on the soundings.
• Great for aviators, glider pilots and weather enthusiasts.
An annual subscription is required to access these graphs and to use SkewTLogPro for $12.99 per year. Cancel anytime. Please view the End User License Agreement here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Apple App Store
- Free
- Utilities
Store Rank
- -
AircraftPower VS. 
SkewTLogProJanuary 11, 2026