Disclaimer: 14 CFR 91.3 says that you, the PIC, are responsible for the safety of the flight.  WingX products are intended to assist you in your preflight and inflight activities.  While Hilton Software makes every effort to ensure the accuracy of its calculations and data, Hilton Software cannot absolutely guarantee the accuracy.  By using WingX products, you agree to hold harmless Hilton Software and those persons acting on its behalf for any and all, but not limited to, liability, bodily injury, and/or property damage arising from the use of WingX products.