Simple Xwind vs Peggy Pal

You're on short final when the tower provides updated winds. The conditions have changed more than expected, and there’s no time for mental math to determine if you're within crosswind and tailwind limits. Xwind gives you quick and precise calculations when you need them most. No clutter, no unnecessary graphics—just a fast, reliable crosswind calculator built for ease of use. Unlike other bulky apps, Xwind is designed for speed and simplicity, so you can get the data you need instantly. No extra clicks, no distractions—just numbers.

Peggy Pal puts the numbers a tanker crew actually needs in one place — holdover times, wind additives, frag math, fuel planning and the mission timeline. Made for KC-46 and KC-135 crews. WINTER OPS • Holdover times from the 2026–27 FAA Holdover Time Guidelines. Set fluid type and concentration, precipitation, visibility, day or night, and OAT, and get the FAA range for those exact conditions. • METAR auto-fill: enter an ICAO and the app reads temperature, visibility and present weather off the current report, then selects the right FAA table. • Live countdown timer with a Lock Screen Live Activity, so the clock keeps running while you finish the checklist. Start it now, or back-date it to when the final application began. • The full FAA holdover tables are bundled in the app, so they are there with no signal. • Cold weather altitude corrections for IAF, FAF, MDA/DA and missed approach altitudes. KC-46 WIND ADDITIVE • Set the wind on a graphic runway compass or type it in. Headwind component, crosswind component and vREF additive update live as you move the dial. FUEL AND FRAG • Frag calculator: current fuel, offload remaining, bingo and planned exit time give you time remaining on station, max time on station with and without the frag, and fuel plus-minus. • Fuel load estimator: flight time, offload and desired landing fuel produce a ramp load with a tank-by-tank breakdown you can share. • KC-46 and KC-135 fuel flows built in, or enter your own. MISSION TIMELINE • A full sequence of events from one takeoff time — show, brief, bus, takeoff and end of FDP, in Zulu and local. • Basic or augmented crew, local or TDY timelines, and editable offsets so the times match how your unit actually runs. • Optional duties prompt and standing aircrew notes, then share the SOE with the crew in a tap. CREW REST • Post mission crew rest from departure and mission completion times, across time zones, ready to share. Peggy Pal is an independent planning aid from Southwind Digital. It is not affiliated with, endorsed by or sponsored by the United States Air Force, the Department of War, the FAA or Boeing. It does not replace your flight manual, applicable tech orders, the official FAA Holdover Time Guidelines, or your unit's guidance. The pilot in command remains responsible for accuracy of information used from this tool. Found a problem, or want a tool added? Settings has a Send Feedback link that comes straight to me.