Every weather model. One balloon briefing.

Where, when, go.

Use your location or type any town, pick the day and time you'd launch, from an hour from now in the hotel to five days out, and tap Run full review.

The answer comes first: GO CAUTION NO-GO, with the reasons, the FAA airspace check, and fog and thermal timing. Not sure about something? Ask about it right there on the briefing.

Every altitude on one screen, every model behind it.

HRRR, NBM, GFS, ICON, ECMWF, GEM, the UK Met Office, Météo-France, JMA and more, blended the right way, with vector math, never by averaging directions. Surface to 5,000 feet, hour by hour, with drift arrows, how many models agree, and the outliers flagged.

Where to launch, and where you'll come down.

• Every park, sports field, school, church and small airfield nearby gets a simulated flight on the blended winds.
• Ranked by what lies downwind: towns, water, power lines, airports and controlled airspace count against a site.
• Landing fields on the drift line at 45 to 75 minutes, with local pilots' green zones and churches first, and nothing inside a red zone.
• Directions to every launch and landing spot for you and your chase crew.

Your balloon measures the winds aloft.

Tap Fly and tracking starts: heading, altitude, climb rate and speed. Your balloon moves with the air, so your track is the wind. The Wind data panel shows heading and speed at every altitude band you've flown through, with the forecast beside it, so you know where the turn is when you want to steer. Power lines show in red on the map.

Every power line we can find, in solid red.

Power lines are the most dangerous thing in ballooning, so every map in Fox Hot Air draws them as one solid red line, wherever you are in the US.

• Where they come from: OpenStreetMap's power network, the transmission and distribution lines that utilities and volunteers have mapped.
• Filling the gaps: where only the poles are on the map, Fox Hot Air joins neighboring poles (less than about 300 ft apart) into a line, because that's how lines run along roads.
• On the map, not in your face: no alarms or pop-ups. Almost every road has a line, and constant warnings would only distract you while you fly.
• Ready in the air: lines load for the area around you and are kept on your phone, so they stay on the map if your signal drops.

Not every power line is mapped. There's no public national database of power poles, so treat the red lines as a help, not a guarantee, and always look.

No more hunting for a local to AirDrop the map.

Local pilots share their red and green landing zones once, straight from Google Earth (KML or KMZ). Every Fox Hot Air pilot flying in that area sees them on their maps automatically, with the notes that matter: "No landing, livestock." "Gate code on the post." As pilots add their areas, it covers the whole country.

Every flight, and proof of every briefing.

Flights are saved to your account with your track, pibal, notes and the winds you measured. Every briefing is saved with the time it was pulled and every source it checked, so a record that you reviewed all available weather information is there if you ever need it. Nothing is sent to the FAA.