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See trouble forming early
Inbound aircraft and ATC signals reveal delay risk before the posted departure changes.
The flight companion for iPhone
Know before the airport tells you.
SecondLeg watches your whole journey—from the aircraft flying in to the moment you land—so gate changes, early delay signals, and the details that matter reach you first.
Join the early-access waitlist
Free early access. No account required.
Built for iPhone
Private by design
Offline-ready
Your next legWatching AC 856
Gate changed
AC 856 now departs from Terminal 1 · Gate C34.
AC 856 · TODAYON TIME
YYZ → LHR
★★★★★
“It told me about the gate change while the agent was still updating the board.”Marcus · early tester
The airport information gap
Your flight is changing. Your airline app is still catching up.
Airline apps show the official answer. SecondLeg watches the signals around it—your inbound aircraft, turnaround time, ATC advisories, and live operations—then tells you what they mean.
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The inbound aircraft is 45 minutes late
See the risk before your departure time officially moves.
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A ground stop just hit your destination
Know whether it affects your flight—in plain language.
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The terminal Wi-Fi disappeared
Your latest gates, times, and route stay available offline.
Less uncertainty. Better travel.
Everything you need, exactly when you need it.
SecondLeg turns flight data into calm, timely decisions—not another screen full of aviation codes.
✦
Never hunt for the update
Gate, countdown, and live progress stay on your Lock Screen and Dynamic Island.
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Keep every mile
Each completed leg becomes part of a private, on-device passport of your life in the air.
How it works
Add the flight. We’ll watch the rest.
Bring in your trip
Search a flight, paste an itinerary, or scan your calendar. It takes seconds.
SecondLeg keeps watch
Live operations, inbound aircraft, gates, and advisories are checked as your trip approaches.
You get the useful answer
Timely alerts arrive where you already look—without booking codes or private trip data leaving your phone.
From early flyers
Built for people who live in the sky.
★★★★★
“The globe home screen alone is worth it. I open the app just to watch my flight move.”Priya · early tester
★★★★★
“The Lock Screen widget is the whole app for me. I stopped opening apps at the airport.”Renata · TestFlight
★★★★★
“There are flight trackers, then there’s the passport of your whole life in the air.”Sofia · early tester
Questions, answered
Before you board.
Is SecondLeg another airline app?
No. Airline apps tell you about one carrier. SecondLeg follows your whole journey across airlines and turns live operational signals into useful, personal updates.
How can it spot delays early?
SecondLeg watches signals such as your inbound aircraft, its turnaround window, airport conditions, and ATC advisories. These can reveal risk before an airline changes the official departure time.
Do I need to create an account?
No. Your flights, friends, settings, and passport are designed to work locally on your device without an account.
What data leaves my phone?
Flight identifiers and dates are used to retrieve operational information. Private details such as booking codes, seats, calendar contents, and notes stay on-device.
Will it work with poor airport Wi-Fi?
Yes. Every tracked flight keeps a recent offline snapshot of the details you are most likely to need.
Which devices are supported?
This early release is being built for iPhone, including Lock Screen widgets, Home Screen widgets, and Live Activities.
How much will early access cost?
Joining the waitlist is free. Pricing details, if any, will be shared before launch so you can decide before installing.
Early access
Make your next flight the one you see coming.
Join the waitlist and be among the first to fly with SecondLeg.