Launched this week
Skyty
Your flight's altitude, ground speed, nearest airport + ETA
56 followers
Your flight's altitude, ground speed, nearest airport + ETA
56 followers
Skyty turns your iPhone into an offline flight instrument. See your real altitude above ground, ground speed, heading, nearest airport, and ETA — all calculated on-device using NASA terrain data. No internet, no flight number, no tracking. Just GPS.
Skyty
Hey Product Hunt 👋 I'm Kim, a solo dev from Zürich.
I built Skyty because I kept wondering the same thing on every flight: how high are we actually flying right now? Not the cabin display altitude. The real height above the ground below us.
Turns out you can figure this out with just GPS. Your phone knows its position, and NASA published elevation data for most of the planet (SRTM). Subtract one from the other, and you've got your altitude above ground level. No internet required.
That's basically the whole app. Skyty runs completely offline — no account, no flight number lookup, no data connection. You put your phone in airplane mode, and it works. It shows you:
Your real altitude above ground (AGL)
Ground speed and heading
Nearest airport + distance
Estimated arrival time
Sun position (useful for choosing a window seat)
SOS with your exact coordinates if something goes wrong
The whole thing is native Swift, no external dependencies, runs on iPhone. I'd love to hear what you think — especially if you're a nervous flyer or an aviation nerd. Both camps have been surprisingly enthusiastic in testing.
What's next: Apple Watch complication, widgets, and a flight log.
@leuk Hey, this is awesome. I'll try it soon. Thanks :)
I used AirTrack Classic on my Sim but also while traveling on iOS26. But at some point, not long after TO your GPS stops working. Will GPS keep work with this app?
Skyty
@victor_sanz yes it should work as long as you can see some sky from your seat. we tested on more than 20 flights and never had issues
@leuk great!
I’ll try it next week 🛫and let you know
Heading to Hawaii soon and this is going on my phone for the flight. The in-flight display always shows stuff I don't really understand and the UI is terrible — this actually looks useful. One question: any plans for an Android version?