ISS Tracker for iPhone and iPad
Everything on issinfo.net in your pocket. Track the International Space Station live on an interactive 3D globe, predict when it will next be visible from your exact location, meet the current crew, and follow Artemis Moon missions: all for free, with no advertisements, no subscriptions, and no account required.
Features
- Live ISS position on an interactive 3D globe
- Pass prediction with one-tap geolocation
- Current crew biographies and photos
- Artemis mission tracker with Orion replay
- Earth Gallery: astronaut photography archive
- Push notifications for visible passes overhead
- Works offline once cached
- No ads, no subscriptions, no account required
About the app
The ISS Tracker app is a native iOS companion to the issinfo.net website, built from the ground up for iPhone and iPad. It shares the same data pipeline as the web app: a hand-tuned SGP4 orbital propagator seeded with the latest Two-Line Element set from Space-Track.org for the live position, NASA JPL Horizons for Artemis trajectories, SpaceDevs Launch Library for crew biographies, and N2YO for high-accuracy pass predictions tailored to your geolocation.
The app is optimised for the things people actually want to do on a phone: open it on a porch and immediately see where the ISS is, get a notification before a bright pass, scroll a list of crew with photos, and replay an Artemis mission at variable speed. There is no advertising and no subscription model. The project is funded by us, for us, and shared free with anyone who finds it useful.
Frequently asked questions
- Is the ISS Tracker app free?
- Yes. The app is completely free to download from the App Store and contains no advertisements, no in-app purchases, and no subscriptions. There is no account or sign-up required.
- Which iPhone and iPad models are supported?
- The app runs on iPhone and iPad with iOS 15 or later. It is optimised for the larger displays of recent iPhone Pro and iPad Pro devices and supports landscape, portrait, and split-view layouts.
- Does the app work without an internet connection?
- The app caches the latest Two-Line Element data on launch so the live ISS position keeps propagating accurately for several hours even when offline. Crew biographies, photo gallery contents, and news feeds require a network connection to refresh.
- Will the app notify me when the ISS passes overhead?
- Yes. Enable push notifications in the app settings and grant location access. The app will alert you a few minutes before a bright visible pass from your location so you have time to get outside and look up.
- Does the app track Artemis missions too?
- Yes. The Artemis tab in the app mirrors the web tracker at issinfo.net/artemis, with the same JPL Horizons trajectory data, mission replay, crew information, and DSN signal status for active Artemis missions.
- How accurate is the ISS position on the app?
- The app uses the same SGP4 orbital propagator that powers the web tracker, seeded with the latest TLE published by Space-Track.org. Position accuracy is within a few kilometres at any given moment, comparable to commercial-grade satellite tracking software.
Download
Available on the App Store for iPhone and iPad. Free to download.
Download Free on the App Store