FredSky vs Satellite Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FredSky
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FredSky turns your iPhone into a pocket planetarium. Look up, then at your phone, and instantly see what's overhead right now — the stars and constellations, the Moon and planets, and satellites passing over. The all-sky chart is centered on the zenith, like lying back and looking straight up, drawn for your exact location and moment. Raise your phone toward the sky and FredSky switches to a live camera view with the brightest objects labeled where you're aiming. Lower it, and you're back to the chart. • Live star chart — stars to naked-eye brightness, the classic constellation figures, the planets, the Moon at its true phase, and visible satellite passes. • Fully offline — the entire star catalog is built in, so the sky is right whether or not you have a signal. • Point-and-look — hold your phone up to identify the bright star or planet you're looking at. • Bird songs, too — tap record and FredSky identifies the bird singing nearby, then keeps your sightings as an illustrated life list. • Red night mode — a one-tap, dark-adapted view that protects your night vision outdoors. No account. No ads. No tracking. Just look up. Positions, phases, and pass times are computed properly — the numbers stay serious, even though the whole app is built to answer one question fast: what is that?
Satellite Tracker
Explore a live, 3D map of over 14,000 satellites orbiting Earth in real-time. Discover upcoming visible passes, identify objects in the sky with augmented reality, and learn about each satellite's orbit and history.
- Live 3D satellite map
- Visible pass predictions
- Augmented Reality (AR) mode
- Detailed satellite information
- Offline catalog
- Search and share satellites
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Every satellite in the sky, live on a spinning globe — all 14,000 of them. Satellite Tracker draws the whole catalog moving in real time: Starlink's woven shells, the GPS constellations, the ISS and Tiangong, spent rocket stages and tumbling debris. Filter by constellation or by nation, crank time to 600× and watch low orbits swirl while the geostationary ring hangs still. TONIGHT'S SKY See which satellites you can watch with your own eyes tonight — sunlit passes over your location, with rise direction, peak height and duration. Get an alert 10 minutes before, walk outside, look up. POINT YOUR PHONE AT IT AR mode draws satellites on your real sky. Pick the ISS, follow the arrow, and the station is right where your camera points. EVERY SATELLITE HAS A STORY Tap any dot for altitude, speed, period, inclination and its full orbit ring. Search 14,000 objects by name. Share any satellite with a friend. Works fully offline with a bundled catalog; live orbital elements when connected.
Screenshots
Verdict
FredSky and Satellite Tracker are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | FredSky | Satellite Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | — | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 21 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederick Duggan | Cinnamon Mobile LLC |
In-app purchases
FredSky
No in-app purchases
Satellite Tracker
No in-app purchases







