pxSat3D vs Stars Units Sizes Objects
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
pxSat3D
Visualize real-time satellite orbits around Earth. Explore the density of specific satellite types in orbit. Performance may vary on older devices.
- Real-time satellite tracking
- Visualize satellite orbits
- Quantify satellite types
- Space traffic visualization
- Educational space data
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This application will show the space traffic with the satellites currently orbiting . You can visualise the quantity of satellite for one type. Note : on older devices, displaying of numerous objects can be slow.
Stars Units Sizes Objects
Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.
- Compare object sizes
- View object images
- Pinch/Zoom and Pan images
- Unit conversion for distances
- Explore scales from Planck length to observable universe
- Learn about stars and galaxies
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Size of the smallest to largest objects and stars. Compare the size of objects in the universe. Object images. Pinch/Zoom image. Pan/Move image. Rotate image. Double tap to reset an image. From the smallest to the largest one. From planck length to observable universe. From Yoctometre, Zeptometre, Attometre, Femtometre, Picometre, Nanometre, Micro, Millimetre, Centimetre, Metre, KiloMetre, Lightyear, Parsecs, Billion Lightyears to 93 Billion Lightyears. Size of objects, particles, atoms, cells, stars and galaxies. Get to know the stars. Get to know the spaces. get to know the universe. How small is this world. How big is the universe. And How great is the creator. How far is the star distance from earth. Two way 18 distance unit conversion. planck length, yoctometer, zeptometer, attometer, femtometer, picometre, nanometre, micrometre, Millimeter, Centimeter, Meter, Kilometer, Inch, Foot, Mile, Astronomical, Lightyear, Parsecs. Perform auto conversion when picker is changed. Share conversion result. Reset unit convertor.
Screenshots
Verdict
The clearest difference is in-app purchases: Stars Units Sizes Objects at none against pxSat3D's 2. Stars Units Sizes Objects also leads on iOS requirement (11.0 vs 13.0). pxSat3D's advantage is ads (none vs shown) and rating (4.5 vs 4.2). On price, ratings volume, update cadence and device support there is nothing between them.
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. pxSat3D sells 2 one-off in-app purchases. Stars Units Sizes Objects asks for nothing beyond the download.
pxSat3D holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 100% of pxSat3D's written reviews are positive against 80% of Stars Units Sizes Objects's.
pxSat3D ships an update every 3 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.
| Parameter | pxSat3D | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 4.2 (5 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | P'tit Xav | Mudarmeen Munlin |
Customer experience
pxSat3D
Stars Units Sizes Objects
In-app purchases
pxSat3D
- Tip$0.99
- Tip$2.99
Stars Units Sizes Objects
No in-app purchases
Questions
Is pxSat3D free?
Is Stars Units Sizes Objects free?
Which has better reviews, pxSat3D or Stars Units Sizes Objects?
Do pxSat3D or Stars Units Sizes Objects have ads?
Which is updated more often, pxSat3D or Stars Units Sizes Objects?
Other comparisons
