Planetary Weather vs Stars Units Sizes Objects
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Planetary Weather
Explore real-time weather conditions on planets, moons, and the Sun in a stunning 3D solar system model. Get daily temperature and wind speed forecasts with accurate data.
- Daily temperature and wind speed forecasts
- Data for planets, moons, and the Sun
- Accurate estimates from NASA/NOAA
- Stunning 3D solar system renders
- Metric or Imperial units
- High-quality graphics
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Ever wanted to know today's temperature on Mars, or the current wind speed on Saturn? Now you can! Check out today's average temperature and wind speed on every planet in the solar system, as well as the most important moons and the Sun, all while viewing the solar system in stunning 3D the likes of which you have never seen before on your phone! Features Include: • Daily temperature and wind speed forecasts for all the planets, important moons, the Sun, and of course, Pluto. • Accurate estimates of daily planetary weather conditions based on NASA and NOAA data. • Correct Time of day for earth and lunar phase for our moon • Beautiful 3D renders of the solar system for you to explore • Metric or Imperial units • Among the highest quality graphics you've ever seen in a solar system application.
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 Planetary Weather's 2. Stars Units Sizes Objects also leads on rating (4.2 vs 4.0). Planetary Weather's advantage is ads (none vs shown) and review sentiment (100% vs 80%). 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. Planetary Weather sells 2 one-off in-app purchases. Stars Units Sizes Objects asks for nothing beyond the download.
Stars Units Sizes Objects holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews complicate that: 100% of Planetary Weather's written reviews are positive against 80% of Stars Units Sizes Objects's, so the app with the better star average is not the one people write more warmly about.
Planetary Weather ships an update every 7 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on June 1, 2026 and September 22, 2026 respectively.
| Parameter | Planetary Weather | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (11 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 11 — better | 5 |
| Update frequency | Every 7 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 118 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Technospirits | Mudarmeen Munlin |
Customer experience
Planetary Weather
Stars Units Sizes Objects
In-app purchases
Planetary Weather
- Gas Giants$0.99
- Moon Pack$1.99
Stars Units Sizes Objects
No in-app purchases
Questions
Is Planetary Weather free?
Is Stars Units Sizes Objects free?
Which has better reviews, Planetary Weather or Stars Units Sizes Objects?
Do Planetary Weather or Stars Units Sizes Objects have ads?
Which is updated more often, Planetary Weather or Stars Units Sizes Objects?
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