Solary vs Stars Units Sizes Objects
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solary
Explore our solar system in augmented reality. View individual planets or the entire system in orbit. Interact with celestial bodies by rotating, scaling, and repositioning them. Enhance your experience with a galaxy background.
- Augmented reality solar system exploration
- View individual planets or the full system
- Interactive planet controls (rotate, scale, move)
- Adjustable rotation animations
- Galaxy background option
Read full descriptionHide full description
Solary is an AR app which lets you inspect each planet of our solar system. You can choose each planet one by one to check them out closely, or you can choose the whole solar system to experience all the planets orbiting around the sun. During the AR experience you can start and pause rotation animations, move the planets up and down, scale them or rotate them by yourself. If you really want to feel like you're in space, then tap on the galaxy button to enable it as a background.
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
Read full descriptionHide full description
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 Solary's 3. Stars Units Sizes Objects also leads on update cadence (every 4 months vs every 30 months) and iOS requirement (11.0 vs 14.0). Solary's advantage is ads (none vs shown) and review sentiment (100% vs 80%). On price 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. Solary sells 3 one-off in-app purchases. Stars Units Sizes Objects asks for nothing beyond the download.
Solary ships an update every 30 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.
| Parameter | Solary | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.2 (5 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Every 30 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, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 109 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Gyorgy Borz | Mudarmeen Munlin |
Customer experience
Solary
Stars Units Sizes Objects
In-app purchases
Solary
- Tip$0.99
- Big tip$1.99
- Giant tip$2.99
Stars Units Sizes Objects
No in-app purchases
Questions
Is Solary free?
Is Stars Units Sizes Objects free?
Do Solary or Stars Units Sizes Objects have ads?
Which is updated more often, Solary or Stars Units Sizes Objects?
Other comparisons
