Stars Units Sizes Objects vs AR World Explorer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
AR World Explorer
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AR World Explorer brings the world map to life on your table. Point your device at the map to discover countries, hear facts, and explore in 3D. FEATURES • Browse countries and regions with rich visuals • Country information and audio in multiple languages where available • AR experiences tied to your physical map product • Interactive globe and map-book style content • Quizzes and challenges to test what you’ve learned • Sign in to save progress and access online features REQUIREMENTS • Compatible map or product where required for full AR experiences • Internet connection for sign-in and online content PRIVACY & ACCOUNT • Optional sign-in with Apple or Google to access account features • See our privacy policy on the support website for details on data use SUPPORT Questions or issues? Visit our support page
Screenshots
Verdict
The clearest difference is ads: AR World Explorer at none against Stars Units Sizes Objects's shown. AR World Explorer also leads on update cadence (every 5 days vs every 4 months). Stars Units Sizes Objects's advantage is iOS requirement (11.0 vs 16.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Stars Units Sizes Objects ships an update every 4 months, AR World Explorer every 5 days. The most recent releases landed on September 22, 2026 and October 7, 2026 respectively.
| Parameter | Stars Units Sizes Objects | AR World Explorer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 4 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 124 MB | 540 MB |
| Age rating | 4+ | 4+ |
| Developer | Mudarmeen Munlin | Hasnain Poonja |
In-app purchases
Stars Units Sizes Objects
No in-app purchases
AR World Explorer
No in-app purchases
Questions
Is Stars Units Sizes Objects free?
Is AR World Explorer free?
Do Stars Units Sizes Objects or AR World Explorer have ads?
Which is updated more often, Stars Units Sizes Objects or AR World Explorer?
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