Stars Units Sizes Objects vs MapSize
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.
MapSize
Explore the true sizes of countries, overcoming the distortions of traditional map projections. Compare any two territories side-by-side, move them freely, and discover fascinating statistical data about their relative dimensions. An ideal educational resource for geography enthusiasts.
- Accurate size comparison
- Overcomes map projection distortion
- Compare any two territories
- Interactive territory movement
- Learn relative size statistics
- Educational geography tool
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Traditional maps use the Mercator projection due to the earth's spherical shape, which distorts the size of countries near the poles. Because of this, you may be surprised to see how big some countries really are in comparison to others! With this app you can compare any two territories, move them around, and learn interesting statistics about their relative sizes. This is an excellent educational tool for students and teachers interested in geography.
Screenshots
Verdict
The clearest difference is ads: MapSize at none against Stars Units Sizes Objects's shown. MapSize also leads on rating (4.5 vs 4.2) and update cadence (every 5 weeks vs every 4 months). Stars Units Sizes Objects's advantage is iOS requirement (11.0 vs 15.0). 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.
MapSize holds the better App Store score, 4.5 against 4.2. That said, the two scores are not equally well evidenced: MapSize has 32 ratings behind it against 5, so its average is the more settled of the two.
Stars Units Sizes Objects ships an update every 4 months, MapSize every 5 weeks. The most recent releases landed on September 7, 2026 and September 13, 2026 respectively.
| Parameter | Stars Units Sizes Objects | MapSize |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 4.5 (32 ratings) — better |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 5 | 32 — better |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 124 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Mudarmeen Munlin | Jason Horsley |
Customer experience
Stars Units Sizes Objects
MapSize
In-app purchases
Stars Units Sizes Objects
No in-app purchases
MapSize
No in-app purchases
Questions
Is Stars Units Sizes Objects free?
Is MapSize free?
Which has better reviews, Stars Units Sizes Objects or MapSize?
Do Stars Units Sizes Objects or MapSize have ads?
Which is updated more often, Stars Units Sizes Objects or MapSize?
Other comparisons
