CMB Maps vs Stars Units Sizes Objects
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CMB Maps
Explore detailed all-sky maps of cosmic microwave background radiation from the Big Bang. Compare different generations of fluctuations in high resolution and view galactic coordinates and microwave sources.
- 4K resolution CMB maps
- Compare multiple maps
- Zoom and scroll for details
- Sky reference map
- Educational demonstration tool
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Amazing cosmic microwave background all-sky maps on your iPhone and iPad! This app allows you to see and compare different generations of CMB fluctuations. It includes 4K resolution all-sky COBE/WMAP/Planck CMB maps and allows you to zoom in and scroll around for map details. You can choose to view a single map, or compare multiple maps by tilting your device. A sky reference map is also included to show the galactic coordinates, notable Milky Way components, and microwave point sources. Cosmic Microwave Background (CMB) is the afterglow radiation from the Big Bang. Its temperature is extremely uniform, but with tiny fluctuations as you will see in these maps. In 1992, COBE satellite made the first detection of the CMB fluctuations. The following WMAP and Planck mission were able to scan the sky at better and better resolution. The successes of these CMB observations have provided us great understanding of the Universe over the last decades. Check the Wikipedia page for more details: http://en.wikipedia.org/wiki/Cosmic_microwave_background This app is designed and made by Qingqing Mao at Vanderbilt University for the purposes of astronomy education and demonstration. The included CMB maps are generated by NASA and ESA. COBE, WMAP and sky reference image credits: NASA / WMAP Science Team. Planck image credits: ESA and the Planck Collaboration. Author's personal website: http://mqq.io Suggestions and feedback are very welcome. Please leave your review, or visit author's website for contact information.
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 ads: CMB Maps at none against Stars Units Sizes Objects's shown. CMB Maps also leads on monetization model (free vs ad-supported) and iOS requirement (6.0 vs 11.0). Stars Units Sizes Objects's advantage is rating (4.2 vs 4.0) and review sentiment (80% vs 67%). On price, ratings volume, 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 holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 14 and 5 respectively. Written reviews point the same way: 67% of CMB Maps's written reviews are positive against 80% of Stars Units Sizes Objects's.
| Parameter | CMB Maps | Stars Units Sizes Objects |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (14 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | 66.7% of reviews | 80.0% of reviews — better |
| Number of ratings | 14 — better | 5 |
| Update frequency | — | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 57 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Qingqing Mao | Mudarmeen Munlin |
Customer experience
CMB Maps
Stars Units Sizes Objects
In-app purchases
CMB Maps
No in-app purchases
Stars Units Sizes Objects
No in-app purchases
Questions
Is CMB Maps free?
Is Stars Units Sizes Objects free?
Which has better reviews, CMB Maps or Stars Units Sizes Objects?
Do CMB Maps or Stars Units Sizes Objects have ads?
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