Comparison

CMB Maps vs Universal Numbers

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 4K resolution CMB maps
  • Compare multiple maps
  • Zoom and scroll for details
  • Sky reference map
  • Educational demonstration tool
Features
Read full description

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.

About

Universal Numbers

This app helps children and language learners understand numbers through visual representation and interactive exploration. It makes number concepts clear by showing place values, quantities, and the logic of large numbers. Practice counting in over 40 languages with pronunciation support.

Highlights
  • Visual number line exploration
  • Tap to hear number pronunciation
  • Zoom in/out for different counting increments
  • Search for specific numbers
  • Supports 40+ languages for counting practice
  • No ads or data collection
Features
Read full description

We believe numbers aren't hard — they just need to be seen the right way. That's why we built Universal Numbers: a simple visual tool that helps children and language learners truly understand numbers, not just recite them. When kids can see a number, hear it, and feel how it breaks apart, the concept clicks. FOR YOUNG LEARNERS: Most children memorize number sequences without ever grasping what they mean. Universal Numbers changes that by making the structure of numbers visible — place values in color, quantities at a glance, and the logic of big numbers made obvious. From 0 to 1,000,000, on a number line they can scroll and zoom themselves. No pressure. No wrong answers. Just numbers that finally make sense. FOR LANGUAGE LEARNERS: Counting in a new language is one of the last things that feels truly automatic. Practice numbers in English, Spanish, or French — or any of 40+ languages and dialects available — at whatever pace you choose. HOW IT WORKS: • Scroll the number line to explore • Tap any number to hear it pronounced • Zoom in or out to count by 5, 10, 100, or more • Search for any specific number instantly • Choose your language and Apple system voice RANGE: 0 to 1,000,000 LANGUAGES FOR PRACTICE: Explore how numbers are spelled, written, and pronounced in dozens of languages and dialects — without changing your device language. In some, even the numerals look different. Pronunciation plays wherever your device has a matching voice installed, and the language list keeps growing as Apple adds support. PRIVACY: No ads. No accounts. No data collection. STAY IN TOUCH: YouTube, TikTok, X: @GamifyItApps www.gamifyitapps.com/contact

Screenshots

CMB Maps2 screens
Universal Numbers4 screens

Verdict

The call

The clearest difference is rating: Universal Numbers at 4.9 against CMB Maps's 3.9. CMB Maps's advantage is iOS requirement (6.0 vs 16.6). On price, review sentiment, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Universal Numbers holds the better App Store score, 4.9 against 3.9. Both are backed by a comparable volume of ratings — 21 and 24 respectively. Written reviews split almost evenly too, at 67% and 67% positive.

Scorecard2 real differences · 8 level
CMB Maps versus Universal Numbers: the parameters behind the verdict, then further details
ParameterCMB MapsUniversal Numbers
PriceFreeFree
Rating3.9 (21 ratings)4.9 (24 ratings) — better
Positive reviews66.7% of reviews66.7% of reviews
Number of ratings2124 — better
Update frequency—Monthly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS6.0 — better16.6
Further details — not scored
Size57 MB3 MB
Age rating4+4+
DeveloperQingqing MaoGamifyIt

Customer experience

CMB Maps

All ratings14 ratings
Positive78.6%
Neutral0.0%
Negative21.4%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Universal Numbers

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

None

CMB Maps

No in-app purchases

None

Universal Numbers

No in-app purchases

Questions

Is CMB Maps free?
CMB Maps is free to download, with no in-app purchases.
Is Universal Numbers free?
Universal Numbers is free to download, with no in-app purchases.
Which has better reviews, CMB Maps or Universal Numbers?
Universal Numbers is rated higher. CMB Maps averages 3.9 out of 5 from 21 ratings, while Universal Numbers averages 4.9 from 24 ratings.
Do CMB Maps or Universal Numbers have ads?
Neither CMB Maps nor Universal Numbers shows ads.

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