Comparison

The Fourth Dimension vs SPACE by THIX

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

Head to head
About

The Fourth Dimension

Explore a complex mathematical concept through an interactive 3D experience. This app uses a unique touch interface to help you visualize and understand the fourth dimension in an engaging and accessible way.

Highlights
  • Interactive 3D touch interface
  • Explains the fourth dimension
  • Accessible language for all
  • 30-page interactive book
  • Visual and hands-on learning
Read full description

The Fourth Dimension is a 30-page interactive book that explains a single mathematical idea in language that anyone can understand. Instead of static images or canned videos, this app employs a unique 3D touch interface that lets you literally grasp the concept of the fourth dimension with your own hands. “Not only can you blow your own mind over and over again, you can also enjoy watching your friends’ minds being blown in front of you.” — Cult of Mac “One of the coolest apps I've ever used... The Fourth Dimension is to boring learning apps what Carl Sagan's Cosmos was to staid science documentaries.” — BuzzFeed “The app is very cool, and it's unlike pretty much anything we've seen in the App Store.” — The Verge “This is one of my most favorite iOS apps ever.” — George Musser, contributing editor for Scientific American and author of The Complete Idiot's Guide to String Theory (App Store user reviews follow.) “Blew my mind. I generally don't use 'learning' apps as they're mostly gimmicks. This one, though, truly made me think. I hope this developer comes out with more outstanding apps such as this one. Bravo!” — Iceitic “Astounding. That some people care passionately enough about tesseracts to go create a fantastic app for others to understand them is incredible. The app is extremely well designed, wittily written, and executed with love. That alone is worth buying it, besides the fact that I learned what the hell a tesseract was.” — Duncan MacMichael “Fantastic! This is what someone really smart, and who really knows how to teach well, can do with a tablet. And the authors are funny, too, which is a neat bonus.” — DNY “Fantastic app. I work at a leading UK university. If only all our material was this well written and presented. Definitely worth buying and then spending a bit of time with over a day or two to get your head around the fourth dimension. Great app!” — JulesFM “Great job! This app does the best job explaining the 4th dimension. Why learn it in some boring classroom when here you can have an interactive and visual explanation.” — Aco Strklalj Over 250,000 people have blown their minds with this app.

About

SPACE by THIX

Create and explore your own universe with realistic physics. Build celestial bodies, experiment with natural laws, and journey through the cosmos you design. Learn astronomy and astrophysics through interactive play.

Highlights
  • Create celestial bodies (planets, stars, black holes)
  • Experiment with gravity and natural laws
  • Simulate supernovae and planetary collisions
  • Interactive real-time physics
  • Explore created universes
  • Learn astronomy and astrophysics
Features
Read full description

* Best of 2016 – Apple * Create your own universe. Play with the law of nature. Visit the outer worlds. Build asteroids, nebula, comets, planets, moons, stars, pulsars and even blackholes at your fingertips. Experiment with gravity, supernova, planetary collision and so forth. Zoom in to ride comets. Zoom out to gaze at the galaxy of stars. S C I E N C E D R I V E N Learn Astronomy and Astrophysics for fun and creativity. All celestial bodies you create can move and interact in real-time and in accordance with the Newtonian astrophysics laws. C E L E S T I A L T O U C H Move planets with your fingers. Swipe to shoot a comet. Play with your own universe in an astronomical scale. SPACE puts gigantic celestial bodies under your fingertips. C O S M I C V O Y A G E Meditate in the indescribable beauty of space that you create, anywhere and anytime. Hold your device to view the universe in from any angle. Visit us: thix.co
 Like us: facebook.com/thixlab 
Follow us: twitter.com/thixlab Comments or Questions: support@thixlab.com

Screenshots

The Fourth Dimension4 screens
SPACE by THIX4 screens

Verdict

The call

The clearest difference is review sentiment: The Fourth Dimension at 94% against SPACE by THIX's 50%. The Fourth Dimension also leads on rating (4.8 vs 3.7) and ratings volume (1.9K vs 169). SPACE by THIX's advantage is update cadence (every 2 months vs every 4 months) and iOS requirement (10.0 vs 12.0). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

The Fourth Dimension costs $2.99 and SPACE by THIX $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

The Fourth Dimension holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: The Fourth Dimension has 1.9K ratings behind it against 169, so its average is the more settled of the two. Written reviews point the same way: 94% of The Fourth Dimension's written reviews are positive against 50% of SPACE by THIX's.

UpkeepUpdate frequency

The Fourth Dimension ships an update every 4 months, SPACE by THIX every 2 months. Both last shipped on September 23, 2026.

Scorecard6 real differences · 4 level
The Fourth Dimension versus SPACE by THIX: the parameters behind the verdict, then further details
ParameterThe Fourth DimensionSPACE by THIX
Price$2.99$2.99
Rating4.8 (1.9K ratings) — better3.7 (169 ratings)
Positive reviews94.2% of reviews — better50.5% of reviews
Number of ratings1.9K — better169
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.010.0 — better
Further details — not scored
Size5 MB106 MB
Age rating4+4+
DeveloperLunar Skydiving LLCTHIX LLC

Customer experience

The Fourth Dimension

All ratings1,940 ratings
Positive97.0%
Neutral1.4%
Negative1.5%
Written reviews312 reviews
Positive94.2%
Neutral1.9%
Negative3.8%

SPACE by THIX

All ratings169 ratings
Positive66.3%
Neutral13.0%
Negative20.7%
Written reviews212 reviews
Positive50.5%
Neutral17.9%
Negative31.6%

Bugs and requests

The Fourth Dimension

Not enough reviews yet to summarise bugs or requests.

SPACE by THIX

Reported bugs

4 issues
  • Planets and objects behaving erratically or disappearing
  • Frequent crashes or freezes, especially with many objects
  • Inconsistent or unresponsive touch controls
  • Incorrect physics or behavior of certain celestial bodies

Requested features

5 requests
  • Add ability to customize and edit planets
  • Implement time controls to speed up/slow down simulation
  • Provide more celestial objects and phenomena to interact with
  • Improve performance and reduce lag on complex scenes
  • Include a tutorial or in-game guidance for new players

In-app purchases

None

The Fourth Dimension

No in-app purchases

None

SPACE by THIX

No in-app purchases

Questions

Is The Fourth Dimension free?
The Fourth Dimension costs $2.99, with no in-app purchases.
Is SPACE by THIX free?
SPACE by THIX costs $2.99, with no in-app purchases.
Which has better reviews, The Fourth Dimension or SPACE by THIX?
The Fourth Dimension is rated higher. The Fourth Dimension averages 4.8 out of 5 from 1.9K ratings, while SPACE by THIX averages 3.7 from 169 ratings.
Do The Fourth Dimension or SPACE by THIX have ads?
Neither The Fourth Dimension nor SPACE by THIX shows ads.
Which is updated more often, The Fourth Dimension or SPACE by THIX?
The Fourth Dimension ships an update every 4 months, and SPACE by THIX every 2 months. Most recently, The Fourth Dimension was updated on September 23, 2026 and SPACE by THIX on September 23, 2026.

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