Comparison

Math Function Viewer vs Celestia

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

Head to head
About

Math Function Viewer

Features
Read full description

This app shows basic mathematical functions graphically. Features: - add more than one functions. - pan the view - zoom the view - value picker (only on iPad version) This app is guaranteed to be free of advertising!

About

Celestia

Explore the universe in real-time 3D. Visit planets, moons, star clusters, and galaxies, viewing them from any point in space and time. Customize your experience with expandable content and detailed simulations.

Highlights
  • Real-time 3D space visualization
  • Explore planets, moons, stars, galaxies
  • Accurate solar system object positions
  • Interactive planetarium mode
  • Expandable content with add-ons
  • Customizable celestial databases
Features
Read full description

Celestia — real-time 3D visualization of space 3D Space Simulator | Celestia lets you explore our universe in three dimensions. Celestia simulates many different types of celestial objects. From planets and moons to star clusters and galaxies, you can visit every object in the expandable database and view it from any point in space and time. The position and movement of solar system objects is calculated accurately in real time at any rate desired. Interactive Planetarium | Celestia serves as a planetarium – for an observer on any celestial object. You can easily navigate to any world and land on its surface. When used as a planetarium, Celestia shows accurate positions of solar system objects in the sky. You can switch labels and other supporting features on and off with hotkeys, or zoom in and out on an object of interest, for example Jupiter’s system of moons. Expandable Content | Customize Celestia according to your needs. Celestia’s catalogues can be easily expanded. There are many different add-ons available containing new objects like comets or stars, high-resolution textures of Earth and other well mapped solar system bodies, as well as 3D models for asteroids and spacecraft on precise trajectories. Even fictional objects from well-known sci-fi franchises can be found. EULA(End User License Agreement): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Math Function Viewer4 screens
Celestia4 screens

Verdict

The call

The clearest difference is in-app purchases: Math Function Viewer at none against Celestia's 4. Math Function Viewer also leads on iOS requirement (8.0 vs 15.0). Celestia's advantage is update cadence (every 2 weeks vs every 6 months). On price, ads 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

Both are free to download. Celestia sells 4 in-app purchases, starting at $0.99 per 7 days. Math Function Viewer asks for nothing beyond the download.

UpkeepUpdate frequency

Math Function Viewer ships an update every 6 months, Celestia every 2 weeks. The most recent releases landed on September 14, 2026 and September 28, 2026 respectively.

Scorecard3 real differences · 7 level
Math Function Viewer versus Celestia: the parameters behind the verdict, then further details
ParameterMath Function ViewerCelestia
PriceFreeFree
Rating—4.4 (324 ratings) — better
Positive reviews—78.3% of reviews
Number of ratings—324 — better
Update frequencyEvery 6 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS8.0 — better15.0
Further details — not scored
Size4 MB545 MB
Age rating4+4+
DeveloperGuido Bernuetz林峰 李

Bugs and requests

Math Function Viewer

Not enough reviews yet to summarise bugs or requests.

Celestia

Reported bugs

3 issues
  • Milky Way and other galaxy textures not loading properly
  • Crashes when using certain add-ons
  • Issues with planet and moon orbits not being accurate

Requested features

5 requests
  • Add more exoplanets and distant star systems
  • Implement terrain generation for planets
  • Expand to include more galaxies and the overall universe structure
  • Add support for black holes, pulsars, and other exotic objects
  • Improve controls and camera movement

In-app purchases

None

Math Function Viewer

No in-app purchases

4 purchases

Celestia

Subscriptions3
  • Celestia PLUS (Weekly)7 Days trial$0.997 Days
  • Celestia PLUS (Monthly)$1.991 Month
  • Celestia PLUS (Yearly)$19.991 Year
One-time1
  • Celestia PLUS (Lifetime)$79.99

Questions

Is Math Function Viewer free?
Math Function Viewer is free to download, with no in-app purchases.
Is Celestia free?
Celestia is free to download, with in-app purchases available.
Do Math Function Viewer or Celestia have ads?
Neither Math Function Viewer nor Celestia shows ads.
Which is updated more often, Math Function Viewer or Celestia?
Math Function Viewer ships an update every 6 months, and Celestia every 2 weeks. Most recently, Math Function Viewer was updated on September 14, 2026 and Celestia on September 28, 2026.

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