Comparison

Celestia vs Scratch案例教程

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

Head to head
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/

About

Scratch案例教程

Learn visual programming with this comprehensive course designed for children and beginners. Create animations, games, and interactive stories using a drag-and-drop interface. Develop creativity and problem-solving skills through engaging coding activities.

Highlights
  • Visual programming for kids
  • Create animations and games
  • Drag-and-drop coding interface
  • Develop creativity
  • Enhance logical thinking
  • Interactive stories
Features
Read full description

这是一套相当于市面上价值几千上万元的少儿编程课程,此App和本教程是由林剑老师亲自开发录制的,林剑老师是一位资深软件设计师,泉州市“涌泉行动”人才,福建省职业教育“双师”型教师、福建省职业技能等级考评员(人工智能训练师),现担任福建省多所高校计算机,动漫专业教师.兼任泉州市多所小学、少年宫外聘教师。具有丰富的开发与教学经验。(This is a set of children's programming courses worth several thousand to tens of thousands of yuan on the market. This App and this tutorial were personally developed and recorded by Teacher Lin Jian. Teacher Lin Jian is a senior software designer and a talent of Quanzhou's "Yongquan Action". Currently, he serves as a teacher of computer and animation majors in many universities in Fujian Province. Concurrently serves as an external teacher in several primary schools and children's palaces in Quanzhou City. Has rich experience in development and teaching.) 什么是Scratch?(What is Scratch?) Scratch是一款专为青少年和初学者设计的图形化编程软件,它以简单易懂的方式引领孩子们进入编程世界,激发他们的创造力和逻辑思维。 孩子们可以通过拖拽、堆叠积木代码的方式,轻松地创建自己的动画、游戏和交互式故事。让编程不再是冰冷的代码,而是孩子们手中的魔法棒! (Scratch is a graphical programming software specifically designed for teenagers and beginners. It leads children into the world of programming in a simple and understandable way, stimulating their creativity and logical thinking. Children can easily create their own animations, games and interactive stories by dragging and stacking building block codes. Let programming no longer be cold code, but a magic wand in children's hands!) 现在就来下载Scratch案例教程,让孩子们在编程的世界中释放无限的想象力,让他们在快乐中学习,成长为具有创造力和解决问题能力的未来领袖! (Download the Scratch case tutorial right now and let children unleash their boundless imagination in the world of programming. Let them learn happily and grow into future leaders with creativity and problem-solving skills!) 一起加入我们的Scratch编程课程吧!(Join our Scratch programming course together!)

Screenshots

Celestia4 screens
Scratch案例教程4 screens

Verdict

The call

The clearest difference is review sentiment: Celestia at 78% against Scratch案例教程's 9%. Celestia also leads on rating (4.4 vs 3.0) and update cadence (every 2 weeks vs every 3 months). Scratch案例教程's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model 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 and Scratch案例教程 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Celestia holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Celestia has 324 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 78% of Celestia's written reviews are positive against 9% of Scratch案例教程's.

UpkeepUpdate frequency

Celestia ships an update every 2 weeks, Scratch案例教程 every 3 months. Both last shipped on September 25, 2026.

Scorecard5 real differences · 5 level
Celestia versus Scratch案例教程: the parameters behind the verdict, then further details
ParameterCelestiaScratch案例教程
PriceFreeFree
Rating4.4 (324 ratings) — better3.0 (2 ratings)
Positive reviews78.3% of reviews — better9.0% of reviews
Number of ratings324 — better2
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size545 MB139 MB
Age rating4+17+
Developer林峰 李剑 林

Customer experience

Celestia

All ratings324 ratings
Positive83.0%
Neutral4.3%
Negative12.7%
Written reviews249 reviews
Positive78.3%
Neutral5.6%
Negative16.1%

Scratch案例教程

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews67 reviews
Positive9.0%
Neutral1.5%
Negative89.6%

User reviews

Celestia

From 324 App Store ratings

What we love

  • ⭐ Realistic space simulation
  • 🌌 Ability to explore galaxies and star systems
  • 🔍 Detailed planet and moon textures
  • 📷 Great for taking screenshots
  • 🤖 Reminds users of Space Engine

Room to improve

  • 🐛 Occasional crashes and glitches
  • 🌌 Limited exploration beyond Milky Way and Andromeda
  • 🌍 Flat terrain on planets
  • 🔍 Lack of detail on some celestial objects
  • 🔒 Paywall for some features

Scratch案例教程

From 2 App Store ratings

What we love

  • 👍 Can be useful for learning coding
  • 👍 Some users find it educational
  • 👍 Works for those who understand Chinese
  • 👍 Tutorials are available (though in Chinese)

Room to improve

  • ❌ Primarily in Chinese
  • ❌ No English language option
  • ❌ Confusing for non-Chinese speakers
  • ❌ Not the official Scratch app
  • ❌ Difficult to navigate without understanding Chinese

Bugs and 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

Scratch案例教程

Reported bugs

4 issues
  • Cannot change language
  • App cannot be deleted
  • App is stuck on one language
  • Lost progress due to no save feature

Requested features

8 requests
  • Add English language support
  • Add Vietnamese language support
  • Make the app multicultural
  • Add a save feature
  • Allow users to create animations/code
Show 3 more
  • Improve navigation for non-Chinese speakers
  • Allow automatic language setting
  • Option to skip video tutorials

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
3 purchases

Scratch案例教程

One-time3
  • 解锁初级篇教程$1.99
  • 解锁高级教程$12.99
  • 解锁所有教程$14.99

Questions

Is Celestia free?
Celestia is free to download, with in-app purchases available.
Is Scratch案例教程 free?
Scratch案例教程 is free to download, with in-app purchases available.
Which has better reviews, Celestia or Scratch案例教程?
Celestia is rated higher. Celestia averages 4.4 out of 5 from 324 ratings, while Scratch案例教程 averages 3.0 from 2 ratings.
Do Celestia or Scratch案例教程 have ads?
Neither Celestia nor Scratch案例教程 shows ads.
Which is updated more often, Celestia or Scratch案例教程?
Celestia ships an update every 2 weeks, and Scratch案例教程 every 3 months. Most recently, Celestia was updated on September 25, 2026 and Scratch案例教程 on September 25, 2026.

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