Comparison

Circle and Sphere Pro vs Space Gate

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

Head to head
About

Circle and Sphere Pro

This app calculates various geometric quantities for circles and spheres, including sectors and segments. It supports decimals and fractions, displays formulas and solutions step-by-step, and stores calculations in a history. Users can share their results.

Highlights
  • Calculates sphere and circle quantities
  • Supports sectors and segments
  • Shows formulas and step-by-step solutions
  • Handles decimals and fractions
  • Stores calculations in history
  • Allows sharing of results
Features
Read full description

This app calculates all quantities of a sphere (body of a sphere, circle, all parts of sector and segment). Therefore you must enter some variables (like the radius of a circle and the central angle). The algorithm searches the formulas of the missing quantities, shows them and calculates the results. Decimals and fractions are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared. [ Content ] - all important quantities for the circle and sphere calculation - formulas for all important quantities of a sphere, circle, sector and the segment - infographic to illustrate the topic - search bar to find the desired quantity - history function to save input - detailed solution - positive numbers, decimals and fractions are supported - no ads! [ Usage ] - there are several fields for entering the values ​​using a special keyboard - if values are missing, all fields are highlighted in orange - if values are oppositions (like "r = 1 and d = 3"), one affected field is highlighted in red - every value must be positive - maximum of alpha is 360° - beta must be less than 90° - if a value is no number, it is highlighted in red - the entries in the history can be deleted or sorted manually - if you select an entry in the history, it will be loaded automatically for the calculation - the entire history can be deleted by pressing a button - solutions can be shared

About

Space Gate

Explore the universe with interactive 3D and AR experiences of the solar system. Discover celestial bodies, engage with live astronomy news, and even interact with black holes. Tailored for learning and education.

Highlights
  • 3D and AR solar system exploration
  • Interactive black hole simulations
  • Live astronomy magazine
  • Educational celestial catalogs
  • Capture and save celestial snapshots
Features
Read full description

Explore the Universe with Space-Gate - An Interactive Celestial Journey Discover the Wonders of Space: Dive into an awe-inspiring journey across the cosmos with Space-Gate. Our app brings the mysteries of the universe to your fingertips, offering a unique blend of education and entertainment. Whether you're a curious child, a student with a thirst for knowledge, or an astronomy enthusiast, our app is your gateway to exploring the solar system and beyond in stunning detail. Engage with live astronomy magazine: Dive into the cosmos with our app's magazine feature—your portal to the latest astronomy news, riveting space exploration stories, and learning progress, all in one place. Stunning 3D and AR Experiences: Experience the solar system like never before! With breathtaking 3D and advanced AR technology, you can navigate through the orbits of planets, witness the dance of their moons, and marvel at the beauty of our universe in high resolution. Our app isn't just a visual treat; it's a journey that brings the galaxy to life. Interact with Black Holes: Ever wondered what it’s like to interact with a black hole? Our innovative feature lets you manipulate the fabric of space-time, offering an immersive and educational experience. Using latest technologies, witness how black holes bend time, space, and even light at the touch of your finger. Educational Catalogs & Snapshots: Explore our extensive catalogs filled with fascinating information about each celestial body. Capture and save breathtaking celestial scenes, perfect for wallpapers or sharing your space exploration with friends. Tailored for Learning: Perfect for educators and parents, our app is an invaluable tool for teaching. From young minds to advanced learners. The app offers premium features as subscription plans and in app purchases. Payment will be charged to your Apple ID Account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal 24 hours prior to the end of the current period, at the rate of your selected plan. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. During the free trial period, you can enjoy full access to all the app's features. If you decide to subscribe during the trial, any unused portion of the free trial period will be forfeited. For more information, please read terms of use: https://alpinebytes.ucraft.site/space-gate

Screenshots

Circle and Sphere Pro4 screens
Space Gate4 screens

Verdict

The call

The clearest difference is price: Circle and Sphere Pro at $2.99 against Space Gate's $12.99. Circle and Sphere Pro also leads on in-app purchases (none vs 3). Space Gate's advantage is update cadence (weekly vs monthly) and review sentiment (86% vs 67%). On rating, ads, device support and iOS requirement 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

Circle and Sphere Pro costs $2.99 and Space Gate $12.99 up front. Space Gate sells 3 in-app purchases, starting at $2.99 per month. Circle and Sphere Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Circle and Sphere Pro against 4.8 for Space Gate. That said, the two scores are not equally well evidenced: Space Gate has 202 ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 67% of Circle and Sphere Pro's written reviews are positive against 86% of Space Gate's.

UpkeepUpdate frequency

Circle and Sphere Pro ships an update monthly, Space Gate weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Circle and Sphere Pro versus Space Gate: the parameters behind the verdict, then further details
ParameterCircle and Sphere ProSpace Gate
Price$2.99 — better$12.99
Rating4.9 (7 ratings) — better4.8 (202 ratings)
Positive reviews66.7% of reviews85.8% of reviews — better
Number of ratings7202 — better
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size180 MB156 MB
Age rating4+4+
DeveloperGlindemann, Sennoun, Langer GbRAli Samaei

Customer experience

Circle and Sphere Pro

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Space Gate

All ratings200 ratings
Positive96.0%
Neutral1.0%
Negative3.0%
Written reviews134 reviews
Positive85.8%
Neutral3.0%
Negative11.2%

Bugs and requests

Circle and Sphere Pro

Not enough reviews yet to summarise bugs or requests.

Space Gate

Reported bugs

11 issues
  • Moon not tidally locked to Earth
  • Moon orbiting Earth in wrong direction
  • Planets orbiting sun in opposing/incorrect directions
  • Uranus moons glitched
  • Venus orbital speed faster than Mercury
Show 6 more
  • Navigation stuck on celestial objects (e.g., Phobos)
  • Unable to exit and return to main menu
  • In-app purchase restoration issues between devices
  • Moon rotates multiple times per orbit
  • Difficulty backing out of exploration mode
  • Mercury translation error in Turkish

Requested features

12 requests
  • Ability to set any planet as immobile center point
  • More free planets without paywall
  • Additional galaxies beyond solar system
  • Toggle for planet/moon/star name labels
  • Time-lapse function with variable speeds
Show 7 more
  • More interactive black hole visualization
  • Astrology-related content
  • Improved moon orbit accuracy
  • Correct planetary orbital directions
  • Per-app language settings independent of iOS settings
  • More detailed information and content
  • True realistic scale mode with disclaimer

In-app purchases

None

Circle and Sphere Pro

No in-app purchases

3 purchases

Space Gate

Subscriptions2
  • Monthly Subscription$2.991 Month
  • Annual Subscription3 Days trial$6.991 Year
One-time1
  • Lifetime Subscription$12.99

Questions

Is Circle and Sphere Pro free?
Circle and Sphere Pro costs $2.99, with no in-app purchases.
Is Space Gate free?
Space Gate costs $12.99, and also offers in-app purchases.
Which has better reviews, Circle and Sphere Pro or Space Gate?
Circle and Sphere Pro is rated higher. Circle and Sphere Pro averages 4.9 out of 5 from 7 ratings, while Space Gate averages 4.8 from 202 ratings.
Do Circle and Sphere Pro or Space Gate have ads?
Neither Circle and Sphere Pro nor Space Gate shows ads.
Which is updated more often, Circle and Sphere Pro or Space Gate?
Circle and Sphere Pro ships an update monthly, and Space Gate weekly. Most recently, Circle and Sphere Pro was updated on October 25, 2026 and Space Gate on October 24, 2026.

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