Circle and Sphere Pro

Circle and Sphere Pro

Calculates all quantities

7 ratings
3 reviews
$2.99

Details

  • Released
  • Updated
  • April 23, 2021
  • July 17, 2026

Features

Circle and Sphere Pro screenshot #1 for iPhone
Circle and Sphere Pro screenshot #2 for iPhone
Circle and Sphere Pro screenshot #3 for iPhone
Circle and Sphere Pro screenshot #4 for iPhone
Circle and Sphere Pro screenshot #5 for iPhone
Circle and Sphere Pro screenshot #6 for iPhone
Circle and Sphere Pro screenshot #7 for iPhone
iphone
ipad
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About

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.

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
Show original description

What's New in Circle and Sphere Pro

2.2.1

July 17, 2026

Maintenance update. Improving performance.

User reviews

Great Developer & app

Works flawlessly, handy tool
Great Developer support
PS- 3rd party Google data mines everything

Response from developer

Hello, that is a good point. Let me explain the usage of data. It is correct that we get some data, but only for monitoring. "Location" is only about the country. Means - we see "100 users from US; 40 from France; 20 in Germany; etc.". We provide our apps in 11 different languages. The country data help us to see where the app is used and if some problems occur that might have something to do with language localization. Maybe that "device ID"-thing might be another scary factor. But this only shows the difference if the app was launched the first time or if users come back. This is only a pale numbers that helps us to understand if people just downloading, open once and say "yeah, remove that s*$t" or if there is a real use. Some information help us to understand that teachers and parents are using these apps too. At first we designed the apps only for pupils. But the data are only some simple numbers too like "40% are in age of 25-35; 20% in 36-45; etc". The rest are crashes and some things to check if the app works properly. "Uncontrolled 3rd parties" - we use Firebase for this. In the end it is Google who is managing this, but they say they only monitor the data. That is the only information that we get. From our point of view we only use data to improve the service. But we use a 3rd party that is connected to Google. It is up to you if you trust Google. I hope I was able to provide some clarity. Kind regards Ps. Let me tell you that I nearly get the same information from my apple developer console. So yeah ... everything the same. ---- Thank you very much for updating your review. 🙏

TOO VAGUE ON PRIVACY -ESP 3rd PARTY

Don’t know about app performance as NOT agreeing to collection of data esp location , some to uncontrolled 3rd parties, just to perform simple math equations

Response from developer

Hello, that is a good point. Let me explain the usage of data. It is correct that we get some data, but only for monitoring. "Location" is only about the country. Means - we see "100 users from US; 40 from France; 20 in Germany; etc.". We provide our apps in 11 different languages. The country data help us to see where the app is used and if some problems occur that might have something to do with language localization. Maybe that "device ID"-thing might be another scary factor. But this only shows the difference if the app was launched the first time or if users come back. This is only a pale numbers that helps us to understand if people just downloading, open once and say "yeah, remove that s*$t" or if there is a real use. Some information help us to understand that teachers and parents are using these apps too. At first we designed the apps only for pupils. But the data are only some simple numbers too like "40% are in age of 25-35; 20% in 36-45; etc". The rest are crashes and some things to check if the app works properly. "Uncontrolled 3rd parties" - we use Firebase for this. In the end it is Google who is managing this, but they say they only monitor the data. That is the only information that we get. From our point of view we only use data to improve the service. But we use a 3rd party that is connected to Google. It is up to you if you trust Google. I hope I was able to provide some clarity. Kind regards Ps. Let me tell you that I nearly get the same information from my apple developer console. So yeah ... everything the same.

Change the units?

This app is great. The only problem I have is it’s in meters. How can I make it feet or another unit? This is pointless if all we get is meters.

Response from developer

Hello Batman2287, thanks a lot for your positive feedback! At the moment there is no option to change the units. But I will note it and check what I can do for the next updates. Kind regards

Developer apps

FAQ

What geometric quantities can Circle and Sphere Pro calculate?

Circle and Sphere Pro calculates all important quantities for circles and spheres, including those for sectors and segments. It provides formulas for these quantities and displays detailed, step-by-step solutions.

Does Circle and Sphere Pro support fractions and decimals?

Yes, Circle and Sphere Pro supports both decimal and fractional inputs for calculations. It also handles positive numbers and has specific limits for angles alpha (up to 360°) and beta (less than 90°).

How does Circle and Sphere Pro help users track their calculations?

The app features a history function that saves all input and calculations. Users can delete or sort entries manually, and selecting a past entry automatically loads it for further calculations or sharing.

What happens if I enter incorrect or conflicting values in Circle and Sphere Pro?

If values are missing, the corresponding fields are highlighted in orange. If values are contradictory (e.g., 'r = 1 and d = 3'), one affected field will be highlighted in red. Non-numeric entries are also highlighted in red.

Can I share my calculation results from Circle and Sphere Pro?

Yes, the final solutions calculated by Circle and Sphere Pro can be shared. This feature allows users to easily distribute their geometric findings.

Is Circle and Sphere Pro available on multiple devices?

Circle and Sphere Pro is available for iPhone, iPod, and iPad devices. It is designed to run on iOS platforms.

How often is Circle and Sphere Pro updated?

The latest version of Circle and Sphere Pro is 2.1.7, last updated on March 24, 2026. This indicates a recent update, suggesting ongoing development and support.

Does Circle and Sphere Pro have ads?

No, Circle and Sphere Pro is ad-free. The app explicitly states 'no ads!' in its description, ensuring an uninterrupted user experience.