Comparison

Circle Calculator vs Random Numerals

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

Head to head
About

Circle Calculator

Instantly calculate all circle measurements from any single known value. Features include ring, arc, and sector calculations with detailed formulas and customizable input options. Offers a formula library and calculation history.

Highlights
  • Instant calculation of all circle measurements
  • Ring (annulus) area and circumference
  • Arc, sector, and chord calculations
  • Detailed formulas with worked examples
  • Customizable input for pi and decimal places
  • Formula library and calculation history
Features
Read full description

Know one measurement of a circle? Get all the others instantly. Type the radius, diameter, circumference or area โ€“ whichever you have โ€“ and Circle Calculator fills in the other three and writes every value right on the drawing. RING (ANNULUS) Enter the outer circle and the hole to get the ring area and ring width, plus both circumferences and the hole area. Ideal for pipes, washers, gaskets and round frames. ARCS, SECTORS & CHORDS Enter a radius and an angle, or a radius and an arc length, to get the arc length, chord and central angle. With Pro, also get the rise (sagitta), sector area, segment area and perimeter โ€“ and find the radius of any curve from its width and height (chord + rise), ideal for arches, curved walls and bends. SEE HOW IT'S SOLVED Every result comes with its formula and your numbers plugged in, for example C = 2ฯ€r = 2 ร— ฯ€ ร— 5 = 31.4159. TYPE IT YOUR WAY Enter ฯ€ and โˆš right in the field (3ฯ€, 5โˆš3), use 3.14, 3.1416, full-precision ฯ€ or your own value, and show 0 to 10 decimal places. Decimal comma or point both work. DRAWING OR CLASSIC Values sit directly on the circle in the Drawing layout. Prefer a list? Switch to Classic in Settings. FORMULA LIBRARY & HISTORY A searchable reference of circle, ring, arc and sector formulas with worked examples, and a history of your calculations to reopen any time (free keeps your last 5). EVERYWHERE YOU WORK iPhone, iPad and Mac, portrait or landscape, light or dark mode โ€“ in English, German, Japanese, Turkish, Spanish, French, Italian and Russian. On iPad and Mac: a sidebar, a full-height drawing and keyboard shortcuts. CIRCLE CALCULATOR PRO โ€ข No ads โ€ข Every step of every solution โ€ข Rise, sector area, segment area and the Chord + Rise tool โ€ข Unlimited history and Copy All The circle, ring and arc calculators are free to use. Pro options and prices are shown in the app. Terms of Use: https://monsware.com/circle-calculator-terms Privacy Policy: https://monsware.com/circle-calculator-privacy

About

Random Numerals

Features
Read full description

Embark on an exciting journey through the ancient world of Roman numerals with Random Numerals! Dive into an engaging mobile app designed to make learning fun and interactive. Whether you're a student brushing up on your math skills or just curious about ancient numbering systems, Roman Numeral Master has something for everyone. Explore a variety of mini-games carefully crafted to teach you the ins and outs of Roman numerals. From simple conversions to challenging puzzles, each game offers a unique learning experience. Each mini-game has various settings to modify to make it easier or harder. [ Random Numbers ] This page will show you a set of Random Numerals, you can configure how many you want to show using the slider, and also the minimum and maximum number it will pick from. You can then try and figure out each number, there is a show button that will show the value it corresponds to. [ Addition ] The Addition mini-game will pick 2 numbers and show them in Roman Numerals you then have to try and work out what they add up to, you do this by clicking on the answer box and type the symbols in from left to right. If you cannot work it out you can press the help button to show you. [ Single Number ] This mini-game will allow you to either be shown a Number or a Roman Numeral, you then have to wok out what the opposite is, i.e. if you are shown a Number you then have to work out the Roman Numeral. To do this you are given a mini keyboard and you type it in from left to right. You can alter the minimum and maximum number to make it easier or harder. [ Information ] This page will give you a basic understanding of how to calculate Random Numerals from numbers, it shows you what each symbol means. It also has a few basic examples on the page as well. Will scale to fit any size screen, it will work across all phones and tablets. If there on any issues with the app on your device please upgrade to the latest version or let the developer know.

Screenshots

Circle Calculator4 screens
Random Numerals4 screens

Verdict

The call

The clearest difference is in-app purchases: Random Numerals at none against Circle Calculator's 5. Random Numerals also leads on iOS requirement (15.0 vs 17.0). Circle Calculator's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Circle Calculator sells 5 in-app purchases, starting at $1.99 per 7 days. Random Numerals asks for nothing beyond the download.

UpkeepUpdate frequency

Circle Calculator ships an update every 2 months, Random Numerals monthly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard3 real differences ยท 5 level
Circle Calculator versus Random Numerals: the parameters behind the verdict, then further details
ParameterCircle CalculatorRandom Numerals
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 2 monthsMonthly โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
MonetizationFreemiumโ€”
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size22 MB99 MB
Age rating4+4+
DeveloperMuhammed Samil DEMIRWayne Perry

In-app purchases

5 purchases

Circle Calculator

Subscriptions3
  • Weekly Premium3 Days trial$1.997 Days
  • Monthly Premium3 Days trial$4.991 Month
  • Annual Premium7 Days trial$24.991 Year
One-time2
  • Pro Lifetime$29.99
  • Pro Lifetime$49.99
None

Random Numerals

No in-app purchases

Questions

Is Circle Calculator free?
Circle Calculator is free to download, with in-app purchases available.
Is Random Numerals free?
Random Numerals is free to download, with no in-app purchases.
Do Circle Calculator or Random Numerals have ads?
Random Numerals shows ads; Circle Calculator does not.
Which is updated more often, Circle Calculator or Random Numerals?
Circle Calculator ships an update every 2 months, and Random Numerals monthly. Most recently, Circle Calculator was updated on November 3, 2026 and Random Numerals on November 7, 2026.

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