Comparison

Flat Metal Patterns vs Circle & Diameter Calculator

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

Head to head
About

Flat Metal Patterns

This app simplifies metal pattern creation with precise mathematical calculations, saving time and reducing errors compared to manual methods. It offers various pattern types, unit conversions, and smart calculation features for both experienced professionals and beginners.

Highlights
  • Automated pattern calculation
  • 20+ different pattern types
  • Diameter-Circumference conversion
  • Pipe and insulation reference tables
  • Smart calculator for fractions/decimals
  • Scale feature for large patterns
Read full description

Flat Metal Patterns is a metal pattern calculation program that helps us save time making the pattern and avoids possible errors that we may have when drawing the pattern by hand. You can also find products, tools and accessories online for the branch of industrial insulation. This application is aimed at experts, inexperienced and beginners; within the application you can find video tutorials that will guide you through the process of how to use the calculated pattern. For people who are experienced in tracing a pattern by hand, it will help them to avoid mistakes, calculate the pattern in seconds, and thus save time. The pattern calculation program is made based on mathematical calculations and converting those calculations into the pattern that we are used to work with. Inside you can find up to 20 different patterns, as well as Diameter - Circumference calculation, Pipe - Insulation reference tables and a length units calculator. Circumference-Diameter - The application works mainly with circumference values. Additionally, the application accepts diameter values that are converted to circumference. Pipe size - If you have the exact data of a pipe, the application has the ability to determine the exact circumference of the pipe. Smart calculator - Extremely important for specific operations on known fractions and decimals. This means that the calculator accepts the fractions of a conventional tape measure, and returns the results in the same way. Scale - An extremely important feature of the application that makes it easy for us to manufacture large-size patterns in parts. Terms of use: https://flatmetalpatterns.com/terms-and-conditions/

About

Circle & Diameter Calculator

Instantly calculate a circle's diameter, radius, circumference, and area. This tool is perfect for students, DIYers, and anyone needing quick, accurate circular measurements. It features an intuitive interface with automatic result updates.

Highlights
  • Calculate radius, diameter, circumference, and area
  • Instant calculations with automatic result updates
  • Input any known value to find others
  • Accurate geometry formulas using Pi
  • Support for decimal numbers and international input
  • Simple and intuitive interface
Features
Read full description

# Circle Calculator: Diameter Calculate circle diameter, radius, circumference, and area instantly with a simple, accurate, and easy-to-use circle calculator. Whether you're working on geometry problems, studying mathematics, measuring circular objects, or performing everyday calculations, Circle Calculator: Diameter makes finding circle measurements quick and convenient. **ALL CIRCLE CALCULATIONS IN ONE APP** Enter any known circle measurement and instantly calculate the remaining values: - **Radius** – Calculate the radius of a circle from its diameter, circumference, or area. - **Diameter** – Find the diameter using the radius, circumference, or area. - **Circumference** – Calculate the distance around a circle using any known measurement. - **Area** – Find the area of a circle from its radius, diameter, or circumference. **KEY FEATURES** - Instant calculations between radius, diameter, circumference, and area. - Four interactive input fields with automatic result updates. - Enter any known value to calculate the other three measurements. - Accurate circle geometry formulas using Pi (π). - Support for decimal numbers and precise calculations. - International decimal input support, including periods, commas, and Arabic decimal separators. - Automatic number formatting based on your device's regional settings. - Simple, intuitive interface with clearly displayed results. - No complicated menus or unnecessary steps. **PERFECT FOR EVERYDAY CALCULATIONS** Circle Calculator: Diameter is a practical tool for: - Students learning circle geometry and mathematics. - Teachers explaining radius, diameter, area, and circumference. - DIY projects involving circular measurements. - Engineering and technical calculations. - Construction, design, and craft projects. - Anyone who needs a quick circle measurement calculator. **SIMPLE AND FAST** No need to remember multiple circle formulas or perform calculations manually. Enter a radius, diameter, circumference, or area, and the calculator automatically updates the remaining three values. Switch between measurements, compare results, and solve circle geometry problems in seconds. **YOUR EVERYDAY CIRCLE GEOMETRY TOOL** From basic math exercises to practical measurements, Circle Calculator: Diameter brings essential circle calculations together in one convenient app. Calculate radius, diameter, circumference, and area anytime with a fast and straightforward calculator.

Screenshots

Flat Metal Patterns4 screens
Circle & Diameter Calculator4 screens

Verdict

The call

The clearest difference is rating: Circle & Diameter Calculator at 5.0 against Flat Metal Patterns's 4.4. Circle & Diameter Calculator also leads on in-app purchases (none vs 3) and review sentiment (100% vs 83%). Flat Metal Patterns's advantage is update cadence (every 5 weeks vs every 20 months) and ratings volume (27 vs 1). 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. Flat Metal Patterns sells 3 in-app purchases, starting at $7.99 per month. Circle & Diameter Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Circle & Diameter Calculator holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Flat Metal Patterns has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Flat Metal Patterns's written reviews are positive against 100% of Circle & Diameter Calculator's.

UpkeepUpdate frequency

Flat Metal Patterns ships an update every 5 weeks, Circle & Diameter Calculator every 20 months. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

Scorecard7 real differences · 3 level
Flat Metal Patterns versus Circle & Diameter Calculator: the parameters behind the verdict, then further details
ParameterFlat Metal PatternsCircle & Diameter Calculator
PriceFreeFree
Rating4.4 (27 ratings)5.0 (1 ratings) — better
Positive reviews83.3% of reviews100.0% of reviews — better
Number of ratings27 — better1
Update frequencyEvery 5 weeks — betterEvery 20 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15
Further details — not scored
Size135 MB10 MB
Age rating4+4+
DeveloperIgnacio Renteria-MolinaKrzysztof Gwiazda

Customer experience

Flat Metal Patterns

All ratings25 ratings
Positive88.0%
Neutral0.0%
Negative12.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Circle & Diameter Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Flat Metal Patterns

Subscriptions3
  • One month subscription$7.991 Month
  • 3 months subscription$19.993 Months
  • 6 month subscription$38.996 Months
None

Circle & Diameter Calculator

No in-app purchases

Questions

Is Flat Metal Patterns free?
Flat Metal Patterns is free to download, with in-app purchases available.
Is Circle & Diameter Calculator free?
Circle & Diameter Calculator is free to download, with no in-app purchases.
Which has better reviews, Flat Metal Patterns or Circle & Diameter Calculator?
Circle & Diameter Calculator is rated higher. Flat Metal Patterns averages 4.4 out of 5 from 27 ratings, while Circle & Diameter Calculator averages 5.0 from 1 ratings.
Do Flat Metal Patterns or Circle & Diameter Calculator have ads?
Neither Flat Metal Patterns nor Circle & Diameter Calculator shows ads.
Which is updated more often, Flat Metal Patterns or Circle & Diameter Calculator?
Flat Metal Patterns ships an update every 5 weeks, and Circle & Diameter Calculator every 20 months. Most recently, Flat Metal Patterns was updated on November 3, 2026 and Circle & Diameter Calculator on November 12, 2026.

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