Arc+ vs Multi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arc+
This utility app helps users calculate various dimensions of circular arcs, including radius, length, width, and height. It offers a simple interface where users input two known values to derive the rest. Additional features include a unit converter, result saving, and sharing capabilities.
- Calculate Radius, Length, Width, Height, Tangent
- Input two known values to find others
- Measurement units converter
- Save results to favorites
- Share calculations
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Arc+ The Complete Circular Arc Calculator Calculates the Radius, Length, Width (chord), Height, Tangent How it works: Select two known values and type it in text boxes and click on ( = ) to get the required values. Features: Measurement units converter Save your results to a favorite list Share your results with others
Multi
Calculate the weight of various metal alloys and shapes with a user-friendly interface. Supports multiple units for length and weight, and includes a comprehensive metal library. Offers additional tools like material comparison and hardness charts.
- Weight calculation for multiple metal alloys
- Supports various geometric shapes
- Flexible unit conversion for length and weight
- Comprehensive metal library
- Material comparison tools
- Temper charts and hardness data
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Introducing the Universal Metal Weight Calculator, your one-stop solution for calculating the weight of various metal alloys including aluminum, brass, copper, iron, gold, and more. With an easy-to-use interface and the ability to convert between multiple units, our app now does more than ever before. Calculate weight for a variety of shapes: Whether you're working with a rectangular prism, ring prism, hexagonal shape, or any other complex geometry, our app provides accurate weight calculations. Wide variety of metals: Now featuring more than just aluminum, we have expanded to include a variety of metals such as brass, copper, iron, gold, nickel, platinum, and many others. Our comprehensive metal library helps you calculate weight with ease, regardless of the alloy you're using. Versatile unit conversion: We understand the importance of flexibility in units while making calculations. Therefore, our app now supports a range of length units including millimeters, centimeters, meters, inches, feet, and yards for defining sizes. Moreover, weight units such as micrograms, milligrams, grams, kilograms, and various imperial units can be chosen for your final weight result. User-friendly interface: Our app maintains a clean and intuitive interface to ensure user-friendliness, allowing for quick and efficient calculations. Accurate calculations: Built with a sophisticated algorithm, our app ensures the most accurate weight calculations for your peace of mind. Download the Universal Metal Weight Calculator today and streamline your metal weight calculations. For professionals working with different metal alloys, our app is an indispensable tool to increase efficiency and accuracy. We added: Materials Comparison, Temper Charts, Hardness To Tensile, Thickness Table, Gauge Table, Fraction Conversion, Melting Points Added: Structural Strength Surface Area Calculator Metal Compatibility Chart Machining Parameters Vibration Damping Properties Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Arc+ at 50% against Multi's 0%. Arc+ also leads on monetization model (free vs free with in-app purchases) and ratings volume (113 vs 3). Multi's advantage is rating (5.0 vs 4.6) and update cadence (every 2 months vs every 4 months). On price, ads, in-app purchases 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
Both are free to download. Arc+ sells 1 one-off in-app purchase and Multi sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Multi holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Arc+ has 113 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 50% of Arc+'s written reviews are positive against 0% of Multi's, so the app with the better star average is not the one people write more warmly about.
Arc+ ships an update every 4 months, Multi every 2 months. The most recent releases landed on September 22, 2026 and October 8, 2026 respectively.
| Parameter | Arc+ | Multi |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (113 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 113 — better | 3 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.2 |
| Further details — not scored | ||
| Size | 4 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Mohamed Saad | Vladislav Zhirnov |
Customer experience
Arc+
Multi
In-app purchases
Arc+
- Ad Blocker$4.99
Multi
- Full version monthly$0.991 Month
- Full version / year$3.991 Year
- Remove ADS$6.99
Questions
Is Arc+ free?
Is Multi free?
Which has better reviews, Arc+ or Multi?
Do Arc+ or Multi have ads?
Which is updated more often, Arc+ or Multi?
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