# Arc+ vs Multi

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.

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.

## The numbers

| Metric | Arc+ | Multi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (113 ratings)](https://appshunter.io/ios/app/arc-plus/id1464058503/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/multi-metal-weight-estimator/id6449792621/reviews)** |
| Number of ratings | **113** | 3 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 10 MB |
| Requires iOS | **15.6** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Saad](https://appshunter.io/developer/1291109619) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### Arc+

[App page](https://appshunter.io/ios/app/arc-plus/id1464058503)

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.

**Highlights:** Calculate Radius, Length, Width, Height, Tangent, Input two known values to find others, Measurement units converter, Save results to favorites, Share calculations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Blocker | $4.99 | one-time |


### Multi

[App page](https://appshunter.io/ios/app/multi-metal-weight-estimator/id6449792621)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version monthly | $0.99 | per month |
| Full version / year | $3.99 | per year |
| Remove ADS | $6.99 | one-time |


## Frequently asked questions

### Is Arc+ free?

Arc+ is free to download, with in-app purchases available.

### Is Multi free?

Multi is free to download, with in-app purchases available.

### Which has better reviews, Arc+ or Multi?

Multi is rated higher. Arc+ averages 4.6 out of 5 from 113 ratings, while Multi averages 5.0 from 3 ratings.

### Do Arc+ or Multi have ads?

Neither Arc+ nor Multi shows ads.

### Which is updated more often, Arc+ or Multi?

Arc+ ships an update every 4 months, and Multi every 2 months. Most recently, Arc+ was updated on September 22, 2026 and Multi on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*