# Flat Metal Patterns vs Diameter Finder

The clearest difference is rating: Diameter Finder at 5.0 against Flat Metal Patterns's 4.4. Diameter Finder 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 5 months) and ratings volume (27 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Flat Metal Patterns sells 3 in-app purchases, starting at $7.99 per month. Diameter Finder asks for nothing beyond the download.

Diameter Finder 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 Diameter Finder's.

Flat Metal Patterns ships an update every 5 weeks, Diameter Finder every 5 months. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Flat Metal Patterns | Diameter Finder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (27 ratings)](https://appshunter.io/ios/app/flat-metal-patterns/id1481867517/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diameter-finder-circle-calc/id6463205574/reviews)** |
| Number of ratings | **27** | 1 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | Freemium | **Free** |
| Size | 135 MB | 13 MB |
| Requires iOS | 13.0 | **12.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ignacio Renteria-Molina](https://appshunter.io/developer/1481867516) | [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383) |

## What reviewers say

### Flat Metal Patterns

[App page](https://appshunter.io/ios/app/flat-metal-patterns/id1481867517)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month subscription | $7.99 | per month |
| 3 months subscription | $19.99 | per 3 months |
| 6 month subscription | $38.99 | per 6 months |


### Diameter Finder

[App page](https://appshunter.io/ios/app/diameter-finder-circle-calc/id6463205574)

This utility app provides a straightforward way to calculate circle properties. Simply input one known value (radius, diameter, circumference, or area) to instantly get the results for the others. It's designed for quick and no-fuss calculations.

**Highlights:** Calculate radius, Calculate diameter, Calculate circumference, Calculate area, Input any single value, Quick results

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

**In-app purchases:** none


## Frequently asked questions

### Is Flat Metal Patterns free?

Flat Metal Patterns is free to download, with in-app purchases available.

### Is Diameter Finder free?

Diameter Finder is free to download, with no in-app purchases.

### Which has better reviews, Flat Metal Patterns or Diameter Finder?

Diameter Finder is rated higher. Flat Metal Patterns averages 4.4 out of 5 from 27 ratings, while Diameter Finder averages 5.0 from 1 ratings.

### Do Flat Metal Patterns or Diameter Finder have ads?

Neither Flat Metal Patterns nor Diameter Finder shows ads.

### Which is updated more often, Flat Metal Patterns or Diameter Finder?

Flat Metal Patterns ships an update every 5 weeks, and Diameter Finder every 5 months. Most recently, Flat Metal Patterns was updated on October 20, 2026 and Diameter Finder on October 6, 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.*