# Proposal Writer 4 vs Metal

The clearest difference is update cadence: Metal at every 6 weeks against Proposal Writer 4's every 7 months. Metal also leads on ratings volume (3 vs 1) and iOS requirement (11.0 vs 18.0). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Proposal Writer 4 against 5.0 for Metal. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Proposal Writer 4 ships an update every 7 months, Metal every 6 weeks. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Proposal Writer 4 | Metal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/proposal-writer-4/id942538207/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/metal-era/id1482025821/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 3 MB | 22 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carlisle Construction Materials Incorporated](https://appshunter.io/developer/557896327) | [Metal-Era, Inc](https://appshunter.io/developer/1482025820) |

## What reviewers say

### Proposal Writer 4

[App page](https://appshunter.io/ios/app/proposal-writer-4/id942538207)

This app helps roofing professionals conduct rooftop inspections and generate professional reports for clients. It allows for detailed documentation of roof conditions, features, and necessary repairs, streamlining the proposal process.

**Highlights:** Generate rooftop inspection reports, Capture and import photos, Import satellite imagery for site maps, Document rooftop conditions and repairs, Access suggested solutions, Include cover letters and specifications

**Features:** macOS Compatibility

**In-app purchases:** none


### Metal

[App page](https://appshunter.io/ios/app/metal-era/id1482025821)

This app provides roofing professionals with essential tools and information for commercial roofing projects. It offers calculators to assist in project planning and selecting appropriate edge metal systems. Access expert knowledge from a leading manufacturer in the industry.

**Highlights:** Roofing project calculators, Edge metal system selection, Commercial roofing industry resource, Expert knowledge access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Proposal Writer 4 free?

Proposal Writer 4 is free to download, with no in-app purchases.

### Is Metal free?

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

### Which has better reviews, Proposal Writer 4 or Metal?

Proposal Writer 4 and Metal are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Proposal Writer 4 or Metal have ads?

Neither Proposal Writer 4 nor Metal shows ads.

### Which is updated more often, Proposal Writer 4 or Metal?

Proposal Writer 4 ships an update every 7 months, and Metal every 6 weeks. Most recently, Proposal Writer 4 was updated on October 6, 2026 and Metal on October 13, 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.*