# RoofPair vs Donan Engineering

The clearest difference is review sentiment: Donan Engineering at 100% against RoofPair's 50%. Donan Engineering also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 11). RoofPair's advantage is ratings volume (7 vs 2). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. RoofPair sells 11 in-app purchases, starting at $35.00 per month. Donan Engineering asks for nothing beyond the download.

Donan Engineering holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 50% of RoofPair's written reviews are positive against 100% of Donan Engineering's.

RoofPair ships an update monthly, Donan Engineering every 6 weeks. The most recent releases landed on October 3, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | RoofPair | Donan Engineering |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/roofpair/id6741769273/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/donan-engineering/id6759627720/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 72 MB | 45 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Roof Pair Developments LLC](https://appshunter.io/developer/1876911189) | [HVAC Investigators, LLC](https://appshunter.io/developer/1419754098) |

## What reviewers say

### RoofPair

[App page](https://appshunter.io/ios/app/roofpair/id6741769273)

Instantly identify and compare roofing shingles using photos and measurements. Access detailed product data, visualize options on a roof, and find code-compliant alternatives quickly. Streamline roofing decisions for professionals.

**Highlights:** Photo-based shingle identification, Shingle visualizer, Comprehensive product database, Smart matching engine, Real-time comparisons, Technical documentation access

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RoofPair Basic - 1 Month | $35.00 | per month |
| RoofPair Pro - 1 Month | $75.00 | per month |
| RoofPair Pro - 1 Month | $324.99 | per month |
| RoofPair Pro - 1 Month | $350.00 | per month |
| RoofPair Pro - 1 Month | $374.99 | per month |
| RoofPair Pro - 1 Month | $379.99 | per month |
| RoofPair Basic - 1 Year | $399.00 | per year |
| RoofPair Pro - 1 Month | $400.00 | per month |
| RoofPair Pro - 1 Month | $450.00 | per month |
| RoofPair Pro - 1 Month | $474.99 | per month |
| RoofPair Pro - 1 Month | $500.00 | per month |


### Donan Engineering

[App page](https://appshunter.io/ios/app/donan-engineering/id6759627720)

This tool assists insurance professionals with field inspections by guiding them through data collection. Submit your findings and receive a sealed engineering report with answers from a licensed professional engineer, typically within 3 business days.

**Highlights:** Guided field inspection protocol, Photograph and documentation collection, Sealed engineering reports, Answers from licensed professional engineers, Fast report turnaround (avg. 3 business days)

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

**In-app purchases:** none


## Frequently asked questions

### Is RoofPair free?

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

### Is Donan Engineering free?

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

### Which has better reviews, RoofPair or Donan Engineering?

Donan Engineering is rated higher. RoofPair averages 4.4 out of 5 from 7 ratings, while Donan Engineering averages 5.0 from 2 ratings.

### Do RoofPair or Donan Engineering have ads?

Neither RoofPair nor Donan Engineering shows ads.

### Which is updated more often, RoofPair or Donan Engineering?

RoofPair ships an update monthly, and Donan Engineering every 6 weeks. Most recently, RoofPair was updated on October 3, 2026 and Donan Engineering on September 23, 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.*