# J vs GAF QuickMeasure

The clearest difference is rating: GAF QuickMeasure at 4.9 against J's 2.0. GAF QuickMeasure also leads on update cadence (monthly vs every 6 months) and ratings volume (997 vs 3). J's advantage is monetization model (free vs paid) and review sentiment (100% vs 83%). On price, ads, in-app purchases and device support there is nothing between them.

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

GAF QuickMeasure holds the better App Store score, 4.9 against 2.0. That said, the two scores are not equally well evidenced: GAF QuickMeasure has 997 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of J's written reviews are positive against 83% of GAF QuickMeasure's, so the app with the better star average is not the one people write more warmly about.

J ships an update every 6 months, GAF QuickMeasure monthly. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | J | GAF QuickMeasure |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/j-bend/id924459804/reviews) | **[4.9 (997 ratings)](https://appshunter.io/ios/app/gaf-quickmeasure/id6446208816/reviews)** |
| Number of ratings | 3 | **997** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 4 MB | 5 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jorns AG Lotzwil](https://appshunter.io/developer/924459803) | [GAF Corp.](https://appshunter.io/developer/480463171) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-bend/id924459804)

Create, modify, and manage sheet metal profile designs for roofing, cladding, and general metal construction. This tool is tailored for professionals in the metal building industry.

**Highlights:** Sheet metal profile drawing, Editing capabilities, Project organization, Roofing applications, Cladding applications, Metal building industry focus

**In-app purchases:** none


### GAF QuickMeasure

[App page](https://appshunter.io/ios/app/gaf-quickmeasure/id6446208816)

Generate comprehensive roof measurement reports quickly and accurately. Ideal for single-family homes with reports in under an hour, and commercial/multifamily properties within 24 hours. Reports include detailed measurements of roof area, pitch, and various components.

**Highlights:** Fast roof reports, Accurate measurements, Roof area calculation, Pitch and component details, Under 1-hour turnaround (single-family)

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and accurate measurement reports
- 💰 Competitive pricing compared to competitors
- 👍 User-friendly and intuitive interface
- 📱 Convenient mobile access to orders and reports
- 🔔 Helpful push notifications for report readiness

**What reviewers complain about**

- 🐛 Authentication issues with message codes not sending or expiring
- 🐛 Error messages when accessing order lists
- 🐛 App crashes and boots users out unexpectedly
- 📱 Poor responsive design on iPad and iPhone
- 🔒 Lack of transparency about data privacy and third-party sharing

**Reported bugs**

- Message code authentication not sending or timing out
- Order list error - 'orders not found' message causing app crashes
- App does not properly adjust layout for iPad and iPhone orientations
- App boots users out when encountering errors

**Requested features**

- Improved responsive design for tablets and mobile devices
- Better orientation handling for iPad and iPhone use
- Clearer disclosure of pricing and data collection policies during registration


## Frequently asked questions

### Is J free?

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

### Is GAF QuickMeasure free?

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

### Which has better reviews, J or GAF QuickMeasure?

GAF QuickMeasure is rated higher. J averages 2.0 out of 5 from 3 ratings, while GAF QuickMeasure averages 4.9 from 997 ratings.

### Do J or GAF QuickMeasure have ads?

Neither J nor GAF QuickMeasure shows ads.

### Which is updated more often, J or GAF QuickMeasure?

J ships an update every 6 months, and GAF QuickMeasure monthly. Most recently, J was updated on October 2, 2026 and GAF QuickMeasure on October 18, 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.*