# Window Glass Design vs Kerfly

The clearest difference is iOS requirement: Window Glass Design at 15.5 against Kerfly's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Window Glass Design sells 1 in-app purchase, starting at $149.99 per year and Kerfly sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Window Glass Design | Kerfly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/window-glass-design/id1312067026/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Subscription | — |
| Size | 5 MB | 13 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Standards Design Group, Inc.](https://appshunter.io/developer/949960891) | [Alex Salas](https://appshunter.io/developer/1770273393) |

## What reviewers say

### Window Glass Design

[App page](https://appshunter.io/ios/app/window-glass-design/id1312067026)

This app assists in designing window glass by performing calculations based on ASTM E 1300 standards. It allows customization of support, glazing angles, lites, heat treatment, thickness, lamination, and loads. Results include load resistances and deflection, with options to export as PDF.

**Highlights:** ASTM E 1300 calculations, Customizable support and glazing angles, Multi-lite design with customizable properties, SI or US unit load entry, Load resistance and deflection results, PDF export of results

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mobile Subscription | $149.99 | per year |


### Kerfly

[App page](https://appshunter.io/ios/app/kerfly-cut-list-optimizer/id6793647038)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kerfly PRO Monthly | $4.99 | per month |
| Kerfly PRO Annual | $24.99 | per year |


## Frequently asked questions

### Is Window Glass Design free?

Window Glass Design is free to download, with in-app purchases available.

### Is Kerfly free?

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

### Do Window Glass Design or Kerfly have ads?

Neither Window Glass Design nor Kerfly shows ads.

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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.*