# Atlas Docs vs Roofing Ventilation Calculator

The clearest difference is review sentiment: Atlas Docs at 100% against Roofing Ventilation Calculator's 0%. Atlas Docs also leads on rating (4.2 vs 3.0). Roofing Ventilation Calculator's advantage is update cadence (every 3 months vs every 14 months). On price, ratings volume, 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.

Atlas Docs holds the better App Store score, 4.2 against 3.0. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews point the same way: 100% of Atlas Docs's written reviews are positive against 0% of Roofing Ventilation Calculator's.

Atlas Docs ships an update every 14 months, Roofing Ventilation Calculator every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Atlas Docs | Roofing Ventilation Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/atlas-docs/id624801441/reviews)** | [3.0 (6 ratings)](https://appshunter.io/ios/app/roofing-ventilation-calculator/id1035643148/reviews) |
| Number of ratings | 5 | **6** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 9 MB | 34 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Atlas Roofing Corporation](https://appshunter.io/developer/624801445) | [Saint-Gobain](https://appshunter.io/developer/543924473) |

## What reviewers say

### Atlas Docs

[App page](https://appshunter.io/ios/app/atlas-docs/id624801441)

Access building product marketing and technical materials, including manuals, images, and brochures. Stay updated with the latest information on shingles, underlayments, and ventilation from a leading roofing manufacturer.

**Highlights:** Product brochures and data sheets, Technical bulletins and evaluation reports, Images and video resources, Spanish and French-Canadian translations, Live search across product categories, Cloud-based, up-to-date content, Access to online calculators and marketing assets

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

**In-app purchases:** none


### Roofing Ventilation Calculator

[App page](https://appshunter.io/ios/app/roofing-ventilation-calculator/id1035643148)

Calculate the necessary amount of ventilation products for an attic space. Input attic dimensions or square footage to receive results based on the NFA 1/300 rule for balanced ventilation.

**Highlights:** Attic dimension input, Square footage input, NFA 1/300 rule calculation, Ventilation product quantity determination, Balanced ventilation planning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atlas Docs free?

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

### Is Roofing Ventilation Calculator free?

Roofing Ventilation Calculator is free to download, with no in-app purchases.

### Which has better reviews, Atlas Docs or Roofing Ventilation Calculator?

Atlas Docs is rated higher. Atlas Docs averages 4.2 out of 5 from 5 ratings, while Roofing Ventilation Calculator averages 3.0 from 6 ratings.

### Do Atlas Docs or Roofing Ventilation Calculator have ads?

Neither Atlas Docs nor Roofing Ventilation Calculator shows ads.

### Which is updated more often, Atlas Docs or Roofing Ventilation Calculator?

Atlas Docs ships an update every 14 months, and Roofing Ventilation Calculator every 3 months. Most recently, Atlas Docs was updated on November 1, 2026 and Roofing Ventilation Calculator on November 2, 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.*