# Roofing Ventilation Calculator vs VoxSMS

The clearest difference is rating: VoxSMS at 5.0 against Roofing Ventilation Calculator's 3.0. Roofing Ventilation Calculator's advantage is update cadence (every 3 months vs every 10 months) and ratings volume (6 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

VoxSMS holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Roofing Ventilation Calculator has 6 ratings behind it against 1, so its average is the more settled of the two.

Roofing Ventilation Calculator ships an update every 3 months, VoxSMS every 10 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Roofing Ventilation Calculator | VoxSMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (6 ratings)](https://appshunter.io/ios/app/roofing-ventilation-calculator/id1035643148/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/voxsms/id1514259980/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 34 MB | 55 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saint-Gobain](https://appshunter.io/developer/543924473) | [Textable LLC](https://appshunter.io/developer/1395042035) |

## What reviewers say

### 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


### VoxSMS

[App page](https://appshunter.io/ios/app/voxsms/id1514259980)

Communicate via SMS using your dedicated business phone numbers. This app allows you to send and receive text messages directly from your mobile device, integrating seamlessly with your existing service.

**Highlights:** Send and receive SMS, Use business phone numbers, Mobile messaging, Voxtelesys integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Roofing Ventilation Calculator free?

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

### Is VoxSMS free?

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

### Which has better reviews, Roofing Ventilation Calculator or VoxSMS?

VoxSMS is rated higher. Roofing Ventilation Calculator averages 3.0 out of 5 from 6 ratings, while VoxSMS averages 5.0 from 1 ratings.

### Do Roofing Ventilation Calculator or VoxSMS have ads?

Neither Roofing Ventilation Calculator nor VoxSMS shows ads.

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

Roofing Ventilation Calculator ships an update every 3 months, and VoxSMS every 10 months. Most recently, Roofing Ventilation Calculator was updated on October 24, 2026 and VoxSMS on October 24, 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.*