# Roof Ventilator vs LeadFetch

The clearest difference is in-app purchases: LeadFetch at none against Roof Ventilator's 2. LeadFetch also leads on update cadence (every 4 months vs every 50 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Roof Ventilator sells 2 in-app purchases, starting at $8.99 per month. LeadFetch asks for nothing beyond the download.

Roof Ventilator ships an update every 50 months, LeadFetch every 4 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Roof Ventilator | LeadFetch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/roof-ventilator/id1578108810/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 4 months** |
| Monetization | Subscription | — |
| Size | 47 MB | 340 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GRANARACO LLC](https://appshunter.io/developer/1578108812) | [GrowthLab Media, LLC](https://appshunter.io/developer/1684269274) |

## What reviewers say

### Roof Ventilator

[App page](https://appshunter.io/ios/app/roof-ventilator/id1578108810)

This app calculates attic ventilation requirements based on your attic space and intake ventilation net free areas. It helps design ventilation systems to meet building code limits, suggesting vent quantities and types for optimal function. It also allows you to check existing systems and plan modifications.

**Highlights:** Calculates code requirements based on attic size, Determines exhaust vent and ridge vent quantities, Checks if current ventilation is within code, Suggests modifications for code compliance, Recommends specific vent types and amounts, Work backwards feature for existing systems, Evaluates added intake ventilation NFA

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $8.99 | per month |
| Roof Ventilator Annual | $34.99 | per year |


### LeadFetch

[App page](https://appshunter.io/ios/app/leadfetch/id6448290149)

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

**In-app purchases:** none


## Frequently asked questions

### Is Roof Ventilator free?

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

### Is LeadFetch free?

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

### Do Roof Ventilator or LeadFetch have ads?

Neither Roof Ventilator nor LeadFetch shows ads.

### Which is updated more often, Roof Ventilator or LeadFetch?

Roof Ventilator ships an update every 50 months, and LeadFetch every 4 months. Most recently, Roof Ventilator was updated on October 24, 2026 and LeadFetch on October 6, 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.*