250+ iOS apps curated and reviewed
With an average user rating of 3.6★, the roofing ventilation calculator category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.0★ (6) | No | No | Jun 2026 | |
| 2 |  | Free | 4.5★ (11) | No | No | May 2026 | |
| 3 |  | Free | 4.3★ (6) | No | Yes | May 2026 | |
| 4 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 5 |  | Free | 4.9★ (9.6K) | No | No | Sep 2026 | |
| 6 |  | $4.99 | 4.0★ (1) | No | No | Aug 2026 | |
| 7 |  | Free | — | No | Yes | Jun 2026 | |
| 8 |  | $0.99 was $1.99 | — | No | No | Aug 2026 |
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.
Calculate the number of roof vents needed for a balanced attic ventilation system. This app helps determine intake and exhaust options, roof pitch, and soffit panel requirements. It also provides product information and tools for Whirlybird installations.
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.
