Best Roofing Ventilation Calculator Apps

250+ iOS apps curated and reviewed

3.6 avg rating
18 free apps
Updated August 2026

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.

Compare top Roofing Ventilation Calculator Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Roofing Ventilation CalculatorRoofing Ventilation CalculatorFree3.0★ (6)NoNoJun 2026
2Lomanco Vent ToolsLomanco Vent ToolsFree4.5★ (11)NoNoMay 2026
3Roof VentilatorRoof VentilatorFree4.3★ (6)NoYesMay 2026
4Whole-House Ventilation CalcWhole-House Ventilation CalcFree5.0★ (1)NoNoMay 2026
5EagleViewEagleViewFree4.9★ (9.6K)NoNoAug 2026
6HVAC-calculatorHVAC-calculator$4.994.0★ (1)NoNoAug 2026
7RoofCalc - Roofing EstimatorRoofCalc - Roofing EstimatorFreeNoYesJun 2026
8Roofing EstimatorRoofing Estimator$0.99 was $1.99NoNoAug 2026

Top Picks for Roofing Ventilation Calculator

Lomanco Vent Tools#2

Lomanco Vent Tools by Lomanco, Inc.

Strong Contender
🔍 Reference
4.5(11 ratings)
Free
Lomanco Vent Tools screenshot 1
Lomanco Vent Tools screenshot 2
Lomanco Vent Tools screenshot 3
Lomanco Vent Tools screenshot 4
Lomanco Vent Tools screenshot 5
Lomanco Vent Tools screenshot 6

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.

Roof Ventilator#3

Roof Ventilator by GRANARACO LLC

Attic Ventilation Calculator
Worth Considering
📊 Productivity
4.3(6 ratings)
FreeIn-App Purchases
Roof Ventilator screenshot 1

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.

More Roofing Ventilation Calculator apps to explore

4
Whole-House Ventilation Calc
Whole-House Ventilation Calc
Whole-House Ventilation Calc
by GTR Technologies Inc
Free

Calculate required whole-house ventilation rates for residential buildings based on ASHRAE 62.2-2019 standards. Input home square footage and number of bedrooms, with an option to factor in blower door test results for natural ventilation.

Calculate required ventilation rateMeets ASHRAE 62.2-2019 standardsInput home square footage and bedrooms
🔧 Utilities
(1)
free
5
EagleView
EagleView
EagleView
Accurate roof and wall reports
Free

This app provides contractors with accurate property measurements for roofs and walls. It helps generate estimates, plan jobs, and visualize proposed improvements for clients. Access property imagery, upload your own, and annotate images for detailed planning.

Property measurementsEstimate generationJob planning
💼 Business
(9.6K)
free
6
HVAC-calculator
HVAC-calculator
HVAC-calculator
by Trond Rossvoll
$4.99

This app provides quick and easy calculations for HVAC professionals and enthusiasts. It simplifies complex formulas for energy use, airflow, and duct dimensions, making them accessible on your iPhone or iPad.

SFP calculationsHeat recovery efficiencyAir velocity in ducts
📊 Productivity
(1)
paid
7
RoofCalc - Roofing Estimator
RoofCalc - Roofing Estimator
RoofCalc - Roofing Estimator
Roof Material Estimator
Free
🔧 Utilities
(0)
8
Roofing Estimator
Roofing Estimator
Roofing Estimator
Finds roof area using pitch.
$0.99
$1.99 | 50% OFF
🔧 Utilities
(0)
9
Flozone Mobile
Flozone Mobile
Flozone Mobile
Roof Inspector App
Free
💼 Business
(0)
10
Air Flow Calculator
Air Flow Calculator
Air Flow Calculator
by Cornerstone Management Services Limited
Free
🔧 Utilities
(0)
11
HVAC Duct Calculator
HVAC Duct Calculator
HVAC Duct Calculator
Duct sizing made simple
Free
🔧 Utilities
(0)
12
Renson Ventilation
Renson Ventilation
Renson Ventilation
Smart ventilation App
Free

Monitor and control your home's indoor air quality with intelligent ventilation. Customize comfort settings, track air quality history, and receive filter maintenance alerts for a healthier living space.

Intelligent Air Regulation insightsReal-Time Air Quality MonitoringCustomizable Comfort Profiles (Health, Eco, Intense)
🌟 Lifestyle
(0)
free
13
Absolute Humidity – Calculator
Absolute Humidity – Calculator
Absolute Humidity – Calculator
Convert Relative to Absolute
Free

This app helps manage indoor humidity by comparing indoor and outdoor conditions. It provides personalized advice on when to ventilate your rooms to maintain optimal air quality and prevent issues like mold or respiratory discomfort.

Automatic absolute humidity calculationPersonalized ventilation adviceWeather integration for outdoor data
🔧 Utilities
(0)
free with in-app purchases
14
Omni CFM Calculator
Omni CFM Calculator
Omni CFM Calculator
Calculate CFM, ACH & Filters
Free
🔧 Utilities
(0)
15
Thermaflex Duct Calculator
Thermaflex Duct Calculator
Thermaflex Duct Calculator
by Gastite Products LLC
Free

This utility app helps HVAC engineers quickly calculate the recommended Thermaflex duct size for installations. Input project volume and friction loss to determine the optimal duct size based on established industry standards.

Calculate recommended duct sizeInput project volume and friction lossSelect Thermaflex product
🔧 Utilities
(1)
free
16
Roof Calculator & Rafter
Roof Calculator & Rafter
Roof Calculator & Rafter
Pitch, Angle, Area & Slope
Free
🔧 Utilities
(0)
17
VentAttico
VentAttico
VentAttico
Attic Ventilation Calculator
Free
🔧 Utilities
(0)
18
Rafterly: Rafter Calculator
Rafterly: Rafter Calculator
Rafterly: Rafter Calculator
Roof Pitch & Framing Angles
Free
🔧 Utilities
(0)
19
Powrmatic Heating Load Calculator
Powrmatic Heating Load Calculator
Powrmatic Heating Load Calculator
by Powrmatic Limited
Free

Calculate the heating load for simple rectangular buildings with natural air infiltration. Save calculations for future reference or email them directly from the app.

Calculate heating loadSimple rectangular building supportBrick/block or sheet construction
🔧 Utilities
(1)
free
20
Shingle - Roof Calculator
Shingle - Roof Calculator
Shingle - Roof Calculator
Professional Roofing Estimates
Free
💼 Business
(0)

FAQ about Roofing Ventilation Calculator

What are the best roofing ventilation calculator apps for iPhone?
Roofing Ventilation Calculator tops our roofing ventilation calculator apps ranking as of August 2026, with a 3.0-star average from 6 App Store ratings, and it's free to download.
Yes — 18 of the top roofing ventilation calculator apps we rank are free to download, including Roofing Ventilation Calculator and Lomanco Vent Tools.
Roofing Ventilation Calculator has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 250+ roofing ventilation calculator apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
The Roofing Ventilation Calculator bases its results on the NFA 1/300 rule, a standard for determining proper balanced attic ventilation.
The app provides calculations based on established industry rules. User ratings indicate an average of 3.4 stars from 5 ratings, suggesting mixed but generally functional performance.