"Roofing app" covers three different jobs: calculators that turn your measurements into squares, materials and prices; measurement services that measure the roof for you from aerial imagery; and sales and business platforms. This ranking puts them side by side so you can pick the right tool — or the right two.
Across 7 apps we evaluated the features that matter to an actual user, not the ones that look good on a landing page:
Core math. Area, squares, pitch conversions and rafter lengths.
Materials and pricing. Bundles, underlayment, ridge cap, waste, labor and total job cost.
Measurement. Does the app measure the roof for you, or do you bring the numbers?
Job-site usability. Offline, readable in sunlight, usable with gloves.
Output. PDF estimates, reports or blueprints.
Cost. Free, paid per report, or subscription.
Roof work is dangerous — use fall protection. Calculators give estimates; verify against manufacturer specs and local code.
The Ranking
7 best roofing apps for iPhone in 2026
01
RoofingCalc Pro — Best Free Offline Roofing Calculator (Our App, Full Disclosure)
Disclosure. RoofingCalc Pro is built by Loveiko Labs — the studio publishing this article. We rank it first among calculators because it is completely free, works offline and covers area, materials, pitch, rafters and job cost in one app.
What it is. Four calculators — roof area and materials, pitch, rafter length, job cost — with PDF export, history, imperial/metric and a sunlight-readable dark theme.
Best for. Roofers and adjusters who already have measurements; apprentices; DIY homeowners.
Strengths. Free with no ads, subscription or account; zero data collected; works with no signal.
Limitations. Does not measure roofs from aerial imagery. No CRM or sales presentation tools. New and not yet rated.
GAF QuickMeasure — Best Aerial Measurement Reports
What it is. Order a complete roof measurement report — area, pitch, ridges, eaves, rakes, valleys, hips, flashing — delivered in under an hour for single-family homes.
Best for. Contractors who want measurements without climbing.
Strengths. 4.9★ from nearly 1K ratings; backed by a major shingle manufacturer.
Limitations. Paid per report (from $18); not a calculator for pricing jobs.
iRoofing — Best Sales Platform for Roofing Companies
What it is. Unlimited measurements from satellite, aerial, drone and blueprint images, auto pitch detection, a digital pitchbook, customer and task management.
Best for. Roofing businesses that want measurement plus sales tooling.
We put our own app first, so here is why — and where another app is the better pick. Here is where each app genuinely wins — including the cases where ours is not the right pick. App Store ratings and review counts were checked in October 2026.
Your situation
Best pick
Have measurements, need squares, materials and a price — free
RoofingCalc Pro
Need the roof measured without climbing
GAF QuickMeasure
Designing roof framing with cut lists
RedX Roof
Want one calculator for every trade
Construction Master Pro
Running a roofing sales team
iRoofing or Pitch Gauge
Just need the pitch from the ground
Roof Pitch Factor
No signal on site
RoofingCalc Pro — fully offline
Insurance adjuster needing a quick PDF
RoofingCalc Pro
What none of these apps do
No app replaces a proper inspection, manufacturer installation instructions or local building code. Rafter sizing, spans and structural decisions should be checked against code tables or by a qualified professional.
Roof work is one of the most dangerous jobs in construction. Use fall protection and never work on wet, icy or steep roofs without training and equipment.
Questions
Frequently asked questions
Why did you rank your own app first?
Among roofing calculators, RoofingCalc Pro is the only one here that is completely free with no ads, account or data collection, works fully offline and covers area, materials, pitch, rafters, job cost and PDF export together. If you need the roof measured for you, GAF QuickMeasure or iRoofing do something RoofingCalc Pro doesn't.
What is the best free roofing calculator app?
RoofingCalc Pro — all features free. Roof Pitch Factor is also free but only measures pitch.
Which app measures a roof from satellite images?
GAF QuickMeasure (paid per report), iRoofing (subscription) and Pitch Gauge (map-based tracing). EagleView also sells aerial reports.
Which app is best for rafter calculations?
RedX Roof for full 3D framing and cut lists; RoofingCalc Pro or Construction Master Pro for quick common, hip and valley rafter lengths.
How do I calculate roofing squares?
Sloped roof area ÷ 100. Sloped area = footprint × slope factor (≈ 1.054 at 4/12, 1.118 at 6/12, 1.202 at 8/12, 1.414 at 12/12).
Squares, bundles, rafters and a price — free and offline.
iPhone & iPad · no ads · no subscription · zero data collected
Editorial ranking disclosure. This article is an editorial ranking published by Loveiko Labs. We make RoofingCalc Pro, which is ranked #1 with full disclosure. We are not affiliated with GAF, RedX Technology, Calculated Industries, iRoofing (Applosophy), Pitch Gauge or Roof Pitch Factor. Information about other apps is summarized from their public App Store listings as of October 2026.
