2026-10-30★★★★★
5/5
lifetime access and all related construction calculations are what useful for me
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Download Construction Expert A1 PRO APK Free and replace a $100+ hardware calculator with a smarter construction calculator app on your phone. Construction Expert A1 PRO is a construction calculator trusted by contractors, builders, carpenters, and engineers, covering feet-inch-fraction math, roof framing, stair layout, trade calculators, material estimation, and project tools in one app.
Whether you are a general contractor estimating a bid, a framer cutting rafters, an electrician sizing wire, or a DIY homeowner planning a deck, the app holds every calculation you need. Enter dimensions the way you think, and get answers in feet, inches, yards, meters, centimeters, or millimeters.
The professional calculator handles full feet-inch-fraction math with fractional entry from 1/16 to 1/64 resolution and auto-simplification, plus percentage, square, cube, square root, reciprocal, D:M:S (degrees-minutes-seconds), and trigonometry (sin, cos, tan). Expression mode adds 12 construction formula templates, a running tape with save, share, and print, and 3 memory registers with cumulative memory, count, and average.
– Right Angle and Roof Framing: solve any right triangle from pitch, rise, run, and diagonal, and work out common rafter length, plumb cut, and level cut angles.
– Hip and Valley Rafters: figure hip/valley rafter lengths with cheek cut angles, jack rafter lengths with on-center increment, and irregular roof support for dual-pitch hip/valley.
– Rake Walls and Roof Area: get rake wall stud lengths, ascending or descending, plus roof area, squares, bundles, and 4×8 sheet count, with interactive rafter diagrams.
– Stair Layout: turn total rise into finished risers and treads, adjust risers for code compliance, and find stringer length and inclination angle, with open or closed stringer support and an interactive stair diagram.
With these framing and layout tools, a carpenter can move from a measurement on the tape to a cut list without a second calculator.
Seven trade calculators cover electrical, plumbing, HVAC, and landscaping work, while material estimation and project tools keep the numbers tied to the job. The app also converts units and exports results, so a calculation can move straight into a bid or a report.
– Electrical Trade Calculator: size wire to NEC rules, and work out voltage drop, load, conduit fill, box fill, outlet spacing, and service sizing.
– Plumbing Trade Calculator: size pipes, and calculate DFU, water heater needs, fitting offsets, drain slope, and pressure loss.
– HVAC and Landscaping: work out BTU load, duct sizing, CFM, refrigerant charge, and filter sizing, plus mulch, gravel, sod, irrigation, retaining wall, and paver quantities.
– 57 Area and Volume Shapes: calculate perimeter, surface area, and volume for shapes from simple squares to L-shaped rooms, gable walls, pipe volumes, and toruses, with interactive diagrams and labeled dimensions.
– 50+ Unit Converters: convert length, area, volume, weight, temperature, and pressure, including construction units such as concrete bags, rebar, CMU blocks, and board feet.
– Material Estimation: work out board feet, stud spacing and count, concrete volume for slabs, footings, and columns, roofing squares, bundles, felt, and ridge vent, plus drywall sheets, baluster spacing, and fence materials.
– Project Management: organize calculations by project, add rich text notes with folder organization and photo attachments, star favorite calculators, and search calculation history.
– Export and Share: create professional PDF reports with company branding, export CSV spreadsheets and PNG images, share plain text, and use 7 specialized PDF generators for rafter, stair, fence, baluster, compound miter, materials, and estimate reports.
– Customization: switch between dark mode, light mode, and system theme, use 5 languages (English, Spanish, French, German, Arabic), set fractional resolution from 1/2 to 1/64, choose Imperial or Metric defaults, and add home screen widgets with haptic feedback and sound effects.
With its trade calculators, material estimates, and project tools, Construction Expert A1 PRO puts a full construction calculator in your pocket. Androidru.com Android App Store is the best and safest APK downloader in 2027, so get the Construction Expert A1 PRO APK for Android there and see why professionals are switching from their hardware calculators.
a96587159d6184d5...1effcfSafety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
No data collected
✓ No virus✓ No spyware✓ No malware✓ No trojan
6929edcb0e4ee4c2299cf3b3c2757a092597c6aeca8e144f9eafd3f306daf287
a96587159d6184d5a59f2e5a37656587fc9f3de337af454b228bff144c1effcf
Version 2026.10.26 · 36.6 MB · APK
SHA-256 6929edcb0e4ee4c2299cf3b3c2757a092597c6aeca8e144f9eafd3f306daf287
Signer a96587159d6184d5a59f2e5a37656587fc9f3de337af454b228bff144c1effcf
Architecture arm64-v8a
58 ratings
58 ratings on AndroidRU. 3 written reviews on AndroidRU, 25 shown below. Their honest reviews of this app.
lifetime access and all related construction calculations are what useful for me
Deceptive Advertising +Description. Only able to make 5 calculations per day. Very Angry.
good app
If you work with imperial measurements, this app is extremely handy. Feet and inch calculations are simple and fast.
This app has almost everything I need for construction calculations in one place. Saves a lot of time compared to checking formulas manually.
It only allows 3 tries and then locks, which isn't enough to show how good it can be.
The feet and inches calculator alone saves me a lot of time. Fractions are easy to work with and I don’t have to keep doing conversions manually.
Construction Expert A1 PRO is a very useful app for construction professionals in the USA and Canada. It has a wide range of practical construction calculators and supports both Imperial and Metric units, making everyday calculations quick and easy. What I like most is that it’s a one-time purchase — no monthly or yearly subscription. Pay once and use the PRO features forever. Great value for contractors, estimators, engineers, and other construction professionals.
simply awesome. Great app for contractors and construction professionals. Lots of useful calculators, easy to use, and works well with US construction units. One-time purchase instead of another monthly subscription is a big plus.
updated app fixed the issue really fast, app is awesome now. thank you developer's 😊
Great app for contractors. Accurate calculations and no monthly subscription. Worth every penny.
nice
it's very useful app
Great app,it simplifies complex construction calculations and helps improve productivity.Very useful for daily site work.
Everything I need on the jobsite in one app. Roof framing, stairs, material takeoffs, and feet-inch math. No subscription is a huge bonus.
best salution for management
best app
Fast, accurate and the interface is clean. Lifetime purchase , no ads, no subscription. The developers actually respects their users. Very rare these days.
Best construction calculator app. Simple UI and helpful features.
Loved that it's a one time purchase. Sick of subscriptions for everything. This is how app should be.
Saved me from carrying two devices on the jobsite. Phone + this app = everything I need.
good app
The stair calculator alone paid for itself on my first project. Code-compliant risers and treads in seconds.
This app is extreus useful for construction work. I use it regufor roof calcul, stair layout, and unit conversions. Everyis in one place , whi h saves lot of time o site. The best part is that it's a one-time purchase with no subscription.
Finally an app that actually understands feet-inches-fractions. Every other calculator app gets this wrong
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Converter signature verified. Discover and download millions of the latest Android apps and games for free at AndroidRU.com. Fast, secure, and always updated with top-rated APKs. Download Construction Expert A1 PRO APK Free, fast, safe, reliable, and daily updated, this application supports ABI: arm64-v8a. AndroidRU.com is the number one Best Google Play Store Alternative in 2027 for Safe APK Downloads. Get the best Premium Android apps & games APKs for free now. All apps and games are unlocked & ad-free. Best download apk latest version from Androidru.com APK downloader Sourced directly from Google Play — automatically clean.
The download is 36.6 MB. Keep at least that much free space, plus room for the installed app.
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