OConstruction vs Construction Expert A1 PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OConstruction
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Orangescrum Construction is a specialized project management tool designed for the construction industry, streamlining workflows, communication, and task management. It provides features like resource allocation, task scheduling, project tracking, and collaboration tools, ensuring seamless coordination between teams and stakeholders. With Orangescrum Construction, construction managers can efficiently handle timelines, budgets, and documentation while keeping all project data centralized. Its user-friendly interface and industry-specific features make it ideal for managing large-scale construction projects effectively and on time.
Construction Expert A1 PRO
This app is a comprehensive construction calculator designed for professionals. It offers advanced calculations for framing, stair layout, trade-specific needs, and material estimation, replacing the need for expensive hardware calculators.
- Feet-inch-fraction math
- Right angle and roof framing
- Stair layout calculations
- Trade-specific calculators (Electrical, Plumbing, HVAC)
- Area and volume calculations for 57 shapes
- Material estimation tools
- Project management and export options
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Replace your $100+ hardware calculator with a smarter one. Construction Expert A1 Pro puts 150+ professional construction calculators in your pocket — feet-inch-fraction math, roofing, rafters, stairs, framing, concrete, material take-offs and more. Works fully offline. Built for general contractors, framers, carpenters, builders, estimators, electricians, plumbers, HVAC pros and serious DIY builders. WHY CONTRACTORS SWITCH - Enter 12' 7-3/16" the way you read it on the tape — no decimal conversion - Live drawings highlight each dimension as you enter it, so you know what every number means - One consistent keypad across every calculator, with a Next key that guides you through each form - Save calculations by project, attach photos, export branded PDF reports for your bid - No signal needed — works on the roof, in the basement or at the back of the lot PROFESSIONAL CONSTRUCTION CALCULATOR - Full feet, inches & fraction math, 1/16 to 1/64 with automatic simplification - Feet, inches, yards, meters, centimeters & millimeters - Percentage, square, cube, square root & reciprocal - Degrees-minutes-seconds and trigonometry (sin, cos, tan) - Expression mode with 12 construction formula templates - Running tape with save, share & print - 3 memory registers plus cumulative memory with count & average ROOFING & RAFTER CALCULATORS - Pitch, rise, run & diagonal — solve right triangles instantly - Common rafter length with plumb and level cut angles - Hip, valley & jack rafters with cheek cuts and on-center increments - Irregular and dual-pitch roofs - Rake wall stud lengths, ascending or descending - Roof area, squares, bundles & 4x8 sheet count - Interactive rafter diagrams STAIR & STRINGER CALCULATOR - Total rise to risers, treads & total run - Riser adjustment - Stringer length and angle, open or closed stringers - Interactive stair diagram with labeled dimensions TRADE CALCULATORS - Electrical: wire sizing (NEC), voltage drop, conduit fill, box fill & service sizing - Plumbing: pipe sizing, DFU, water heater, fitting offsets & drain slope - HVAC: BTU load, duct sizing, CFM & refrigerant charge - Landscaping: mulch, gravel, sod, irrigation, retaining walls & pavers MATERIAL ESTIMATION & TAKE-OFFS - Concrete volume for slabs, footings & columns, plus bag counts and rebar - Board feet, stud spacing & stud counts - Roofing squares, bundles, felt & ridge vent - Drywall, siding, flooring & insulation - Fence, deck, baluster & spindle spacing 57+ AREA & VOLUME SHAPES - Rectangles to L-shaped rooms, gable walls, pipes & toruses - Concrete steps, retaining walls & trenches - Perimeter, area, surface area & volume with labeled interactive diagrams 50+ CONSTRUCTION UNIT CONVERTERS - Length, area, volume, weight, temperature & pressure - Concrete bags, rebar, CMU blocks, board feet & aggregates - Lumber, drywall, roofing, siding, flooring & insulation - Wire gauge, conduit & breakers; PVC, copper & PEX pipe; HVAC tonnage PROJECTS, NOTES & EXPORT - Organize calculations by project and folder, with rich-text notes and photos - Favorites and searchable history - Professional PDF reports with your company branding - 7 PDF generators: rafters, stairs, fences, balusters, miters, materials & estimates - CSV, PNG & plain-text export MADE TO FIT YOUR WORK - Imperial or metric default units; fraction resolution from 1/2 to 1/64 - Dark, light or system theme; home screen widgets; haptic feedback - English, Spanish, French, German & Arabic PRICING Choose a monthly or yearly subscription, or a one-time Lifetime purchase with no recurring charges. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Settings > Apple ID > Subscriptions. Privacy Policy: https://www.binaryandbricks.com/app/privacypolicy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: OConstruction at none against Construction Expert A1 PRO's 3. OConstruction also leads on update cadence (every 4 days vs fortnightly). Construction Expert A1 PRO's advantage is iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Construction Expert A1 PRO sells 3 in-app purchases, starting at $2.99 per month. OConstruction asks for nothing beyond the download.
OConstruction ships an update every 4 days, Construction Expert A1 PRO fortnightly. The most recent releases landed on September 14, 2026 and September 30, 2026 respectively.
| Parameter | OConstruction | Construction Expert A1 PRO |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | priyabrata gharai | Binary And Bricks Pvt Ltd |
In-app purchases
OConstruction
No in-app purchases
Construction Expert A1 PRO
- Construction Expert Monthly Sub$2.991 Month
- Construction Expert Yearly$14.991 Year
- Construction Expert Lifetime Access$24.99
Questions
Is OConstruction free?
Is Construction Expert A1 PRO free?
Do OConstruction or Construction Expert A1 PRO have ads?
Which is updated more often, OConstruction or Construction Expert A1 PRO?
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