Comparison

EngiCalc vs Construction Expert A1 PRO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EngiCalc

This app provides specialized calculation tools for construction professionals. It helps optimize material usage, estimate quantities, and generate precise dimensions for various building elements like concrete pours, masonry, stairs, rafters, and roofing.

Highlights
  • Concrete material optimization
  • Masonry quantity estimation
  • Effortless stair dimension generation
  • Rafter length and angle calculation
  • Roofing material estimation
Features
Read full description

EngiCalc: The Ultimate Construction Calculator Suite Current Features: Concrete Calculator – Optimize material usage for your pours. Masonry Estimator – Calculate block and mortar quantities with precision. Stair Builder – Generate stair dimensions effortlessly by simply entering the total rise. Rafter Layouts – Quickly determine rafter lengths and angles. Roofing Calculator – Get accurate estimates for shingles and materials (i.e. felt paper) Future Updates Will Include: Electrical, plumbing, and additional engineering disciplines to expand the app’s capabilities.

About

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.

Highlights
  • 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
Features
Read full description

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

EngiCalc4 screens
Construction Expert A1 PRO4 screens

Verdict

The call

The clearest difference is in-app purchases: EngiCalc at none against Construction Expert A1 PRO's 3. EngiCalc also leads on update cadence (every 3 days vs fortnightly). Construction Expert A1 PRO's advantage is device support (4 vs 2). On price, rating, review sentiment and ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Construction Expert A1 PRO sells 3 in-app purchases, starting at $2.99 per month. EngiCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for EngiCalc against 5.0 for Construction Expert A1 PRO. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

EngiCalc ships an update every 3 days, Construction Expert A1 PRO fortnightly. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

Scorecard4 real differences · 6 level
EngiCalc versus Construction Expert A1 PRO: the parameters behind the verdict, then further details
ParameterEngiCalcConstruction Expert A1 PRO
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings22
Update frequencyEvery 3 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.615.0 — better
Further details — not scored
Size96 MB76 MB
Age rating4+4+
DeveloperJoshua WilliamsBinary And Bricks Pvt Ltd

Customer experience

EngiCalc

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Construction Expert A1 PRO

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EngiCalc

No in-app purchases

3 purchases

Construction Expert A1 PRO

Subscriptions2
  • Construction Expert Monthly Sub$2.991 Month
  • Construction Expert Yearly$14.991 Year
One-time1
  • Construction Expert Lifetime Access$24.99

Questions

Is EngiCalc free?
EngiCalc is free to download, with no in-app purchases.
Is Construction Expert A1 PRO free?
Construction Expert A1 PRO is free to download, with in-app purchases available.
Which has better reviews, EngiCalc or Construction Expert A1 PRO?
EngiCalc and Construction Expert A1 PRO are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do EngiCalc or Construction Expert A1 PRO have ads?
Neither EngiCalc nor Construction Expert A1 PRO shows ads.
Which is updated more often, EngiCalc or Construction Expert A1 PRO?
EngiCalc ships an update every 3 days, and Construction Expert A1 PRO fortnightly. Most recently, EngiCalc was updated on October 7, 2026 and Construction Expert A1 PRO on October 15, 2026.

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