Comparison

Construction Calculator A1 vs Strap Cost Calculator

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

Head to head
About

Construction Calculator A1

This comprehensive tool offers over 500 construction calculators, from basic material quantities to complex bills of quantities. It generates automatic drawings, manages material prices, and provides learning resources for civil engineers and contractors.

Highlights
  • 500+ construction calculators
  • Concrete, rebar, and steel calculations
  • Feet-inch calculator
  • Bill of Quantities (BOQ)
  • Automatic drawings
  • Material price library
  • Unit converter
Features
Read full description

The #1 construction calculator trusted by 1M+ contractors, builders, and engineers worldwide. Construction Calculator A1 — the complete civil engineering toolkit for contractors, builders and engineers. 500+ calculators, from a single slab to a client-ready Bill of Quantities. CONCRETE CALCULATOR • Slabs, footings, columns, beams, stairs, walls & culverts • Instant material quantities: cement bags, sand, aggregate • Mix ratios and grade selection for any specification REBAR & STEEL CALCULATOR • Bar Bending Schedule (BBS) with shape codes and cutting lengths • Weight calculator for metric and US bar sizes (#3–#11) • Lap length, cover & spacing calculations • Steel tonnage for structural estimates FEET-INCHES CALCULATOR • Add, subtract, multiply, divide in feet-inches-fractions • No decimal conversion needed • Running tape you can review and reuse BILL OF QUANTITIES (BOQ) — NEW • Send any calculation straight to a BOQ • Organise by project, track total value and % priced • Professional report with your company header and signature • Export as PDF or Excel AUTOMATIC DRAWINGS — NEW • Calculators draw a dimensioned sketch of what you entered • Brickwork, steel shapes, concrete sections, excavation, stairs • Drawings and a DIMENSIONS panel included in every PDF MATERIAL PRICE LIBRARY — NEW • Store your own rates in your own currency • Rates auto-fill into cost fields across the app • Six regional presets with local materials and units APPLE WATCH APP — NEW • Converter, material weight, volume, diagonal and rebar on your wrist • Prices synced from iPhone, with full calculation history AREA & VOLUME • 50+ shapes: rectangle, circle, triangle, trapezoid, polygons, prisms, cones, spheres and more • Draw Shape and GPS Area for irregular plots • Room area, paint coverage, flooring and excavation volumes UNIT CONVERTER • Length, area, volume, weight, pressure, power, speed, density and more • Construction-specific units throughout LEARN — NEW • Civil engineering articles, checklists and reference charts • Topic quizzes with instant explanations • Daily streaks, XP and achievement badges PROFESSIONAL FEATURES • Save and organise calculations by project, with notes and photos • Share estimates with clients instantly • Construction cost estimator with breakdown charts and quotations • Company branding on every report • Google Drive and iCloud backup, cloud sync across devices • Metric and Imperial, 16 languages, light and dark themes • Works offline — calculations need no internet SUBSCRIPTION INFORMATION Construction Calculator Pro is available as a monthly or yearly auto-renewing subscription, or as a one-time Lifetime purchase. • Payment is charged to your Apple ID account at confirmation of purchase. • Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. • Your account is charged for renewal within 24 hours prior to the end of the current period, at the rate of your selected plan. • Manage or cancel your subscription in your App Store account settings after purchase. Privacy Policy: https://www.binaryandbricks.com/app/privacypolicy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Built for real job sites. Download now and estimate like a pro.

About

Strap Cost Calculator

Easily compare the costs of plastic strapping based on coil size and pricing. This tool helps you find the best value for your strapping needs.

Highlights
  • Compare plastic strapping costs
  • Analyze different coil sizes
  • Evaluate pricing for value
  • Streamline cost analysis
Features
Read full description

A way to compare plastic strapping costs with different-sized coils and pricing for value

Screenshots

Construction Calculator A14 screens
Strap Cost Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Strap Cost Calculator at none against Construction Calculator A1's 6. Strap Cost Calculator also leads on ads (none vs shown) and review sentiment (100% vs 67%). Construction Calculator A1's advantage is ratings volume (29 vs 1). On price, device support and iOS requirement 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 Calculator A1 sells 6 in-app purchases, starting at $2.99 per month. Strap Cost Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Strap Cost Calculator holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Construction Calculator A1 has 29 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of Construction Calculator A1's written reviews are positive against 100% of Strap Cost Calculator's.

UpkeepUpdate frequency

Construction Calculator A1 ships an update monthly, Strap Cost Calculator daily. Both last shipped on October 30, 2026.

Scorecard7 real differences · 3 level
Construction Calculator A1 versus Strap Cost Calculator: the parameters behind the verdict, then further details
ParameterConstruction Calculator A1Strap Cost Calculator
PriceFreeFree
Rating4.7 (29 ratings)5.0 (1 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings29 — better1
Update frequencyMonthlyDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size182 MB31 MB
Age rating4+4+
DeveloperBinary And Bricks Pvt LtdDaddybug, inc

Customer experience

Construction Calculator A1

All ratings29 ratings
Positive93.1%
Neutral0.0%
Negative6.9%
Written reviews12 reviews
Positive66.7%
Neutral8.3%
Negative25.0%

Strap Cost Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

Construction Calculator A1

Subscriptions2
  • Pro access monthly subscription$2.991 Month
  • Pro access yearly subscription$24.991 Year
One-time4
  • 100 AI Credits$0.99
  • 500 AI credits$3.99
  • 500 AI credits$9.99
Show 1 more
  • Lifetime Access$39.99
None

Strap Cost Calculator

No in-app purchases

Questions

Is Construction Calculator A1 free?
Construction Calculator A1 is free to download, with in-app purchases available.
Is Strap Cost Calculator free?
Strap Cost Calculator is free to download, with no in-app purchases.
Which has better reviews, Construction Calculator A1 or Strap Cost Calculator?
Strap Cost Calculator is rated higher. Construction Calculator A1 averages 4.7 out of 5 from 29 ratings, while Strap Cost Calculator averages 5.0 from 1 ratings.
Do Construction Calculator A1 or Strap Cost Calculator have ads?
Construction Calculator A1 shows ads; Strap Cost Calculator does not.
Which is updated more often, Construction Calculator A1 or Strap Cost Calculator?
Construction Calculator A1 ships an update monthly, and Strap Cost Calculator daily. Most recently, Construction Calculator A1 was updated on October 30, 2026 and Strap Cost Calculator on October 30, 2026.

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