Comparison

シンプル建築単位変換 vs Construction Calculator

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

Head to head
About

シンプル建築単位変換

Features
Read full description

建築プロのための便利ツール! 建築単位変換アプリ 建築業界の単位変換をラクラク!シンプル操作で、京間、江戸間、中京間など、さまざまな規格に対応します。 煩わしい計算や値を調べる手間はもう必要ありません。 特徴: ・建築業界でよく使用される単位の簡単な変換 ・シンプルで使いやすいインターフェース ・京間、江戸間、中京間などの多くの規格に対応

About

Construction Calculator

This app provides a comprehensive suite of tools for construction professionals and DIY enthusiasts. It offers precise calculations for decking, roofing, stairs, concrete, and more, with support for both metric and imperial units. Designed for jobsite use, it works offline and provides clear visuals for accurate on-site measurements.

Highlights
  • Decking and flooring calculations
  • Roofing material and coverage estimators
  • Stair and stringer rise/run calculations
  • Concrete, asphalt, and gravel volume estimators
  • Slope, pitch, and angle framing helpers
  • Unit converter with mixed-unit support
  • Offline functionality
Read full description

Build faster, measure smarter. Pro² is a complete construction calculator for decking, roofing, concrete, stairs, framing and precise on-site measurements. It’s made for builders, carpenters, contractors and serious DIY who need accurate answers in seconds. DECKING & FLOORING • Area, board runs, spacing and waste allowance • Material takeoff for boards and joists ROOFING (METAL & TILE) • Coverage and sheet/tile counts • Overhangs, pitch, angle and rafter length helpers STAIRS & STRINGERS • Rise/run, slope %, angle (°) and stringer length • Clear breakdowns and step-by-step visuals BALUSTERS, RAILING & EVEN SPACING • Perfect marks from 0 to full length • Spacing tables for clean, consistent layouts CONCRETE, ASPHALT, GRAVEL & SOIL • Volume estimators for slabs, pads, footings and fills • Smart rounding for real-world quantities SLOPE, PITCH & ANGLES • Fast framing helpers for cuts and layout • Metric and imperial support in every tool UNIT CONVERTER • Length, area, volume, density and weight • Built for mixed-unit jobs (mm, ft, inches) QUICK CALCULATOR • Running history with one-tap copy/share MADE FOR THE JOBSITE • Fraction support and practical defaults • Works fully offline—no signal required • Clean visuals that stay readable outdoors WHY PROS USE PRO² • One app instead of juggling multiple separate tools • Accurate results, simple inputs and clear diagrams • New tools and improvements arrive regularly based on user feedback Pro² is built for professional construction, carpentry, decking, roofing and framing work—yet intuitive enough for DIY home projects. Upgrade to unlock additional tools and advanced features when you’re ready to grow your toolkit. SUBSCRIPTION TERMS • Carpenter Pro is an optional auto-renewing subscription with Weekly and Annual plans. • A 3-day free trial is available on the Annual plan. • Payment is charged to your Apple ID and subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. • You can manage or cancel your subscription in your App Store account settings. • Lifetime is a one-time purchase and does not auto-renew. • The localized price is shown in-app before you confirm. Terms of Use (Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shapkin.dev/apps/carpenter/privacy.html

Screenshots

シンプル建築単位変換2 screens
Construction Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: シンプル建築単位変換 at none against Construction Calculator's 15. シンプル建築単位変換 also leads on iOS requirement (16.0 vs 18.0). Construction Calculator's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Construction Calculator sells 15 in-app purchases, starting at $2.99 per 7 days. シンプル建築単位変換 asks for nothing beyond the download.

UpkeepUpdate frequency

シンプル建築単位変換 ships an update every 2 months, Construction Calculator every 2 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
シンプル建築単位変換 versus Construction Calculator: the parameters behind the verdict, then further details
Parameterシンプル建築単位変換Construction Calculator
PriceFreeFree
Rating—4.8 (24 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—24 — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better18.0
Further details — not scored
Size4 MB62 MB
Age rating4+4+
DeveloperS K S, K.K.Shapkin Dev

In-app purchases

None

シンプル建築単位変換

No in-app purchases

15 purchases

Construction Calculator

Subscriptions4
  • Carpenter PRO - Weekly$2.997 Days
  • Full Access — Weekly$5.997 Days
  • Carpenter PRO — Annual3 Days trial$19.991 Year
Show 1 more
  • Full Access — Annual3 Days trial$39.991 Year
One-time11
  • RL Level & Benchmark Calculator$3.99
  • Gravel Volume Calculator$3.99
  • Stair Stringer & Rise Run Calc$3.99
Show 8 more
  • Soil Excavation Volume Calculator$3.99
  • Asphalt Tonnage Calculator$3.99
  • Right Triangle & Pitch Calculator$3.99
  • Running Measurements Calculator$3.99
  • Unit Converter: Feet & Metric$3.99
  • Paint Area Coverage Estimator$3.99
  • Lifetime Access$39.99
  • Lifetime Access$79.99

Questions

Is シンプル建築単位変換 free?
シンプル建築単位変換 is free to download, with no in-app purchases.
Is Construction Calculator free?
Construction Calculator is free to download, with in-app purchases available.
Do シンプル建築単位変換 or Construction Calculator have ads?
シンプル建築単位変換 shows ads; Construction Calculator does not.
Which is updated more often, シンプル建築単位変換 or Construction Calculator?
シンプル建築単位変換 ships an update every 2 months, and Construction Calculator every 2 weeks. Most recently, シンプル建築単位変換 was updated on October 27, 2026 and Construction Calculator on October 30, 2026.

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