BuildCalc icon

42nd Parallel

For professional contractors, builders, and tradespeople requiring precise job site math and documentation.

Known forBuildCalc
1app4.7(68)Utilities

Snapshot

Who is 42nd Parallel?

Equipping professional contractors with high-precision construction math and layout tools to streamline complex job site calculations.

Target audience

Professional contractorsBuildersTradespeople requiring precise job site math

Active nemesis

Calculated Industries

Other rivals

Portfolio

1
app
Utilities1

Last updated

BuildCalc

v2.15.1

7mo ago

Steady

Publisher DNA

What defines 42nd Parallel?

Publisher DNA

Primary focus

Professional construction and trade utility tools

Scale

indie

Target audience

Professional contractors, builders, and tradespeople requiring precise job site math and documentation.

Signature Patterns

  • •Focus on professional-grade, high-precision construction math
  • •Monetization via a one-time paid purchase model
  • •Specialized layout tools for stairs, balusters, and fencing
  • •Support for professional documentation and export via AirPrint
Steady

Portfolio momentum

Maintains a steady development cadence with 3 updates in the last 6 months for their flagship utility.

Last release 26d agoActive apps 1

Portfolio

What does 42nd Parallel ship?

Apps

1 app analysed

BuildCalc icon
BuildCalc

Smart construction tools: material, tile, paint, and interior budget calculators

4.7(68)

High-touch developer support drives retention among long-term professional tradespeople

  • Advanced stair and baluster layout functions save significant time for professional carpenters on job sites
  • Input field logic automatically erases user values when calculating irregular hip roof dimensions

Single-market publisher, every app ships only to United States.

Based on 1 of 1 app with localized market data · last scanned .

Americas (1)

  • United States1 / 1

Core markets (1/1 apps)

United States

User Sentiment

How do users feel about their apps?

1

Positive apps

0

Neutral / mixed

0

Negative apps

85/100

Avg sentiment score

Rivals

Who does 42nd Parallel compete with?

The rivals identified

Nemeses(1)

Calculated Industries

known forConstruction Master Pro Calc

5 apps4.9Utilities

Both apps target professional contractors with specialized construction-math engines, creating direct competition for the same field-based user base.

Contenders(6)

Anna Filobok

known forRoofing Calculator Pro

1 app3.9Utilities

Both apps target professional contractors and builders with geometric construction math, creating direct competition for field-ready utility.

Bugfoot Studios

known forTape Measure Calculator Pro

1 app4.8Utilities

Both apps target construction professionals and DIYers requiring precise measurement math, creating direct competition for field-ready utility. The overlap in target audience forces a choice between BuildCalc's specialized structural tools and the rival's accessible visual interface.

Cyberprodigy

known forBaluster Calculator Elite

1 app4.9Utilities

Both apps target professional contractors and stair builders with specialized construction math tools, creating direct competition for the same job-site utility.

RedX Technology

known forRedX Roof - Rafter Calculator

1 app4.7Utilities

RedX Roof targets the same professional contractor audience as BuildCalc by offering specialized roof framing and blueprint generation tools. It competes directly with BuildCalc's roof analysis features while providing a free entry point and 3D visualization.

Vladislav Zhirnov

known forDeck Planner & Calculator

1 app0.0Utilities

Both apps target professional carpenters and builders with specialized construction-math engines, creating direct competition for job-site utility.

xNeat.com

known forConstruction Calculator

1 app4.6Utilities

Construction Calculator targets the same professional and student demographic as BuildCalc by offering core dimensional conversion tools, but uses a freemium model that lowers the barrier to entry for casual users.

Same space(9)

Air Apps Systems

known forCalculator Air: AI Math Solver

1 app4.7Utilities

Calculator Air serves as a general-purpose educational alternative for users who need AI-driven equation solving rather than specialized construction math.

Byteworks Software

known forWood Calc: Shop Calculator

1 app5.0Utilities

Wood Calc targets hobbyist woodworkers with material-aware calculators, providing a workbench-focused alternative to general construction math.

Greg Gabrio

known forBalusterPro

1 app4.2Utilities

BalusterPro offers a focused utility for baluster spacing, serving as a specialized subset of the broader layout tools found in BuildCalc.

Impala Studios

known forCalculator₊

1 app4.7Utilities

Calculator₊ acts as a high-volume, general-purpose utility that captures the broader market segment before users specialize into professional tools.

Infoguide Pty

known forRoof Guide - Carpentry Calc

1 app4.1Utilities

Roof Guide competes in the professional framing space by providing dedicated modules for roof and stair geometry.

Mikhail Nikitin

known forDuct Calculator - DuctCalc

1 app4.5Utilities

DuctCalc addresses a specific HVAC engineering niche, providing specialized psychrometric analysis that complements general construction tools.

Oryx

known forConstruction Calculator Pro #1

1 app4.5Utilities

Construction Calculator Pro #1 provides a free, mobile-native alternative for rafter geometry and material estimation, appealing to cost-conscious tradespeople.

TERMUX LIMITED LIABILITY COMPANY

known forConstruction Calculator Plus

1 app4.5Utilities

Construction Calculator functions as a lightweight productivity tool for on-site building calculations, serving as a simpler alternative for field professionals.

V PUGAZHENTHI

known forBeam Calculator

1 app4.0Utilities

Beam Calculator provides a technical engineering utility for structural analysis, serving professionals who require code-compliant beam calculations.

The Analyst's Read

The bottom line on 42nd Parallel

Bottom line

42nd Parallel is a disciplined indie publisher successfully defending a professional utility niche through high-depth features and a paid monetization model. Their consistent update cadence suggests a commitment to maintaining BuildCalc as a reliable tool for the construction industry.

Frequently asked questions

How many apps does 42nd Parallel publish?
42nd Parallel has 1 app tracked by Marlvel, primarily in the Utilities category.
What kind of apps does 42nd Parallel make?
42nd Parallel's portfolio is concentrated in Utilities, with an average rating of 4.7/5 across rated apps.
What is 42nd Parallel's top app?
By review volume across the portfolio, BuildCalc is 42nd Parallel's best-known app tracked by Marlvel.
In how many countries are 42nd Parallel's apps available?
Marlvel has tracked 42nd Parallel's apps across 1 country.

What fed this analysis

Apps analyzed:
1
With full intel:
0
With overview:
1
Website scraped:
yes
Social presence:
no

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by 42nd Parallel, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “42nd Parallel intelligence.” Updated 2026-04-24. https://marlvel.ai/publishers/42nd-parallel

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Data licensed under CC-BY-NC 4.0