Rebar Calc is a construction utility app for iOS that calculates rebar, mesh, and concrete volume requirements for contractors.
The App DNA
What makes this app unique?
Users hire this tool to reduce the time spent on manual material takeoffs during concrete projects, ensuring accurate ordering without complex desktop software.
For Concrete construction professionals and contractors requiring quick material estimates and procurement quotes.
Key features
Calculates tons and linear feet of rebar, sheet mesh, and roll mesh with configurable lap, size, and spacing parameters.
Calculates volume in cubic yards or meters for slabs and concrete cores, including a bag calculator for specific mixes like Quikrete.
One-tap interface to request quotes on rebar, mesh, and concrete supplies.
Includes support for European and Canadian rebar standards alongside imperial and metric units.
How much does it cost?
The app operates as a free utility tool, likely serving as a lead generation mechanism for the developer's broader industrial product and consulting services.
Velocity
Dormant developmentopaqueShow more...
The app has recorded only one release in the last four months, falling well below the threshold for active development. With no updates since mid-February 2026, the development momentum is classified as zombie status. There is no evidence of new features, bug fixes, or live operations during this period.
Who built it?
User Sentiment
What do users think recently?
Review voice lately leans excited.
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Rebar Calc
How's the Utilities market?
Rebar Calc maintains a high 4.87 rating across 599 reviews, positioning it as a trusted utility for concrete estimation. The lack of recent feature updates suggests a maintenance-mode strategy rather than aggressive market expansion.
Read the market outlookThe rivals identified
By H3 Apps, LLC
This app directly competes for the same construction professional audience by focusing exclusively on rebar grid estimation and unit conversion.
- Offers integrated unit conversion tools that simplify international project planning for construction contractors
- Provides a dedicated result-sharing feature that allows users to export calculations directly to project stakeholders
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Rebar Calc
Where is it heading?
The construction utility market is shifting toward integrated project management, where standalone calculators are becoming secondary to collaborative tools. Rebar Calc remains stable due to its high trust, but it risks becoming a legacy tool if it fails to connect with broader project workflows.
- The app maintains a stable rating, but the lack of new features suggests it is not competing for new market share.
- Competitors are adding collaborative features, which will eventually erode the utility of a standalone, non-connected calculator.
The SWOT
- High user trust evidenced by 599 ratings
- Broad material support including sheet and roll mesh
- Integrate direct project-sharing workflows
- Add camera-based measurement tools for physical site verification
Next best moves
Ship project-sharing export functionality because competitors offer direct stakeholder sharing → increase user retention
The counter-intuitive read
The app's lack of aggressive monetization is its primary moat…
Read the full takeFeature gaps
Result-sharing export (available in Rebar Grid Calculator) +1
Since the last report: The app's competitive strategy has pivoted from addressing geometric math gaps to addressing collaborative project-sharing deficiencies.
Bottom line
Rebar Calc holds a strong reputation for estimation accuracy but lacks the collaborative features required for modern construction workflows, so the PM should prioritize project-sharing to prevent churn to more integrated competitors.
Unlock 2 critical frictions, 2 market threats and the analyst’s take.
Access the full report for freeReport last updated