Comparison

Civil Engineering Professional vs CRSI Rebar Reference

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

Head to head
About

Civil Engineering Professional

This app provides civil engineers and students with a comprehensive collection of over 1,000 essential formulas, conversion tools, and professional reference tables. It covers a wide range of civil engineering topics, from structural design to soil mechanics, with support for both US and SI units.

Highlights
  • Over 1,000 civil engineering formulas
  • 700 conversion formulas
  • 56 temperature scale conversions
  • 6 professional reference tables
  • US and SI unit switching
  • Calculation history
  • Feedback for new content
Features
Read full description

CIVIL ENGINEER PRO is the essential tool for any Civil Engineer or engineering student. Our Civil Engineer app contains over 1,000 important formulas, 700 conversion formulas, 56 temperature scale conversions, and 6 professional reference tables — all at your fingertips. Reference tables include Rebar Sizes (ASTM A615), Manning's Roughness Coefficients, Terzaghi Bearing Capacity Factors, USCS Soil Classification (ASTM D2487), Steel W-Beam Properties (AISC), and Rational Method Runoff Coefficients. Sort and browse data from trusted public domain sources including FHWA, USACE, and AISC. Major areas covered include: Area Formulas, International Building Code, Building Charts, Building Code Formulas, Beams, Bridges, Columns, Concrete, Concrete and Excavating, Elevators, Material Weight, Piles, Piping, Plates, Pressure Stress, Roads, Shear, Soil, Steel, Tension and Compression, Wood, Temperature Scales, and Conversions. Quickly access favorite formulas, switch between US and SI units, and view your calculation history. If you don't see a formula or reference table you need, just send us feedback through the app and we'll try to include it in the next update.

About

CRSI Rebar Reference

Access essential data for reinforcing bars (rebar) including specifications, hook details, and marking requirements. This app serves as a quick reference for industry standards and links to online resources.

Highlights
  • ASTM standard reinforcing bar specifications
  • Standard hook details (90, 135, 180 degrees)
  • Stirrup/tie hook details
  • ASTM reinforcing bar marking requirements
  • Minimum yield and tensile requirements
  • Links to CRSI online resources
Features
Read full description

QUICK REFERENCE! This ready reference app from the Concrete Reinforcing Steel Institute is a handy desk and field resource and includes information on ASTM standard reinforcing bars (rebar), standard hook details, standard stirrup/tie hook details, and ASTM reinforcing bar marking requirements. The app provides standard rebar specifications including sizes, diameters, areas and weights along with 90-, 135- and 180-degree hook details. Minimum yield and minimum tensile requirements per ASTM are also included. Industry standard bar markings for inch-pound rebar is illustrated for grades 40, 50, 60, 75, 80, 100 (A615), 100 (A1035), and 120. Links to the CRSI’s online resources are included.

Screenshots

Civil Engineering Professional4 screens
CRSI Rebar Reference4 screens

Verdict

The call

The clearest difference is price: CRSI Rebar Reference at Free against Civil Engineering Professional's $9.99. CRSI Rebar Reference also leads on review sentiment (33% vs 0%) and update cadence (every 5 weeks vs every 7 months). On ads, in-app purchases 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

CRSI Rebar Reference is free to download; Civil Engineering Professional costs $9.99 up front. Civil Engineering Professional sells 1 one-off in-app purchase and CRSI Rebar Reference sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Civil Engineering Professional ships an update every 7 months, CRSI Rebar Reference every 5 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
Civil Engineering Professional versus CRSI Rebar Reference: the parameters behind the verdict, then further details
ParameterCivil Engineering ProfessionalCRSI Rebar Reference
Price$9.99Free — better
Rating—3.3 (16 ratings) — better
Positive reviews0.0% of reviews33.3% of reviews — better
Number of ratings—16 — better
Update frequencyEvery 7 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.1 — better
Further details — not scored
Size17 MB51 MB
Age rating4+17+
DeveloperHistorycentral.comConcrete Reinforcing Steel Institute

Customer experience

Civil Engineering Professional

Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

CRSI Rebar Reference

All ratings16 ratings
Positive50.0%
Neutral12.5%
Negative37.5%
Written reviews9 reviews
Positive33.3%
Neutral11.1%
Negative55.6%

In-app purchases

1 purchases

Civil Engineering Professional

One-time1
  • Civil Engineering Pro$3.99
3 purchases

CRSI Rebar Reference

One-time3
  • CRSI - Rebar Identifier Module$2.99
  • CRSI Development Length ACI$4.99
  • CRSI Development length AASHTO$4.99

Questions

Is Civil Engineering Professional free?
Civil Engineering Professional costs $9.99, and also offers in-app purchases.
Is CRSI Rebar Reference free?
CRSI Rebar Reference is free to download, with in-app purchases available.
Do Civil Engineering Professional or CRSI Rebar Reference have ads?
Neither Civil Engineering Professional nor CRSI Rebar Reference shows ads.
Which is updated more often, Civil Engineering Professional or CRSI Rebar Reference?
Civil Engineering Professional ships an update every 7 months, and CRSI Rebar Reference every 5 weeks. Most recently, Civil Engineering Professional was updated on November 1, 2026 and CRSI Rebar Reference on November 2, 2026.

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