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.
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.
- 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
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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.
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.
- 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
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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.
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Verdict
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
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.
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.
| Parameter | Civil Engineering Professional | CRSI Rebar Reference |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | — | 3.3 (16 ratings) — better |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | — | 16 — better |
| Update frequency | Every 7 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 17 MB | 51 MB |
| Age rating | 4+ | 17+ |
| Developer | Historycentral.com | Concrete Reinforcing Steel Institute |
Customer experience
Civil Engineering Professional
CRSI Rebar Reference
In-app purchases
Civil Engineering Professional
- Civil Engineering Pro$3.99
CRSI Rebar Reference
- CRSI - Rebar Identifier Module$2.99
- CRSI Development Length ACI$4.99
- CRSI Development length AASHTO$4.99
Questions
Is Civil Engineering Professional free?
Is CRSI Rebar Reference free?
Do Civil Engineering Professional or CRSI Rebar Reference have ads?
Which is updated more often, Civil Engineering Professional or CRSI Rebar Reference?
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