Comparison

Project Engineer vs Rebar BBS

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

Head to head
About

Project Engineer

Features
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Project Engineer is a complete engineering toolkit for iPhone and iPad: hundreds of technical calculators across the disciplines you actually use, in one clean, fast, results-focused app. No more juggling spreadsheets, textbooks, lookup tables, and one-off websites. Enter your inputs and get clear, instantly readable results, with the theory and equations behind every answer. INSTANT METRIC ↔ IMPERIAL Switch any input or result between metric and imperial units with a single tap. No re-typing, no manual conversions. Every value updates on the spot. BUILT FOR REAL ENGINEERING WORK Project Engineer spans civil, structural, environmental, mechanical, electrical and more, for example: - Manning's equation for pipe and open-channel flow - Hydraulics, hydrology & stormwater - Structural steel, reinforced concrete & connections - Geotechnical, foundations & retaining walls - Thermodynamics, heat transfer & fluid mechanics - Roads, traffic & geometric design - Electrical, building services & acoustics - Mathematics, numerical methods & statistics - Solar position & PV sizing …and many more, with new calculators on the way. SEE THE WORKING Every calculator includes a theory section with the governing equations, variable definitions and reference sources, so you can see exactly how a result was reached and check it against your own working. LIVE-DATA TOOLS (PREMIUM) A standout you won't find in ordinary calculator apps: calculators that pull real-world climate and environmental data from live sources to give site-specific results, including rainwater tank sizing, irrigation demand, reservoir yield and pond-level exceedance. Turn textbook formulas into answers grounded in the real conditions at your location. DESIGNED FOR CLARITY & SPEED - Instant metric/imperial switching on every value - A consistent, distraction-free layout so the answer is always front and centre - Fast, on-device calculations - Save your results and sync them across devices - Mark favourites for the tools you use most SIMPLE, FAIR PLANS - Free: a selection of calculators to get started - Pro: the full standard library, unlimited saved results, favourites, and cloud sync - Premium: everything in Pro, plus live-data tools and early access to new features WHO IT'S FOR Practising engineers, designers, drafters, technicians, and engineering students who want dependable calculations without the clutter, at the desk or in the field. Project Engineer is a calculation aid. Results should be checked and applied by a suitably qualified person in line with the relevant codes and standards. Project Engineer continues to improve based on your feedback. Have a request or spotted something? Reach us anytime through the in-app contact form. Subscriptions are auto-renewable and billed through your Apple ID; they renew unless cancelled at least 24 hours before the period ends, and you can manage or cancel anytime in your device settings. Terms of Service: https://projectengineer.app/terms Privacy Policy: https://projectengineer.app/privacy

About

Rebar BBS

Features
Read full description

Rebar BBS - Bar Bending is a smart and easy-to-use construction app designed for civil engineers, site supervisors, contractors, and rebar workers. The app helps you quickly create accurate Bar Bending Schedules (BBS) for RCC reinforcement work with minimal effort. Using a simple step-by-step process, you can draw reinforcement bar shapes directly on the canvas, enter bar diameter and quantity details, and instantly generate complete BBS reports for construction projects. The built-in rebar detailing system makes steel calculation faster, easier, and more accurate for beams, columns, slabs, footings, and other RCC structures. The app also includes a powerful steel weight calculator that helps estimate reinforcement weight per meter for better material planning and cost estimation. Key Features: • Easy Bar Bending Schedule (BBS) generation • Interactive rebar drawing canvas • Reinforcement cutting length calculator • Steel weight and quantity calculator • Accurate rebar detailing tools • Supports RCC beam, column, slab & footing calculations • Fast and user-friendly interface • Useful for civil engineers, contractors & students • Saves time and reduces manual calculation errors The visual canvas feature allows engineers to create and understand reinforcement layouts more efficiently, improving communication between designers, supervisors, and steel benders on-site. Whether you are working on residential, commercial, or industrial construction projects, Rebar BBS Calculator simplifies reinforcement planning and makes steel estimation more professional and reliable. In-app purchase Details: Lifetime Access for ads free version Privacy Policy : https://visionaso.in/manager/privacypolicy.html Terms of use : https://visionaso.in/manager/termscondition.html

Screenshots

Project Engineer4 screens
Rebar BBS4 screens

Verdict

The call

The clearest difference is iOS requirement: Rebar BBS at 13.0 against Project Engineer's 15.1. On price, 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

Both are free to download. Project Engineer sells 4 in-app purchases, starting at $5.99 per month and Rebar BBS sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 5 level
Project Engineer versus Rebar BBS: the parameters behind the verdict, then further details
ParameterProject EngineerRebar BBS
PriceFreeFree
Update frequencyWeekly—
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size75 MB43 MB
Age rating4+4+
DeveloperShaw AbreyAshvin Kevadiya

In-app purchases

4 purchases

Project Engineer

Subscriptions4
  • Pro7 Days trial$5.991 Month
  • Premium7 Days trial$12.991 Month
  • Pro (Annual)7 Days trial$49.991 Year
Show 1 more
  • Premium (Annual)7 Days trial$99.991 Year
1 purchases

Rebar BBS

One-time1
  • Lifetime Premium$17.99

Questions

Is Project Engineer free?
Project Engineer is free to download, with in-app purchases available.
Is Rebar BBS free?
Rebar BBS is free to download, with in-app purchases available.
Do Project Engineer or Rebar BBS have ads?
Neither Project Engineer nor Rebar BBS shows ads.

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