Comparison

Deflection Lite vs Constropedia Steel BBS Calc

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

Head to head
About

Deflection Lite

This app provides interactive and precise structural beam analysis. Easily visualize beam bending by dragging loads and supports, and calculate key engineering results like reactions, shear force, and bending moment.

Highlights
  • Interactive beam bending visualization
  • Calculate reactions, shear force, and bending moment
  • Built-in cross-section databases
  • Unlimited loads and supports
  • Export design to shareable permalink
  • Metric and standard units
Features
Read full description

Deflection Lite is the most interactive, fast, and precise app available for structural beam analysis. Simply drag loads and supports on the beam, and see how it bends. RESULTS Calculate reactions, shear force, bending moment, and beam deflection quickly and easily. CROSS SECTION DATABASES Specify elastic modulus and moment of inertia values directly, or find common shapes and materials using the built-in databases, which include most international steel sections, as well as some aluminum and wood shapes. UNLIMITED LOADS AND SUPPORTS Simply drag any load or support on the beam. • Concentrated point loads • Distributed loads • Moment loads • Simple supports • Fixed supports • Fixed hinges • Floating Gerber hinges OTHER FEATURES • Export your design to a permalink that you can share. • Automatic detection of local maxima and minima in diagrams • Metric and standard measurement units CONTACT We like to hear from you! Please email contact@ketchep.com if you have any issues, questions, or comments.

About

Constropedia Steel BBS Calc

This app provides fast and accurate steel reinforcement calculations for construction professionals. It simplifies planning and execution by generating detailed bar bending schedules, estimating steel weights, and performing comprehensive quantity calculations for various structural elements. The user-friendly interface ensures accessibility for all users.

Highlights
  • Bar bending schedules for slabs, columns, footings, beams
  • Steel weight estimation
  • Quantity calculations for structural elements
  • Cutting length and lap length calculations
  • BBS shapes codes and tensile strength testing
  • Integrated scientific calculator
Features
Read full description

Constropedia Steel BBS Calc is the ultimate tool for civil engineers, contractors, and construction professionals. This powerful app provides fast and accurate steel reinforcement calculations, making it easier to plan and execute your projects with precision. Whether you’re calculating bar bending schedules, estimating steel weights, or managing construction materials, Constropedia Steel BBS Calc has you covered. Key Features: Accurate Bar Bending Schedules: Generate detailed bar bending schedules for slabs, columns, footings, beams, and retaining walls. Our app simplifies complex calculations, saving you time and ensuring precision in every project. Advanced Steel Weight Calculator: Calculate the exact weight of reinforcement steel for any construction project. From small residential projects to large commercial builds, this feature ensures you meet all your steel requirements. Versatile Application: Ideal for civil engineers, construction contractors, site managers, estimation engineers, and more. Constropedia Steel BBS Calc is designed to support a wide range of construction-related tasks, making it an essential tool for every construction professional. User-Friendly Interface: With an intuitive design, the app is accessible to both technical and non-technical users. Perform accurate calculations with just a few taps, whether you’re on-site or in the office. Comprehensive Quantity Calculations: Footing, Column, Beam, and Slab Calculations: Easily calculate the quantity of steel required for various structural elements. Whether you’re working on footings, columns, beams, or slabs, our app provides precise measurements to ensure your project’s success. Cutting Length and Lap Length Calculations: Simplify your calculations for cutting length and lap length, including various types to suit different construction needs. Whether you're dealing with overlaps, extensions, or specific reinforcement requirements, our app delivers accurate results every time. Detailed Insights: Get comprehensive data on the total and individual lengths of bars, weight of reinforcement steel, and more. This ensures that every aspect of your project planning and execution is covered. BBS Shapes Codes & Testing: Stay compliant with industry standards by using our BBS shapes codes and tensile strength testing features. These tools help you ensure the quality and safety of your constructions. Customizable Themes & Integrated Calculator: Tailor the app to your preferences with customizable themes. Use the integrated scientific calculator for all your complex calculation needs, ensuring you have all the tools you need in one place. Fast, Reliable, and Accurate: Constropedia Steel BBS Calc is built to deliver quick and precise results, making it the go-to app for all construction-related calculations. Why Choose Constropedia Steel BBS Calc? Designed for Professionals: Whether you’re a civil engineer, contractor, or site manager, this app is tailored to meet the needs of construction professionals. All-in-One Solution: From bar bending schedules to steel weight calculations, manage all your reinforcement calculations in one app. Efficiency and Precision: Save time and reduce errors with our fast and accurate calculation tools, ensuring your projects are completed on time and within budget. Who Should Use This App? Civil Engineers: Plan and execute your projects with confidence using precise calculations. Construction Contractors: Manage your steel reinforcement needs efficiently and accurately. Site Managers: Keep your projects on track with detailed calculations and reports. Estimation Engineers: Accurately estimate material needs and costs for any construction project. We Value Your Feedback: Your feedback helps us improve Constropedia Steel BBS Calc. If you have any suggestions or need assistance, contact us at rebar@constropedia.com. Join the community of construction professionals who rely on Constropedia for their reinforcement calculations.

Screenshots

Deflection Lite4 screens
Constropedia Steel BBS Calc4 screens

Verdict

The call

The clearest difference is rating: Deflection Lite at 4.5 against Constropedia Steel BBS Calc's 3.2. Deflection Lite also leads on in-app purchases (none vs 1) and update cadence (every 3 months vs every 12 months). Constropedia Steel BBS Calc's advantage is iOS requirement (13.0 vs 15.0). On price, review sentiment, ads 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. Constropedia Steel BBS Calc sells 1 one-off in-app purchase. Deflection Lite asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Deflection Lite holds the better App Store score, 4.5 against 3.2. That said, the two scores are not equally well evidenced: Deflection Lite has 46 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 44% of Deflection Lite's written reviews are positive against 50% of Constropedia Steel BBS Calc's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Deflection Lite ships an update every 3 months, Constropedia Steel BBS Calc every 12 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

Scorecard6 real differences · 4 level
Deflection Lite versus Constropedia Steel BBS Calc: the parameters behind the verdict, then further details
ParameterDeflection LiteConstropedia Steel BBS Calc
PriceFreeFree
Rating4.5 (46 ratings) — better3.2 (5 ratings)
Positive reviews44.4% of reviews50.0% of reviews — better
Number of ratings46 — better5
Update frequencyEvery 3 months — betterEvery 12 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size108 MB43 MB
Age rating4+4+
DeveloperBlue KetchepBinary And Bricks Pvt Ltd

Customer experience

Deflection Lite

All ratings46 ratings
Positive82.6%
Neutral10.9%
Negative6.5%
Written reviews9 reviews
Positive44.4%
Neutral0.0%
Negative55.6%

Constropedia Steel BBS Calc

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Deflection Lite

No in-app purchases

1 purchases

Constropedia Steel BBS Calc

One-time1
  • Pro Version$4.99

Questions

Is Deflection Lite free?
Deflection Lite is free to download, with no in-app purchases.
Is Constropedia Steel BBS Calc free?
Constropedia Steel BBS Calc is free to download, with in-app purchases available.
Which has better reviews, Deflection Lite or Constropedia Steel BBS Calc?
Deflection Lite is rated higher. Deflection Lite averages 4.5 out of 5 from 46 ratings, while Constropedia Steel BBS Calc averages 3.2 from 5 ratings.
Do Deflection Lite or Constropedia Steel BBS Calc have ads?
Neither Deflection Lite nor Constropedia Steel BBS Calc shows ads.
Which is updated more often, Deflection Lite or Constropedia Steel BBS Calc?
Deflection Lite ships an update every 3 months, and Constropedia Steel BBS Calc every 12 months. Most recently, Deflection Lite was updated on September 17, 2026 and Constropedia Steel BBS Calc on September 10, 2026.

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