Structural Engineering Calc. vs Pressure Vessel Heads Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Structural Engineering Calc.
This app provides 59 essential structural engineering formulas for columns, beams, base plates, composite beams, and connections. It offers instant demand/capacity checks, a built-in AISC section database, and material references, supporting both USCS and SI units for on-site or office use.
- 59 structural formulas
- Instant demand/capacity checks
- Built-in AISC section database
- Material and code references
- USCS & SI unit support
- Pass/Fail visual indicators
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Structural Engineering Calculator delivers 59 AISC and ACI structural formulas with instant results, demand/capacity checks, a built-in AISC section database, and material references — all in one app. Whether you’re on site, in the office, or reviewing drawings, every calculation you need is in your pocket. 59 STRUCTURAL FORMULAS COLUMNS Critical Ratio (Cc), Effective Length Factor (K), Slenderness Ratio (KL/r), Allowable Compressive Stress (Sr less than Cc), Allowable Compressive Stress (Sr greater than Cc), Safety Factor, Maximum Axial Load. BEAMS Shear Capacity of Flexural Members, Allowable Bending Stress (Compact and Noncompact), Moment Gradient Factor (Cb), Allowable Flange Bending Stress, Plastic Moment (Mp), Lateral Unbraced Lengths (Lp and Lr), Limiting Buckling Moment (Mr), Nominal Moment (Mn), Critical Elastic Moment (Mcr), Allowable Shear Stress, Beam Deflection for UDL and Point Load. BASE PLATES Base Plate Area, Plate Thickness, Bearing Pressure, Flange and Web Thickness, Plate Dimensions N and B. COMPOSITE BEAMS Horizontal Shear for Concrete and Steel, Number of Shear Connectors, Transformed Section Properties, Modular Ratio, Elastic Neutral Axis. CONNECTIONS Allowable Shear with Tension Field Action, Allowable Bearing Stress for Rollers and Rockers, Axial Stress for Concentrated Loads, Allowable Bearing Stress on Fasteners, Number of Shear Connectors, Total Horizontal Shear. AISC CODE REFERENCES Every formula links directly to AISC and ACI clauses — AISC 360-16, AISC ASD 9th Edition, ACI 318-19, and AISC Design Guide 3. PASS / FAIL CHECK Instant visual adequacy check with demand/capacity ratio — green for PASS, red for FAIL. AISC SECTION PICKER Browse W-shapes (AISC 15th Edition) and auto-fill section properties instantly. REFERENCE TAB Built-in library with W-sections (W4–W44), ASTM materials (A36, A992, A572, A500, A325, A490, F1554), weld electrodes, concrete grades, and codes. USCS & SI UNITS Switch anytime between USCS (in, kip, ksi) and SI (mm, MPa) with automatic conversion. All section and material data included. Supports both USCS and SI units. Compatible with iPhone and iPad. One-time purchase — no subscriptions. References: AISC Steel Construction Manual 15th Edition, AISC 360-16, AISC ASD 9th Edition, ACI 318-19, AISC Design Guide 3.
Pressure Vessel Heads Pro
Calculate dimensions for various vessel heads like flat, torispherical, ellipsoidal, and hemispherical. Generates layout markings and coordinates for 2:1 ellipsoidal heads with customizable part divisions. All inputs are in millimeters.
- Calculate blank diameter
- Calculate crown radius
- Calculate knuckle radius
- Calculate height (with/without SF)
- Supports flat, torispherical, ellipsoidal, and hemispherical heads
- 2:1 ellipsoidal head template layout marking
- Customizable layout part divisions
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Pressure Vessel Heads Calculator is a professional engineering and fabrication tool for calculating dimensions, blank diameter, weight, radii, and height of commonly used pressure vessel heads and dish ends. Designed for pressure vessel fabricators, mechanical engineers, manufacturing professionals, workshop technicians, estimators, QA/QC engineers, and students, the app provides fast and convenient calculations for pressure vessel head fabrication and material planning. Supported Pressure Vessel Heads • Flat Heads / Flat Dish Ends • Torispherical Heads / F&D Dish Ends • 2:1 Ellipsoidal Heads • Hemispherical Heads • Ellipsoidal Head Template Layout What You Can Calculate Depending on the selected head type, the app can calculate: • Blank Diameter • Head Height • Crown Radius • Knuckle Radius • Straight Face • Inside Diameter • Developed Dimensions • Head Weight • Material Weight Flat Head Calculator Calculate the required blank diameter, head height, and weight using the required dimensional and material inputs. 2:1 Ellipsoidal Head Calculator Calculate important head dimensions including crown radius, knuckle radius, height, blank diameter, and weight. The calculation can also account for straight face dimensions where applicable. Torispherical / F&D Head Calculator Calculate crown radius, knuckle radius, head height, blank diameter, and estimated weight for torispherical pressure vessel heads. Hemispherical Head Calculator Calculate radius, height, blank diameter, and weight for hemispherical pressure vessel heads. Ellipsoidal Head Template Layout Generate template layout marking information for ellipsoidal heads to assist with plate marking, cutting, fabrication, and forming operations. Material Weight Calculation Estimate head weight using material density. Select from commonly used materials or enter a custom material density for your specific application. Supported material options include: • Carbon Steel • Stainless Steel • Aluminium • Brass • Bronze • Copper • Lead • Custom Material Features • Fast engineering calculations • Fabrication-friendly results • Metric and Imperial units • Dimensions in mm or inches • Material density selection • Custom material density support • Clear input and output information • Visual input guidance • Template layout calculation • Simple and easy-to-use interface • No internet connection required • No distracting advertisements Designed For Pressure Vessel Fabrication, Boiler Manufacturing, Heat Exchanger Fabrication, Storage Tank Manufacturing, Process Equipment, Mechanical Engineering, Industrial Fabrication, Material Estimation, Costing, QA/QC Inspection, Workshop Engineering, and On-Site Engineering. Pressure Vessel Heads Calculator helps reduce manual calculations, save fabrication time, improve material estimation, and provide convenient dimensional information for pressure vessel head and dish end fabrication. Whether you are calculating a flat head, F&D head, 2:1 ellipsoidal head, hemispherical head, or developing an ellipsoidal head template, this app provides a convenient engineering tool for fabrication and workshop applications.
Screenshots
Verdict
The clearest difference is rating: Structural Engineering Calc. at 4.5 against Pressure Vessel Heads Pro's 1.0. Structural Engineering Calc. also leads on update cadence (every 10 months vs every 41 months) and ratings volume (20 vs 1). Pressure Vessel Heads Pro's advantage is price ($3.99 vs $5.99). On review sentiment, ads, in-app purchases and monetization model 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
Structural Engineering Calc. costs $5.99 and Pressure Vessel Heads Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Structural Engineering Calc. holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Structural Engineering Calc. has 20 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.
Structural Engineering Calc. ships an update every 10 months, Pressure Vessel Heads Pro every 41 months. The most recent releases landed on September 18, 2026 and August 21, 2026 respectively.
| Parameter | Structural Engineering Calc. | Pressure Vessel Heads Pro |
|---|---|---|
| Price | $5.99 | $3.99 — better |
| Rating | 4.5 (20 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 20 — better | 1 |
| Update frequency | Every 10 months — better | Every 41 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | V PUGAZHENTHI | Imran Pinjara |
Customer experience
Structural Engineering Calc.
Pressure Vessel Heads Pro
In-app purchases
Structural Engineering Calc.
No in-app purchases
Pressure Vessel Heads Pro
No in-app purchases





