Comparison

Engineering Formulas vs Structural Engineering Suite

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

Head to head
About

Engineering Formulas

Features
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EngiRef is the all-in-one engineering reference app that works 100% offline. Access formulas, material properties, reference tables, and a powerful unit converter - all without internet connection. FORMULA LIBRARY Browse 140+ essential engineering formulas organized by discipline: • Mechanical Engineering: stress, strain, torque, power, gear ratios, spring design • Electrical Engineering: Ohm's law, AC/DC circuits, impedance, resonance • Civil/Structural: beam deflection, Euler buckling, Manning's equation • Thermodynamics: ideal gas law, Carnot efficiency, heat transfer • Fluid Mechanics: Bernoulli, Reynolds number, Darcy-Weisbach • Materials Science: Young's modulus, Poisson's ratio, fatigue analysis BUILT-IN CALCULATOR Enter your values and get instant results. Every calculation shows step-by-step solutions so you understand the process, not just the answer. Perfect for learning and exam preparation. MATERIALS DATABASE Access properties for 55+ engineering materials: • Carbon steels (AISI 1018, 1045, 4140, 4340) • Stainless steels (304, 316, 17-4 PH) • Aluminum alloys (6061-T6, 7075-T6, 2024-T3) • Titanium, copper, nickel alloys • Plastics (ABS, HDPE, Nylon, PEEK, Delrin) • Composites, concrete, and wood Compare up to 3 materials side-by-side with density, tensile strength, elastic modulus, thermal conductivity, and more. REFERENCE TABLES • Bolt specifications: Metric M3-M36, SAE/Imperial sizes • Pipe schedules: NPS dimensions and wall thickness • Wire gauges: AWG 0000-40 with ampacity ratings UNIT CONVERTER Convert between 16 categories including length, pressure, temperature, force, energy, flow rate, and viscosity. Accessible from any screen via slide-over panel. PHYSICAL CONSTANTS Quick reference for 34 constants including speed of light, gravitational constant, Boltzmann constant, Avogadro's number, and more. QUIZ MODE Test your knowledge with flashcard-style quizzes. Track progress across all disciplines. Prepare for FE and PE exams. ADDITIONAL FEATURES • Dark and light themes (follows system setting) • Favorites to bookmark frequently used formulas • Calculation history with timestamps • Create and save custom formulas • Export and share your data • LaTeX formula rendering • iPad-optimized layouts PRIVACY FOCUSED EngiRef collects zero personal data. No analytics, no ads. All your calculations and favorites stay on your device. We believe engineering tools should respect your privacy. Whether you are a student preparing for exams, a working engineer needing quick field reference, or a technician looking for material specs, EngiRef puts essential engineering knowledge in your pocket. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Structural Engineering Suite

Features
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Learn structural engineering by exploring how loads move through structures, practicing calculations, and connecting drawings with engineering concepts. Structural Engineering Suite brings lessons, visual simulations, worked exercises, illustrations, and field-oriented tools together in one app. INTERACTIVE LEARNING • Follow learning paths and reinforce lessons with knowledge checks, quizzes, flashcards, and a glossary. • Explore shear and moment diagrams, truss forces, tributary loads, buckling, foundation pressure, and connections. • Predict outcomes, experiment with simplified models, and compare your reasoning with explanations. • Work through multi-step calculations, construction sequences, inspection evidence, and an integrated building case. • Use illustrated structural drawings and save model scenarios in an engineering notebook. STRUCTURAL TOOLS • Explore simplified beam and column calculations, load combinations, units, and materials. • Use inspection checklists and record observations with photos. • Review learning progress, revisit challenging topics, and set a daily practice goal. EDUCATIONAL SCOPE The calculators, simulations, and exercises use simplified assumptions. They are educational and reference aids, not complete design, safety, or code-compliance checks. Real projects require applicable standards, project-specific information, independent verification, and judgment by a qualified professional. ASCE, AISC, ACI, and other standards and trademarks belong to their respective owners. This app is independent and is not affiliated with or endorsed by those organizations.

Screenshots

Engineering Formulas4 screens
Structural Engineering Suite4 screens

Verdict

The call

The clearest difference is update cadence: Engineering Formulas at every 2 months against Structural Engineering Suite's every 5 months. Engineering Formulas also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days and Structural Engineering Suite sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Engineering Formulas ships an update every 2 months, Structural Engineering Suite every 5 months. The most recent releases landed on November 11, 2026 and November 13, 2026 respectively.

Scorecard2 real differences Ā· 4 level
Engineering Formulas versus Structural Engineering Suite: the parameters behind the verdict, then further details
ParameterEngineering FormulasStructural Engineering Suite
PriceFreeFree
Update frequencyEvery 2 months — betterEvery 5 months
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size45 MB76 MB
Age rating12+4+
DeveloperMobin AkhterYuhsiu Lai

In-app purchases

3 purchases

Engineering Formulas

Subscriptions2
  • Weekly Premium$4.997 Days
  • Yearly Premium$29.991 Year
One-time1
  • Lifetime Access$54.99
3 purchases

Structural Engineering Suite

One-time3
  • Structural Learning Studio$12.99
  • Structural Engineer's Toolkit$12.99
  • All Modules Bundle$19.99

Questions

Is Engineering Formulas free?
Engineering Formulas is free to download, with in-app purchases available.
Is Structural Engineering Suite free?
Structural Engineering Suite is free to download, with in-app purchases available.
Do Engineering Formulas or Structural Engineering Suite have ads?
Neither Engineering Formulas nor Structural Engineering Suite shows ads.
Which is updated more often, Engineering Formulas or Structural Engineering Suite?
Engineering Formulas ships an update every 2 months, and Structural Engineering Suite every 5 months. Most recently, Engineering Formulas was updated on November 11, 2026 and Structural Engineering Suite on November 13, 2026.

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