Comparison

GH vs Engineering Formulas

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

Head to head
About

GH

Features
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PASS YOUR GITHUB COPILOT CERTIFICATION EXAM 500+ practice questions 5-minute study sessions Track progress and daily streaks 94% first-attempt pass rate WHY GET CERTIFIED? Certified developers earn up to $203K annually (Skillsoft 2024). Microsoft GH-300 validates expertise in using GitHub Copilot to optimize software development workflows with AI-powered assistance. WHAT YOU'LL MASTER: Responsible AI practices and ethical usage considerations Copilot plans: Individual, Business, and Enterprise features GitHub Copilot Chat, CLI, and IDE integration Prompt crafting and engineering best practices Testing generation with unit and integration tests Privacy fundamentals and content exclusions Knowledge Bases and custom models for Enterprise STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into AI-assisted development expertise. Download now. Pass your exam. Code smarter with GitHub Copilot.

About

Engineering Formulas

Features
Read full description

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/

Screenshots

GH3 screens
Engineering Formulas4 screens

Verdict

The call

The clearest difference is in-app purchases: GH at none against Engineering Formulas's 3. On price, update cadence, ads 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. GH asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 24, 2026 and August 18, 2026 respectively.

Scorecard1 real difference Ā· 5 level
GH versus Engineering Formulas: the parameters behind the verdict, then further details
ParameterGHEngineering Formulas
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size26 MB45 MB
Age rating4+12+
DeveloperDavy RaittMobin Akhter

In-app purchases

None

GH

No in-app purchases

3 purchases

Engineering Formulas

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

Questions

Is GH free?
GH is free to download, with no in-app purchases.
Is Engineering Formulas free?
Engineering Formulas is free to download, with in-app purchases available.
Do GH or Engineering Formulas have ads?
Neither GH nor Engineering Formulas shows ads.
Which is updated more often, GH or Engineering Formulas?
GH ships an update every 2 months, and Engineering Formulas every 2 months. Most recently, GH was updated on September 24, 2026 and Engineering Formulas on August 18, 2026.

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