Comparison

All in One Formula vs Engineering Formulas

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

Head to head
About

All in One Formula

Features
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All in One Formula is your essential pocket formula app, bringing together thousands of vital math formulas, physics equations, chemistry laws, and engineering principles in one powerful app. Whether you're a high school student, a college undergrad, or an engineering professional, this app is your go-to formula reference for academic success. - Key Features to Ace Your Studies: Complete Formula Library: Get instant access to an extensive collection of math, physics, chemistry, and engineering formulas. Organized for easy navigation into Basic, Intermediate, and Advanced levels. - Formula AI: Our intelligent assistant explains any formula instantly, making complex concepts easy to understand and learning faster than ever! Dynamic Color Themes & Dark Mode: Personalize your study experience with customizable colors and a dedicated Dark Mode, perfect for comfortable night-time sessions. - Built-in Periodic Table: A handy chemistry tool for quick access to elemental information. - Zoom In & Out: View formulas with crystal-clear rendering. - Easy Sharing: Share formulas effortlessly via email, messages, or social media. Universal Support: Works seamlessly across all your smartphones and tablets. Comprehensive Subject Coverage: - Math Formulas: Algebra, Trigonometry, Equations, Differentiation, Integration, Geometry, Matrix, Vectors, Binary Numbers, Unit Conversion, Interest, Probability, Statistics & more. - Physics Formulas: Motion, Newton’s Laws, Physical Constants, Pressure, Modulus, Density, Core Equations, Laws of Physics & Quick Reference Dictionary. - Chemistry Formulas: Chemical Symbols, Atomic Structure, SI Units, Gases, Liquids, Periodic Table, Chemistry Laws. - Engineering Formulas: Statics, Dynamics, Thermodynamics, Mechanics of Materials, Fluid Mechanics, Electrical Circuits, Magnetic Circuits & more. Download All-In-One Formula now and transform your device into the smartest math formula and pocket formula tool. With Formula AI, study smarter and deeper – anytime, anywhere. Essential for students, engineers, and curious minds! TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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: β€’ Mechanical Engineering: stress, strain, torque, power, gear ratios, spring design β€’ Electrical Engineering: Ohm's law, AC/DC circuits, impedance, resonance β€’ Civil/Structural: beam deflection, Euler buckling, Manning's equation β€’ Thermodynamics: ideal gas law, Carnot efficiency, heat transfer β€’ Fluid Mechanics: Bernoulli, Reynolds number, Darcy-Weisbach β€’ 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: β€’ Carbon steels (AISI 1018, 1045, 4140, 4340) β€’ Stainless steels (304, 316, 17-4 PH) β€’ Aluminum alloys (6061-T6, 7075-T6, 2024-T3) β€’ Titanium, copper, nickel alloys β€’ Plastics (ABS, HDPE, Nylon, PEEK, Delrin) β€’ Composites, concrete, and wood Compare up to 3 materials side-by-side with density, tensile strength, elastic modulus, thermal conductivity, and more. REFERENCE TABLES β€’ Bolt specifications: Metric M3-M36, SAE/Imperial sizes β€’ Pipe schedules: NPS dimensions and wall thickness β€’ 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 β€’ Dark and light themes (follows system setting) β€’ Favorites to bookmark frequently used formulas β€’ Calculation history with timestamps β€’ Create and save custom formulas β€’ Export and share your data β€’ LaTeX formula rendering β€’ 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

All in One Formula4 screens
Engineering Formulas4 screens

Verdict

The call

The clearest difference is update cadence: Engineering Formulas at every 2 months against All in One Formula's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

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

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

Both are free to download. All in One Formula sells 1 one-off in-app purchase and Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

All in One Formula ships an update every 6 months, Engineering Formulas every 2 months. The most recent releases landed on October 30, 2026 and November 3, 2026 respectively.

Scorecard1 real difference Β· 5 level
All in One Formula versus Engineering Formulas: the parameters behind the verdict, then further details
ParameterAll in One FormulaEngineering Formulas
PriceFreeFree
Update frequencyEvery 6 monthsEvery 2 months β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 β€” better15.1
Further details β€” not scored
Size90 MB45 MB
Age rating4+12+
DeveloperRaj Dev BarmanMobin Akhter

In-app purchases

1 purchases

All in One Formula

One-time1
  • All-in-One Formula Pro$24.99
3 purchases

Engineering Formulas

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

Questions

Is All in One Formula free?
All in One Formula is free to download, with in-app purchases available.
Is Engineering Formulas free?
Engineering Formulas is free to download, with in-app purchases available.
Do All in One Formula or Engineering Formulas have ads?
Neither All in One Formula nor Engineering Formulas shows ads.
Which is updated more often, All in One Formula or Engineering Formulas?
All in One Formula ships an update every 6 months, and Engineering Formulas every 2 months. Most recently, All in One Formula was updated on October 30, 2026 and Engineering Formulas on November 3, 2026.

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