Engineering Formulas vs ML Engineer Pro Prep
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Engineering Formulas
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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/
ML Engineer Pro Prep
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This application is an independent exam preparation resource and is not affiliated with, endorsed by, sponsored by, or associated with Google LLC or any of its subsidiaries. GCP-MLE (Google Cloud Professional Machine Learning Engineer) is a registered trademark of Google LLC. Prepare confidently for the Google Professional ML Engineer (GCP-MLE) exam. GCP-MLE Practice provides hundreds of carefully crafted practice questions. ā COMPREHENSIVE COVERAGE ⢠practice sets covering all exam domains ā REALISTIC EXAM EXPERIENCE ⢠Timed practice mode simulating the 120-minute exam ⢠Single and multiple-choice questions in exam format ⢠Exam readiness score to track your progress ā SMART STUDY TOOLS ⢠Detailed explanations for every question ⢠Spaced-repetition flashcards powered by FSRS algorithm ⢠Bookmarks for quick review ⢠Personal notes on any question ⢠Per-domain accuracy to identify weak areas ā MULTILINGUAL ⢠Available in English, Japanese, Korean, German, and Portuguese ā PRIVACY & OFFLINE ⢠Works completely offline ā no internet required ⢠No ads, no tracking Start with free practice sets. Unlock all sets with a one-time purchase.
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Verdict
The clearest difference is update cadence: ML Engineer Pro Prep at every 3 weeks against Engineering Formulas's every 2 months. ML Engineer Pro Prep also leads on iOS requirement (13.0 vs 15.1). 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
Both are free to download. Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days and ML Engineer Pro Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Engineering Formulas ships an update every 2 months, ML Engineer Pro Prep every 3 weeks. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.
| Parameter | Engineering Formulas | ML Engineer Pro Prep |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 weeks ā better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac ā better |
| Requires iOS | 15.1 | 13.0 ā better |
| Further details ā not scored | ||
| Size | 45 MB | 84 MB |
| Age rating | 12+ | 4+ |
| Developer | Mobin Akhter | AITYTECH |
In-app purchases
Engineering Formulas
- Weekly Premium$4.997 Days
- Yearly Premium$29.991 Year
- Lifetime Access$54.99
ML Engineer Pro Prep
- Premium - Lifetime$3.99
Questions
Is Engineering Formulas free?
Is ML Engineer Pro Prep free?
Do Engineering Formulas or ML Engineer Pro Prep have ads?
Which is updated more often, Engineering Formulas or ML Engineer Pro Prep?
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