Comparison

Mechanical Formula vs P&ID

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

Head to head
About

Mechanical Formula

This app provides over 200 essential mechanical engineering formulas and calculations in a user-friendly tool. It's designed to simplify complex concepts and speed up problem-solving for students, professionals, and educators.

Highlights
  • 200+ mechanical engineering formulas
  • Instant calculations
  • Intuitive interface
  • Real-world application explanations
  • Exam preparation aid
  • Lifetime Premium option
Features
Read full description

The Mechanical Engineering Formula & Calculator app brings together 200+ essential mechanical engineering formulas and calculations in one powerful and easy-to-use tool. Designed specifically for mechanical students, professionals, and educators, this app simplifies complex concepts and makes problem-solving faster and more accurate. Developed by engineers for engineers, this app covers a wide range of mechanical engineering topics, helping users understand the principles behind each formula and how they are applied in real-world scenarios. Whether you are studying, revising, or working on-site, this app serves as your reliable engineering companion. With an intuitive interface, you can easily select any calculator, enter the required values, and get instant results with clear output. No complicated steps — just accurate calculations at your fingertips. Perfect for: - Mechanical engineering students - Practicing engineers - Technical instructors - Exam preparation & quick reference Boost your productivity and master mechanical calculations with confidence. In app purchase included : Lifetime Premium Privacy policy : https://chatlyst.in/privacy.html Terms and condition : https://chatlyst.in/tcondition.html

About

P&ID

Master the art of reading and interpreting Piping and Instrumentation Diagrams (P&IDs) with this engaging trivia quiz. Test your knowledge of P&ID symbols and their applications through interactive quizzes with detailed explanations and real-world examples. Learn at your own pace with multiple difficulty levels and offline mode.

Highlights
  • Interactive P&ID symbol quizzes
  • Symbol categorization
  • Detailed explanations and examples
  • Multiple difficulty levels
  • Offline learning mode
Features
Read full description

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Master the art of reading and interpreting Piping and Instrumentation Diagrams (P&IDs) with P&ID Trivia! This engaging trivia quiz app is designed for engineers, students, and industry professionals looking to enhance their knowledge of P&ID symbols and their applications. Key Features: Interactive Quizzes: Test your skills with hundreds of questions on P&ID symbols, including valves, instruments, pumps, and more. Symbol Categories: Learn and identify symbols from various categories such as piping, process equipment, instrumentation, and control systems. Learn as You Play: Get detailed explanations and real-world examples after each question to deepen your understanding Multiple Difficulty Levels: Start as a beginner and advance to expert-level challenges. Offline Mode: Learn anytime, anywhere, without the need for an internet connection. Perfect for students, professionals, and anyone working in engineering, manufacturing, or process industries. With P&ID Trivia, you'll gain confidence in reading diagrams and understanding process flows like a pro. Download now and become a P&ID expert! Download Piping and Instrumentation Diagrams (P&IDs) today and see how many like you can identify like: Hand-Operated Gate Valve, Gate Valve, Closed Gate Valve, Hand-Operated Globe Valve, Globe Valve, Rotary Valve, Needel Valve, Control Valve, Piston-Operated Valve, Back Pressure Regulator, Plug or C**k Valve, Check Valve, Butterfly Valve, Flanged Valve, Angle Valve Hand-Operated, Angle Globe Valve, Relief Valve, Angle Valve, Angle Blowdown Valve, Ball, Normally Closed Ball, Diaghragm, Plug Valve, Check Valve, Solenoid Valve, Hydraulic Valve, Motor-Operated Valve, Pilot Gate Valve, Weight Gate Valve, Powered Valve, Float-Operated Valve, Needle Valve, 3-Way Valve, 3-Way Plug Valve, Diaphragm Valve, 4-way Plug Valve, 4-way Valve, Electro-Hydraulic Valve, Balanced Diaphragm Gate Valve, Spring Gate Valve, Ram Valve, Slide Valve, Metering Coke, Knife Valve, Excess Flow Valve, Post Indicator, Self Draining Valve, Pinch Valve, Minimum Flow Valve, Auto Recirculation, Gauge, Bleeder Valve, Integrated Block Valve, Maual Integrated Valve, Orifice, Rotameter, Quarter Turn Valve Double Acting, Quarter Turn Valve Spring Acting, Self-Operating Release Valve, Indicator, Behind Control, On Central Control, On Local Control Pane, Behind a Local Control, Odometer, Pressure Gauge, Flowmeter, Thermometer, Shared Indicator, Displayed Configurable, Computer Indicator, Programmable Indicator, Displayed Programmable Device, Computer, Unit Control Panel, Temp Indicator, Temp Transmitter, Temp Recorder, Temp Controller, Flow Indicator, Flow Transmitter, Flow Recorder, Flow Controller, Level Indicator, Pressure Indicator, Level Transmitter, Level Recorder, Level Controlle, Pressure Transmitter, Pressure Recorder, Pressure Controller, Pressure Indicator, Pressure Recording, Level Alarm, Flow Element, Temperature Element, Level Gauge, Analyzer Transmitter, Transducer, Specialty Item, Sampler, Straightening Vanes, Diaphragm Meter, Rotary Meter, Magnetic, Pitot Tube Type Flow, Pitot Tube, Wedge Meter, Target Meter, Weir Meter, Ultrasonic Meter, V-cone Meter, Venturi Meter, Quick Change, Turbine Meter, Rotometer, Double, Steam Traced, Venturi, Flowmeter, Vortex Sensor, And Gate, Or Gate, Not Gate, Correcting Element, Diamond, Pressure Gauges, Thermometers, Averaging Pitot Tube, Level Meter, Coriolis Flow Sensor, Flow Nozzle Meter, Flume Meter, Manhole, Socket Connection, Support Bracket, Support Leg, Support Ring, Support Skirt, Compressor, Reciprocating Compressor, Compressor silencers, Centrifugal, Rotary Compressor, Rotory Compressor and silencers, Liquid ring Compressor, Centrifugal Compressor, Centrifugal blower, Axial Compressor, Centrifugal pump, Gas blower, Vertical pump, Liquid ring vacuum pump

Screenshots

Mechanical Formula4 screens
P&ID4 screens

Verdict

The call

The clearest difference is update cadence: P&ID at every 2 weeks against Mechanical Formula's every 4 months. Mechanical Formula's advantage is rating (4.7 vs 4.3) and ratings volume (34 vs 6). On price, review sentiment, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Mechanical Formula sells 1 one-off in-app purchase and P&ID sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Mechanical Formula holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Mechanical Formula has 34 ratings behind it against 6, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

Mechanical Formula ships an update every 4 months, P&ID every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
Mechanical Formula versus P&ID: the parameters behind the verdict, then further details
ParameterMechanical FormulaP&ID
PriceFreeFree
Rating4.7 (34 ratings) — better4.3 (6 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings34 — better6
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size42 MB6 MB
Age rating4+4+
DeveloperKantaben GorasiyaForwa Elade Wunde

Customer experience

Mechanical Formula

All ratings34 ratings
Positive91.2%
Neutral2.9%
Negative5.9%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

P&ID

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

Mechanical Formula

One-time1
  • Lifetime$9.99
3 purchases

P&ID

Subscriptions3
  • Month$9.991 Month
  • 6 months$19.996 Months
  • Year$29.991 Year

Questions

Is Mechanical Formula free?
Mechanical Formula is free to download, with in-app purchases available.
Is P&ID free?
P&ID is free to download, with in-app purchases available.
Which has better reviews, Mechanical Formula or P&ID?
Mechanical Formula is rated higher. Mechanical Formula averages 4.7 out of 5 from 34 ratings, while P&ID averages 4.3 from 6 ratings.
Do Mechanical Formula or P&ID have ads?
Neither Mechanical Formula nor P&ID shows ads.
Which is updated more often, Mechanical Formula or P&ID?
Mechanical Formula ships an update every 4 months, and P&ID every 2 weeks. Most recently, Mechanical Formula was updated on November 3, 2026 and P&ID on November 4, 2026.

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