Comparison

Mechanical Engineer vs D

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

Head to head
About

Mechanical Engineer

This app provides over 300 essential mechanical engineering formulas across various domains. It allows users to calculate, save, compare, and share results, aiding in project optimization and decision-making. Users can access a limited number of calculations for free, with a subscription unlocking full functionality.

Highlights
  • Over 300 mechanical engineering formulas
  • Covers diverse engineering domains
  • Save and compare formula results
  • Share calculation outcomes
  • Intuitive and practical interface
  • Regular updates based on user input
Features
Read full description

MECHANICAL ENGINEER FORMULATOR – Elevate Your Engineering with Precision For the dynamic Mechanical Engineer and the proactive engineering student, MECHANICAL ENGINEER FORMULATOR stands as the definitive tool that merges practicality with ease of use. Navigate through your engineering challenges confidently with an app crafted for direct, intuitive interaction. Boasting a comprehensive collection of over 300 essential mechanical engineering formulas, MECHANICAL ENGINEER FORMULATOR actively supports a wide array of mechanical engineering domains: • Actuators & Bearings: Execute precision movements and manage loads with authority. • Belts & Boilers: Transmit power efficiently and generate steam reliably. • Brakes & Clutches: Apply stopping power decisively and control torque with finesse. • Elevators & Gears: Operate smoothly and transfer motions effectively. • Fluid Power & Heat Transfer: Control fluids masterfully and manage thermal dynamics skillfully. • Internal Combustion & Kinetic Energy: Generate power robustly and analyze motion with precision. • Metalworking & Plates: Shape materials skillfully and ensure structural integrity. • Plumbs & Power Plants: Direct fluid systems confidently and produce energy proficiently. • Refrigeration & Shafts: Cool systems effectively and rotate components seamlessly. • Springs & Vehicle Drive: Store energy reliably and propel vehicles powerfully. MECHANICAL ENGINEER FORMULATOR empowers you to save and compare formula results, enhancing decision-making for project optimization. Share your formula outcomes effortlessly, enabling seamless collaboration. Given the ever-advancing nature of engineering, we pledge to move forward together with you. If you are looking for a formula not yet featured, or desire an enhancement, just email us. We are committed to listening and incorporating your input into our forthcoming updates. MECHANICAL ENGINEER FORMULATOR is not just an app; it's an essential resource to achieve engineering excellence. MECHANICAL ENGINEER FORMULATOR places the full potential of precision engineering at your fingertips. MECHANICAL ENGINEER FORMULATOR is FREE to DOWNLOAD and view all of the formulas. Users are able to calculate five formulas for FREE. Purchase a subscription to calculate additional formulas. All subscriptions come with a 1-WEEK FREE TRIAL and SUPPORT Family Sharing.

About

D

Features
Read full description

· Your digital assistant for ship management! It integrates features like BOSS dashboard, energy efficiency management, route optimization, Prognostics and Health Management, planned maintenance, smart warehousing, ship safety inspection, E-log, D-Knowledge, system management, crew management, and budget management. · A wealth of pre-configured information, integrating essential technical documents for a one-stop service product that's ready to use right away. · Utilizing technologies such as IoT, edge computing, AR, and AI to build a highly intelligent ship management platform. · Shore-ship data synchronization, transparent processes, real-time management of ship dynamics, balancing efficiency and management. · A free software solution for everyone, offering a management tool for mariners at no cost.

Screenshots

Mechanical Engineer4 screens
D3 screens

Verdict

The call

The clearest difference is in-app purchases: D at none against Mechanical Engineer's 3. D also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads and device support 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 Engineer sells 3 in-app purchases, starting at $0.99 per month. D asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 13, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Mechanical Engineer versus D: the parameters behind the verdict, then further details
ParameterMechanical EngineerD
PriceFreeFree
Rating4.4 (8 ratings) — better—
Positive reviews30.8% of reviews—
Number of ratings8 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size5 MB15 MB
Age rating4+4+
DeveloperHistorycentral.comWinkong Marine Engineering Co.,Ltd.

In-app purchases

3 purchases

Mechanical Engineer

Subscriptions3
  • Monthly Subscription7 Days trial$0.991 Month
  • Pro Quarterly$0.993 Months
  • Pro Yearly7 Days trial$2.991 Year
None

D

No in-app purchases

Questions

Is Mechanical Engineer free?
Mechanical Engineer is free to download, with in-app purchases available.
Is D free?
D is free to download, with no in-app purchases.
Do Mechanical Engineer or D have ads?
Neither Mechanical Engineer nor D shows ads.
Which is updated more often, Mechanical Engineer or D?
Mechanical Engineer ships an update every 2 months, and D every 2 months. Most recently, Mechanical Engineer was updated on August 13, 2026 and D on September 18, 2026.

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