CSiSections vs mechanical design engine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CSiSections
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CSiSections is an app that conveniently computes the structural properties of cross-sections of more than 25 shapes. CSiSections is an essential tool for engineers who quickly need the properties of commonly used sections and also for students who want to learn about the calculation procedures for structural properties of various sections. Application / Usage: • Define geometry of parametric cross-sections • Conveniently computes structural properties of simple and complex structural cross-sections Target Users: • Engineers who need structural properties of commonly used sections quickly • Students and teachers who want to know the structural properties of various cross-sections and calculation procedures Key Features: • More than 25 parametric sections, 6 shape categories to choose from • Responsive graphics • Detailed calculation reports Key Input: • Section type, dimensions Key Output: • Basic properties: Area, inertia, radius of gyration, section modulus • Advanced properties: Shear area, torsional constant • Principal properties: Principal angle, principal moment of inertia
mechanical design engine
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* To calculate basic thickness of cylindrical/rectangular pressure vessel including heads if input data such as pressure, temperature, inner diameter and material information. * flange data can be easily searched. * Profile steel information such as pipe, H, W, I and U-Beam. * Raw material information, that is chemical composition and mechanical properties, for example, ASTM A240 316L, EN10297-1, SUS316L and so on. * Size and shape information of every thread(iso/unf/pf/pt) and shackles(bow/d-type) * To calculate force and moment of solid mechanics according to support type.
Screenshots
Verdict
The clearest difference is update cadence: CSiSections at monthly against mechanical design engine's every 2 months. CSiSections also leads on iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CSiSections ships an update monthly, mechanical design engine every 2 months. The most recent releases landed on August 22, 2026 and September 8, 2026 respectively.
| Parameter | CSiSections | mechanical design engine |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 12 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Computers and Structures, Inc. | gan dae choi |
In-app purchases
CSiSections
No in-app purchases
mechanical design engine
No in-app purchases
Questions
Is CSiSections free?
Is mechanical design engine free?
Do CSiSections or mechanical design engine have ads?
Which is updated more often, CSiSections or mechanical design engine?
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