DoD Systems Engineering vs Structural SteelBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DoD Systems Engineering
This app serves as a pocket reference for the Department of Defense Systems Engineering Technical Review process. It offers definitions for nearly 250 acronyms, details on Technology Readiness Levels, and in-depth information on review phases and technical processes.
- Acronym lookup (250+ definitions)
- Technology Readiness Level definitions
- Review information by phase
- Phase details (Materiel Solutions Analysis to Operations & Support)
- Technical and technical management processes
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This app provides a handy pocket reference for engineers and logisticians involved in the very complex Department of Defense Systems Engineering Technical Review process. Features include: *Acronym lookup - nearly 250 acronyms defined! *Technology Readiness Level definitions *In-depth review information sorted by phases *In-depth phase information, from Materiel Solutions Analysis through Operations and Support *Comprehensive Information on technical and technical management processes All ThinChip Software apps are now available free of charge.
Structural SteelBook
Access a comprehensive reference for structural steel shapes, including multiple AISC library versions. Easily switch between imperial and metric units, sort sections, and perform quick searches. Print or share section properties and cross-sections.
- Multiple AISC library versions (v15, v13, v14, LRFD, ASD)
- Imperial and metric unit switching
- Sort sections by property
- Quick search for steel sections
- Side-by-side imperial/metric equivalencies
- Print and share section properties
- Dark/light mode and dynamic type support
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The best Structural Steel reference on app store! Now for iPhone, iPad & Mac! Buy once, run on all your devices, no in-app purchases / limited features gimmicks! From the developer of [steel shapes], the highest rated Structural Steel app since 2009. Now with the latest AISC v15 library, more than 20000 steel entries in 19 libraries & MANY new features. SteelBook contains the latest (v15), previous (ASD 5 - 9, LRFD 1 - 3, v13, v14, v14.1) and HISTORIC American Institute of Steel Construction's Structural Steel Databases in a fast, easy to use interface. LIBRARIES: ---------------------------------------- AISC LIBRARIES: - Current version 15 & 15-SI (NEW!) - Versions 13.2 & 13.2 SI, 13.1.1, 13.1.1 SI, 13, v14 & v14-SI, v14.1 & v14.1-SI - LRFD 1st through 3rd Ed. - ASD 5th through 9th Ed. - HISTORIC UNIT SYSTEM SWITCHING: ---------------------------------------- Properties can be displayed in either the original English units or converted to metric with the tap of a button (libraries 13.2 & newer) SORTING: ---------------------------------------- Sort sections within a library given a specific property in ascending / descending order. QUICK SEARCH: ---------------------------------------- SteelBook also lets you find a section with a quick search function, where, for example, "W16 x 89", "W16x89" or simply "W1689" will locate the same section or its closest approximation. NEW! SIDE BY SIDE EQUIVALENCIES ---------------------------------------- Display Equivalent Imperial / Metric designations side by side while browsing NEW! FRACTIONAL DETAILING VALUES, PROPERTIES & UNITS ---------------------------------------- For library version 15, support for v14 coming soon NEW! PRINT & SHARE ---------------------------------------- Print a section's properties & cross section or Share as a PDF NEW! DARK / LIGHT MODE & DYNAMIC TYPE SUPPORT ---------------------------------------- SteelBook's UI adapts to your device's setting, whether you prefer Dark, Light or adaptive color scheme, SteelBook will naturally adapt to it. Also new is Dynamic type support, SteelBook will adapt its interface to your device's accessibility settings. NEW! UNIVERSAL APP, BUY ONCE, RUN EVERYWHERE ———————————————————— The Steel app for the next decade, run on iOS/iPad (iOS/iPad OS 16 and newer) and on MacOS (10.13 / Ventura). ***************************************** visit us at: www.TheMobileEngineer.com
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Verdict
The clearest difference is review sentiment: DoD Systems Engineering at 50% against Structural SteelBook's 0%. DoD Systems Engineering also leads on price (Free vs $4.99). Structural SteelBook's advantage is rating (4.7 vs 3.8) and update cadence (every 3 days vs every 5 months). On ratings volume, 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
DoD Systems Engineering is free to download; Structural SteelBook costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Structural SteelBook holds the better App Store score, 4.7 against 3.8. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews complicate that: 50% of DoD Systems Engineering's written reviews are positive against 0% of Structural SteelBook's, so the app with the better star average is not the one people write more warmly about.
DoD Systems Engineering ships an update every 5 months, Structural SteelBook every 3 days. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.
| Parameter | DoD Systems Engineering | Structural SteelBook |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 3.8 (4 ratings) | 4.7 (6 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 | 6 — better |
| Update frequency | Every 5 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Russell Shannon | David Homes |
Customer experience
DoD Systems Engineering
Structural SteelBook
In-app purchases
DoD Systems Engineering
No in-app purchases
Structural SteelBook
No in-app purchases
Questions
Is DoD Systems Engineering free?
Is Structural SteelBook free?
Which has better reviews, DoD Systems Engineering or Structural SteelBook?
Do DoD Systems Engineering or Structural SteelBook have ads?
Which is updated more often, DoD Systems Engineering or Structural SteelBook?
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