Steel vs Drafting Utility
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Steel
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Created by a senior structural engineer. 10+ years building intuitive tools from real-world experience. Quick check of section data of various types of steel and section steel combination, including section steel model, section size, section area, theoretical weight and section characteristics, which comply with the current Chinese national standards. Application characteristics: 1. the interface design is simple and intuitive, the function is clear and easy to use. No network traffic consumption; 2. the input adapts to the characteristics of the mobile phone in a variety of ways: stepper, segment selector, roller selector... Convenient and fast; 3. the most commonly used section steel is selected. The use of rollers is convenient, fast, interesting and has a first-class feel; 4. the data are collected from the current national standards and specifications, timely, accurate and detailed; 5. the detailed size of the section is marked in situ in the attached drawing, which is clear at a glance; 6. each type of profile steel has a user-defined page to facilitate the query of non-standard profile steel; 7. special numeric keypad, convenient and fast input; 8. native application, small installation size, does not occupy valuable storage space of mobile phone. If you have any questions or suggestions, please put forward them in the Appstore comments or use the following contact information. Weibo: @结构设计App Email: lrtjqn@icloud.com Official website: https://www.luckybianbian.top
Drafting Utility
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TriangleCalc is a simple calculator that calculates the lengths and angles of the sides of a triangle. By entering two values, the other values are automatically calculated.
Screenshots
Verdict
The clearest difference is in-app purchases: Drafting Utility at none against Steel's 1. Drafting Utility also leads on update cadence (daily vs every 4 months). On price, ads, device support and iOS requirement 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. Steel sells 1 one-off in-app purchase. Drafting Utility asks for nothing beyond the download.
Steel ships an update every 4 months, Drafting Utility daily. The most recent releases landed on November 6, 2026 and October 25, 2026 respectively.
| Parameter | Steel | Drafting Utility |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 63.6% of reviews | — |
| Update frequency | Every 4 months | Daily — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.6 — better |
| Further details — not scored | ||
| Size | 12 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | 疆 边 | Masaharu Tsukamoto |
In-app purchases
Steel
- 完整版$3.99
Drafting Utility
No in-app purchases
Questions
Is Steel free?
Is Drafting Utility free?
Do Steel or Drafting Utility have ads?
Which is updated more often, Steel or Drafting Utility?
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