Graycode vs SSI Steel Design
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Graycode
This utility converts numbers between decimal, hexadecimal, binary, and Gray code formats. Changes to one value automatically update the others, making it a convenient tool for engineers. It also features an animated demonstration of the Tower of Hanoi puzzle.
- Decimal, hex, binary, Gray code conversion
- Real-time updates
- Handy calculator for engineers
- Animated Tower of Hanoi solution
- Supports iPhone, iPad, iPod
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This app is used to convert numbers among decimal, hex, binary and gray code. If a user changes any one of these numbers, the other ones will change accordingly. It is a handy calculator for engineers to obtain the binary or gray code values from a decimal, or vise versa. In addition, an animated solution of a Hanoi Tower with three disks is also demonstrated based on the input number.
SSI Steel Design
Easily determine the capacity of structural steel beams and columns. Get detailed calculation sheets to verify your work, designed according to AISC 360-16 standards. Features intuitive touch-based interaction and built-in material databases.
- Determine steel beam and column capacity
- Generate detailed calculation sheets
- Intuitive touch-based design input
- Supports AISC 360-16 standards
- Built-in material databases
- Saves calculation sheets as JPG
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Determine capacity of structural steel beam and column easily and obtain results and calculation sheets to double-check your work!! This is a great tool for civil engineers. You will find it useful to calculate capacity of built-up beam and column. The design is in accordance with the provision of AISC 360-16 which is the latest version of design theory. INTUITIVE TOUCH-BASED INTERACTION Quickly place dimensions of the built-up beam or column, and select the steel grade using a simple graphical design. Out solver algorithm will automatically solve and determine the capacity Immediately see what the maximum capacity of the section and also generate calculation sheet to see the calculation details and procedures simultaneously. The calculation sheet will be in .jpg form and automatically saved into your photo gallery. DOUBLY SYMMETRIC AND SINGLY SYMETRIC SECTION AND BUILT-IN MATERIALS Flexible dimensions can be placed to define the size of the section directly. The built-in databases of materials are also provided, including yield strength of 370 MPa, 420 MPa and 500 MPa CONTACT We want to hear from you!! Issues, questions, or requests? Please contact us via m.me/ssibuildingtechnology
Screenshots
Verdict
Graycode and SSI Steel Design both sit at 3.0 stars, but that hides the real split: 67% of Graycode's written reviews are positive against 0% of SSI Steel Design's. Graycode also leads on in-app purchases (none vs 1) and device support (3 vs 1). SSI Steel Design's advantage is price (Free vs $2.99) and update cadence (every 3 months vs every 10 months). On rating, ratings volume and ads 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
SSI Steel Design is free to download; Graycode costs $2.99 up front. SSI Steel Design sells 1 one-off in-app purchase. Graycode asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 3.0 for Graycode against 3.0 for SSI Steel Design. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews are what separate them: 67% of Graycode's written reviews are positive against 0% of SSI Steel Design's.
Graycode ships an update every 10 months, SSI Steel Design every 3 months. The most recent releases landed on August 26, 2026 and September 10, 2026 respectively.
| Parameter | Graycode | SSI Steel Design |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (2 ratings) | 3.0 (1 ratings) |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 10 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Duo Pisceses, Inc. | Sahaviriya Steel Industries Public Company Limited |
Customer experience
Graycode
SSI Steel Design
In-app purchases
Graycode
No in-app purchases
SSI Steel Design
- Full Report Sheet$12.99
Questions
Is Graycode free?
Is SSI Steel Design free?
Which has better reviews, Graycode or SSI Steel Design?
Do Graycode or SSI Steel Design have ads?
Which is updated more often, Graycode or SSI Steel Design?
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