SSI Steel Design vs FT8 Decoder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
FT8 Decoder
This application decodes FT8 digital signals from amateur radio bands. It can process audio from external sources or directly from an SSB radio or SDR. The app also generates FT8 modulated audio for experimentation.
- Decodes FT8 8FSK modulated signals
- Processes external audio or SDR sound
- Supports standard callsigns and 13-character messages
- Generates FT8 message audio
- Experiment with sending and receiving FT8 audio
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An FT8 decoder. FT8 is a weak signal digital mode, currently very popular in the amateur radio HF shortwave bands. The ft8d app allows decoding FT8 8FSK modulated signals contained in externally provided audio or sound from an SSB radio or SDR. The app supports Level 1 decoding of messages with standard callsigns or 13 character free text messages. The app can also generate standard FT8 message audio, so can be used to experiment with sending and receiving FT8 encoded and modulated audio. The app does NOT perform Auto-sequencing, or decode long hashed callsigns.
Screenshots
Verdict
The clearest difference is review sentiment: FT8 Decoder at 50% against SSI Steel Design's 0%. FT8 Decoder also leads on rating (4.3 vs 3.0) and in-app purchases (none vs 1). SSI Steel Design's advantage is price (Free vs $1.99) and update cadence (every 3 months vs every 18 months). On 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
SSI Steel Design is free to download; FT8 Decoder costs $1.99 up front. SSI Steel Design sells 1 one-off in-app purchase. FT8 Decoder asks for nothing beyond the download.
FT8 Decoder holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: FT8 Decoder has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of SSI Steel Design's written reviews are positive against 50% of FT8 Decoder's.
SSI Steel Design ships an update every 3 months, FT8 Decoder every 18 months. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.
| Parameter | SSI Steel Design | FT8 Decoder |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 3.0 (1 ratings) | 4.3 (8 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 1 | 8 — better |
| Update frequency | Every 3 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.6 | 15.4 — better |
| Further details — not scored | ||
| Size | 23 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Sahaviriya Steel Industries Public Company Limited | HotPaw Productions |
Customer experience
SSI Steel Design
FT8 Decoder
In-app purchases
SSI Steel Design
- Full Report Sheet$12.99
FT8 Decoder
No in-app purchases
Questions
Is SSI Steel Design free?
Is FT8 Decoder free?
Which has better reviews, SSI Steel Design or FT8 Decoder?
Do SSI Steel Design or FT8 Decoder have ads?
Which is updated more often, SSI Steel Design or FT8 Decoder?
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