# SSI Steel Design vs FT8 Decoder

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.

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.

## The numbers

| Metric | SSI Steel Design | FT8 Decoder |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/ssi-steel-design/id1474838160/reviews) | **[4.3 (8 ratings)](https://appshunter.io/ios/app/ft8-decoder/id1592847401/reviews)** |
| Number of ratings | 1 | **8** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 18 months |
| Monetization | **Free** | Paid |
| Size | 23 MB | 1 MB |
| Requires iOS | 18.6 | **15.4** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sahaviriya Steel Industries Public Company Limited](https://appshunter.io/developer/1474838159) | [HotPaw Productions](https://appshunter.io/developer/285074853) |

## What reviewers say

### SSI Steel Design

[App page](https://appshunter.io/ios/app/ssi-steel-design/id1474838160)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Report Sheet | $12.99 | one-time |


### FT8 Decoder

[App page](https://appshunter.io/ios/app/ft8-decoder/id1592847401)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is SSI Steel Design free?

SSI Steel Design is free to download, with in-app purchases available.

### Is FT8 Decoder free?

FT8 Decoder costs $1.99, with no in-app purchases.

### Which has better reviews, SSI Steel Design or FT8 Decoder?

FT8 Decoder is rated higher. SSI Steel Design averages 3.0 out of 5 from 1 ratings, while FT8 Decoder averages 4.3 from 8 ratings.

### Do SSI Steel Design or FT8 Decoder have ads?

Neither SSI Steel Design nor FT8 Decoder shows ads.

### Which is updated more often, SSI Steel Design or FT8 Decoder?

SSI Steel Design ships an update every 3 months, and FT8 Decoder every 18 months. Most recently, SSI Steel Design was updated on September 10, 2026 and FT8 Decoder on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*