# ST vs DigiDecoder

The clearest difference is rating: ST at 5.0 against DigiDecoder's 4.5. ST also leads on in-app purchases (none vs 3) and iOS requirement (12.0 vs 17.0). DigiDecoder's advantage is update cadence (every 5 days vs every 27 months). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. DigiDecoder sells 3 in-app purchases, starting at $2.99 per month. ST asks for nothing beyond the download.

ST holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

ST ships an update every 27 months, DigiDecoder every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | ST | DigiDecoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/st-4001i/id1492225169/reviews)** | [4.5 (8 ratings)](https://appshunter.io/ios/app/digidecoder-ham-radio/id6759073503/reviews) |
| Number of ratings | 4 | **8** |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 14 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [ICOM INCORPORATED](https://appshunter.io/developer/1193842631) | [Lukasz Skierkowski](https://appshunter.io/developer/1280847319) |

## What reviewers say

### ST

[App page](https://appshunter.io/ios/app/st-4001i/id1492225169)

This app converts photos and images into a format compatible with D-STAR transceivers for the Share Picture function. Users can crop images, add text like call signs, and transfer them wirelessly or via Bluetooth to supported transceivers.

**Highlights:** Image conversion for D-STAR Share Picture, Image cropping, Add text (call signs), Wireless transfer to transceiver, Bluetooth transfer to transceiver, Save cropped image as file

**Features:** macOS Compatibility

**In-app purchases:** none


### DigiDecoder

[App page](https://appshunter.io/ios/app/digidecoder-ham-radio/id6759073503)

This application decodes and encodes various ham radio digital modes in real-time. It automatically recognizes signals, displays them with an animated waterfall, and supports sending SSTV images, CW, FT8, and Packet messages.

**Highlights:** Real-time digital mode decoding, Automatic signal recognition, Animated waterfall display, SSTV image encoding, CW, FT8, and Packet message encoding, Bluetooth and network TNC support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DigiDecoder Monthly | $2.99 | per month |
| DigiDecoder Trial | Free | one-time |
| DigiDecoder Lifetime | $8.99 | one-time |


## Frequently asked questions

### Is ST free?

ST is free to download, with no in-app purchases.

### Is DigiDecoder free?

DigiDecoder is free to download, with in-app purchases available.

### Which has better reviews, ST or DigiDecoder?

ST is rated higher. ST averages 5.0 out of 5 from 4 ratings, while DigiDecoder averages 4.5 from 8 ratings.

### Do ST or DigiDecoder have ads?

Neither ST nor DigiDecoder shows ads.

### Which is updated more often, ST or DigiDecoder?

ST ships an update every 27 months, and DigiDecoder every 5 days. Most recently, ST was updated on October 24, 2026 and DigiDecoder on October 24, 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.*