# Shock Diamonds vs Comms

The clearest difference is in-app purchases: Shock Diamonds at none against Comms's 12. Comms's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Comms sells 10 in-app purchases, starting at $6.99 per 7 days. Shock Diamonds asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Shock Diamonds | Comms |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (207 ratings)](https://appshunter.io/ios/app/comms-ai-pilot-training/id6749831538/reviews)** |
| Number of ratings | — | **207** |
| Positive reviews | — | 35.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | — | Free with in-app purchases |
| Size | 15 MB | 67 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Viacheslav Gilevich](https://appshunter.io/developer/1541198784) | [KHV Digital LLC](https://appshunter.io/developer/1832344269) |

## What reviewers say

### Shock Diamonds

[App page](https://appshunter.io/ios/app/shock-diamonds/id6749603019)

**Features:** macOS Compatibility

**In-app purchases:** none


### Comms

[App page](https://appshunter.io/ios/app/comms-ai-pilot-training/id6749831538)

Practice realistic air traffic control radio communications using AI and speech recognition. Build confidence with over 35 scenarios, from basic taxi instructions to complex airspace transitions. Get instant feedback on your phraseology and accuracy.

**Highlights:** AI-powered speech recognition, Realistic ATC scenarios, Instant feedback on phraseology, Transcript review, Practice anytime, anywhere, Guided responses

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Comms Premium Weekly | $6.99 | per 7 days |
| Comms Premium Monthly | $14.99 | per month |
| Comms Premium Yearly | $49.99 | per year |
| Comms Premium Yearly | $79.99 | per year |
| Study Guide Private Pilot w/Premium | $9.99 | one-time |
| 25 Scan Credits | $9.99 | one-time |
| Pro - Unlock All Comms | $12.99 | one-time |
| Study Guide Commercial Pilot | $14.99 | one-time |
| 50 Scan Credits | $14.99 | one-time |
| Study Guide Private Pilot | $19.99 | one-time |

**What reviewers like**

- 🚀 Great practice app for student pilots
- 👍 Helpful for improving communication with ATC/Tower
- 💡 Active developers responsive to feedback

**What reviewers complain about**

- 🐛 App is broken and unusable for many users
- 🤖 Not accurate or realistic enough
- 👎 Voice recognition/speech-to-text is poor
- 💰 Paid app with limited value compared to free resources

**Reported bugs**

- App crashes and becomes unusable after account setup
- Incompatible with latest iOS versions
- Provides incorrect information that goes against FAA guidelines

**Requested features**

- More detailed and comprehensive pilot scenarios
- Improved voice recognition and speech-to-text accuracy
- Better alignment with FAA instructions and procedures


## Frequently asked questions

### Is Shock Diamonds free?

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

### Is Comms free?

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

### Do Shock Diamonds or Comms have ads?

Neither Shock Diamonds nor Comms shows ads.

### Which is updated more often, Shock Diamonds or Comms?

Shock Diamonds ships an update every 4 days, and Comms every 4 days. Most recently, Shock Diamonds was updated on September 9, 2026 and Comms on September 23, 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.*