# Signal Deck vs CBDR

The clearest difference is in-app purchases: CBDR at none against Signal Deck's 1. CBDR also leads on ads (none vs shown) and update cadence (weekly vs every 2 weeks). Signal Deck's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Signal Deck sells 1 one-off in-app purchase. CBDR asks for nothing beyond the download.

Signal Deck ships an update every 2 weeks, CBDR weekly. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Signal Deck | CBDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/cbdr/id6792199258/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 54 MB | 72 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Ernest Jessop](https://appshunter.io/developer/1883136323) | [Sean Bowman](https://appshunter.io/developer/6792199260) |

## What reviewers say

### Signal Deck

[App page](https://appshunter.io/ios/app/signal-deck-ics-flag-trainer/id6760197679)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Signal Deck Pro | $0.99 | one-time |


### CBDR

[App page](https://appshunter.io/ios/app/cbdr/id6792199258)

This app trains junior deck officers and watchstanders in essential radar watch skills, including contact evaluation, COLREGS classification, and generating contact reports. It features a live radar scope, generated scenarios for various navigation situations, and drills for recognition and maneuvering.

**Highlights:** Live radar scope with vectors and trails, Generated navigation scenarios, COLREGS classification, Contact report scoring, Maneuvering board drills, Recognition drills, USCG Rules of the Road test bank, Offline group testing

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

**In-app purchases:** none


## Frequently asked questions

### Is Signal Deck free?

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

### Is CBDR free?

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

### Do Signal Deck or CBDR have ads?

Signal Deck shows ads; CBDR does not.

### Which is updated more often, Signal Deck or CBDR?

Signal Deck ships an update every 2 weeks, and CBDR weekly. Most recently, Signal Deck was updated on September 9, 2026 and CBDR on September 18, 2026.

---

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