# Alert Diver vs Scuba Dive Signals

The clearest difference is review sentiment: Scuba Dive Signals at 100% against Alert Diver's 25%. Scuba Dive Signals also leads on rating (5.0 vs 4.0) and monetization model (free vs free with in-app purchases). Alert Diver's advantage is update cadence (every 6 months vs every 42 months) and iOS requirement (11.0 vs 15.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scuba Dive Signals holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 25% of Alert Diver's written reviews are positive against 100% of Scuba Dive Signals's.

Alert Diver ships an update every 6 months, Scuba Dive Signals every 42 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Alert Diver | Scuba Dive Signals |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/alert-diver/id480608662/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/scuba-dive-signals/id1483856571/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 42 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 92 MB | 3 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Divers Alert Network](https://appshunter.io/developer/1482122935) | [Eric Hamiter](https://appshunter.io/developer/1482332471) |

## What reviewers say

### Alert Diver

[App page](https://appshunter.io/ios/app/alert-diver/id480608662)

Explore dive industry insights, research, and safety information. Discover underwater photography, travel destinations, and marine environmental topics. This app provides valuable content for divers and enthusiasts.

**Highlights:** Dive industry research, Medical information, Dive safety guidelines, Underwater photography, Dive travel guides, Marine environmental topics

**Features:** macOS Compatibility

**In-app purchases:** none


### Scuba Dive Signals

[App page](https://appshunter.io/ios/app/scuba-dive-signals/id1483856571)

Access a comprehensive list of underwater hand signals for safe scuba diving communication. Includes a quiz feature to test your knowledge of signals recognized by major training agencies.

**Highlights:** List of recognized dive hand signals, Signals from PADI, NAUI, SSI, Quiz feature to test knowledge, Safety communication focus, Creative Commons licensed images

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Alert Diver free?

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

### Is Scuba Dive Signals free?

Scuba Dive Signals is free to download, with no in-app purchases.

### Which has better reviews, Alert Diver or Scuba Dive Signals?

Scuba Dive Signals is rated higher. Alert Diver averages 4.0 out of 5 from 4 ratings, while Scuba Dive Signals averages 5.0 from 3 ratings.

### Do Alert Diver or Scuba Dive Signals have ads?

Neither Alert Diver nor Scuba Dive Signals shows ads.

### Which is updated more often, Alert Diver or Scuba Dive Signals?

Alert Diver ships an update every 6 months, and Scuba Dive Signals every 42 months. Most recently, Alert Diver was updated on November 6, 2026 and Scuba Dive Signals on November 3, 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.*