# Subsurface vs Scuba Dive Signals

The clearest difference is review sentiment: Scuba Dive Signals at 100% against Subsurface's 63%. Scuba Dive Signals also leads on rating (5.0 vs 4.5) and iOS requirement (15.0 vs 17). Subsurface's advantage is update cadence (every 2 months vs every 42 months) and ratings volume (48 vs 3). On price, ads, in-app purchases and monetization model 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 4.5. That said, the two scores are not equally well evidenced: Subsurface has 48 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 63% of Subsurface's written reviews are positive against 100% of Scuba Dive Signals's.

Subsurface ships an update every 2 months, Scuba Dive Signals every 42 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Subsurface | Scuba Dive Signals |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/scuba-dive-signals/id1483856571/reviews)** |
| Number of ratings | **48** | 3 |
| Positive reviews | 63.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 42 months |
| Monetization | Free | Free |
| Size | 52 MB | 3 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Eric Hamiter](https://appshunter.io/developer/1482332471) |

## What reviewers say

### Subsurface

[App page](https://appshunter.io/ios/app/subsurface-mobile/id1093217161)

This application allows divers to manage their dive logs on their mobile devices. It supports editing dive data and downloading new information from compatible dive computers. Optional cloud synchronization is available for seamless data transfer with desktop versions.

**Highlights:** Mobile dive log management, Edit dive data, Download from Bluetooth LE dive computers, Optional cloud synchronization, Open-source and free

**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 Subsurface free?

Subsurface 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, Subsurface or Scuba Dive Signals?

Scuba Dive Signals is rated higher. Subsurface averages 4.5 out of 5 from 48 ratings, while Scuba Dive Signals averages 5.0 from 3 ratings.

### Do Subsurface or Scuba Dive Signals have ads?

Neither Subsurface nor Scuba Dive Signals shows ads.

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

Subsurface ships an update every 2 months, and Scuba Dive Signals every 42 months. Most recently, Subsurface was updated on October 14, 2026 and Scuba Dive Signals on October 8, 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.*