# Subsurface vs Deepblu

The clearest difference is rating: Subsurface at 4.5 against Deepblu's 2.9. Subsurface also leads on review sentiment (63% vs 34%). Deepblu's advantage is update cadence (monthly vs every 2 months) and iOS requirement (15.0 vs 17). 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.

Subsurface holds the better App Store score, 4.5 against 2.9. Both are backed by a comparable volume of ratings — 48 and 39 respectively. Written reviews point the same way: 63% of Subsurface's written reviews are positive against 34% of Deepblu's.

Subsurface ships an update every 2 months, Deepblu monthly. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Subsurface | Deepblu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** | [2.9 (39 ratings)](https://appshunter.io/ios/app/deepblu-scuba-dive-log/id1093357370/reviews) |
| Number of ratings | **48** | 39 |
| Positive reviews | **63.3% of reviews** | 34.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 52 MB | 90 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Blaris ApS](https://appshunter.io/developer/1870014114) |

## 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


### Deepblu

[App page](https://appshunter.io/ios/app/deepblu-scuba-dive-log/id1093357370)

Log your underwater adventures, enrich them with media, and connect with a global diving community. Automatically sync dive data from compatible computers and discover popular dive destinations worldwide. Build your diver profile and get your logs certified by instructors.

**Highlights:** Automatic dive log synchronization, Add photos and videos to logs, Discover and plan dive destinations, Build diver identity and profile, Instructor certification of logs, Compatible with many dive computers

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

**In-app purchases:** none


## Frequently asked questions

### Is Subsurface free?

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

### Is Deepblu free?

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

### Which has better reviews, Subsurface or Deepblu?

Subsurface is rated higher. Subsurface averages 4.5 out of 5 from 48 ratings, while Deepblu averages 2.9 from 39 ratings.

### Do Subsurface or Deepblu have ads?

Neither Subsurface nor Deepblu shows ads.

### Which is updated more often, Subsurface or Deepblu?

Subsurface ships an update every 2 months, and Deepblu monthly. Most recently, Subsurface was updated on October 14, 2026 and Deepblu on October 18, 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.*