# Subsurface vs SCUBAzen

The clearest difference is in-app purchases: Subsurface at none against SCUBAzen's 1. Subsurface also leads on ads (none vs shown). SCUBAzen's advantage is update cadence (fortnightly vs every 2 months) and iOS requirement (15.0 vs 17). On price and device support there is nothing between them.

Both are free to download. SCUBAzen sells 1 one-off in-app purchase. Subsurface asks for nothing beyond the download.

Subsurface ships an update every 2 months, SCUBAzen fortnightly. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Subsurface | SCUBAzen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 63.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 52 MB | 79 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [SCUBAzen, LLC](https://appshunter.io/developer/1765417842) |

## 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


### SCUBAzen

[App page](https://appshunter.io/ios/app/scubazen-dive-log-and-trip-prep/id6670226301)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| travel agent · 30 days | $4.99 | one-time |


## Frequently asked questions

### Is Subsurface free?

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

### Is SCUBAzen free?

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

### Do Subsurface or SCUBAzen have ads?

SCUBAzen shows ads; Subsurface does not.

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

Subsurface ships an update every 2 months, and SCUBAzen fortnightly. Most recently, Subsurface was updated on November 2, 2026 and SCUBAzen on November 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.*