# Diving logbook vs Subsurface

The clearest difference is in-app purchases: Subsurface at none against Diving logbook's 3. Subsurface also leads on rating (4.5 vs 4.2). Diving logbook's advantage is review sentiment (76% vs 63%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Diving logbook sells 3 in-app purchases, starting at $1.99 per month. Subsurface asks for nothing beyond the download.

Subsurface holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 96 and 48 respectively. Written reviews complicate that: 76% of Diving logbook's written reviews are positive against 63% of Subsurface's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Diving logbook | Subsurface |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (96 ratings)](https://appshunter.io/ios/app/diving-logbook-dive-number/id949480835/reviews) | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** |
| Number of ratings | **96** | 48 |
| Positive reviews | **76.1% of reviews** | 63.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 71 MB | 52 MB |
| Requires iOS | 17.6 | **17** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Denys Dykusha](https://appshunter.io/developer/930478942) | [Dirk Hohndel](https://appshunter.io/developer/1093217160) |

## What reviewers say

### Diving logbook

[App page](https://appshunter.io/ios/app/diving-logbook-dive-number/id949480835)

Easily record your scuba dives with an unlimited logbook. Track dive sites, conditions, equipment, and personal notes. Connect with dive partners and view comprehensive statistics.

**Highlights:** Unlimited dive entries, Extensive dive site database, Detailed dive condition logging, Equipment and gas tracking, Dive partner confirmation, Comprehensive dive statistics, User-added dive sites

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| support DiveNumber every month | $1.99 | per month |
| support DiveNumber every year | $1.99 | per year |
| support Dive Number one time | $4.99 | one-time |


### 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


## Frequently asked questions

### Is Diving logbook free?

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

### Is Subsurface free?

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

### Which has better reviews, Diving logbook or Subsurface?

Subsurface is rated higher. Diving logbook averages 4.2 out of 5 from 96 ratings, while Subsurface averages 4.5 from 48 ratings.

### Do Diving logbook or Subsurface have ads?

Neither Diving logbook nor Subsurface shows ads.

### Which is updated more often, Diving logbook or Subsurface?

Diving logbook ships an update every 2 months, and Subsurface every 2 months. Most recently, Diving logbook was updated on October 17, 2026 and Subsurface on October 14, 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.*