# Dive Diary vs Subsurface

The clearest difference is rating: Subsurface at 4.5 against Dive Diary's 4.0. Dive Diary's advantage is review sentiment (90% vs 63%) and iOS requirement (13.0 vs 17). On price, ratings volume, update cadence and ads 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 4.0. Both are backed by a comparable volume of ratings — 19 and 48 respectively. Written reviews complicate that: 90% of Dive Diary'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. Both last shipped on September 18, 2026.

## The numbers

| Metric | Dive Diary | Subsurface |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (19 ratings)](https://appshunter.io/ios/app/dive-diary/id732855199/reviews) | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** |
| Number of ratings | 19 | **48** |
| Positive reviews | **90.0% of reviews** | 63.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 25 MB | 52 MB |
| Requires iOS | **13.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Goanmook Choi](https://appshunter.io/developer/732855202) | [Dirk Hohndel](https://appshunter.io/developer/1093217160) |

## What reviewers say

### Dive Diary

[App page](https://appshunter.io/ios/app/dive-diary/id732855199)

This app serves as a digital logbook for scuba divers, allowing users to record their dives with a visually appealing, customizable interface. It supports unlimited photo and video attachments, cloud backup, and easy sharing of dive logs.

**Highlights:** Customizable logbook design, Unlimited photo/video attachments, Cloud backup and restore, Cross-device synchronization, Social media sharing, Import Suunto dive computer logs, Export logs to CSV

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Dive Diary free?

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

### Is Subsurface free?

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

### Which has better reviews, Dive Diary or Subsurface?

Subsurface is rated higher. Dive Diary averages 4.0 out of 5 from 19 ratings, while Subsurface averages 4.5 from 48 ratings.

### Do Dive Diary or Subsurface have ads?

Neither Dive Diary nor Subsurface shows ads.

### Which is updated more often, Dive Diary or Subsurface?

Dive Diary ships an update every 2 months, and Subsurface every 2 months. Most recently, Dive Diary was updated on September 18, 2026 and Subsurface on September 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.*