# Subsurface vs Dive Converter

The clearest difference is price: Subsurface at Free against Dive Converter's $1.99. Subsurface also leads on rating (4.5 vs 4.0) and ratings volume (48 vs 5). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Subsurface is free to download; Dive Converter costs $1.99 up front. 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. That said, the two scores are not equally well evidenced: Subsurface has 48 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 63% of Subsurface's written reviews are positive against 67% of Dive Converter'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 September 18, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Subsurface | Dive Converter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/dive-converter/id6446218356/reviews) |
| Number of ratings | **48** | 5 |
| Positive reviews | 63.3% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 52 MB | 9 MB |
| Requires iOS | **17** | 18.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Carsten Heinelt](https://appshunter.io/developer/1676741637) |

## 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


### Dive Converter

[App page](https://appshunter.io/ios/app/dive-converter/id6446218356)

Easily export your dive logs from Oceanic+ and SSI/mares into the Universal Dive Data Format (UDDF). This app translates dive information accurately and supports importing third-party UDDF files. It also offers features like reverse geocoding for dive locations and surface time calculation.

**Highlights:** Export Oceanic+ and SSI/mares dives to UDDF, Reverse geocoding for dive locations, Calculate surface time, Backup and restore dives, Import third-party UDDF files, Filter and merge dives

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Subsurface free?

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

### Is Dive Converter free?

Dive Converter costs $1.99, with no in-app purchases.

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

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

### Do Subsurface or Dive Converter have ads?

Neither Subsurface nor Dive Converter shows ads.

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

Subsurface ships an update every 2 months, and Dive Converter every 2 months. Most recently, Subsurface was updated on September 18, 2026 and Dive Converter on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*