# Subsurface vs iScubaSites

Subsurface and iScubaSites both sit at 4.5 stars, but that hides the real split: 80% of iScubaSites's written reviews are positive against 63% of Subsurface's. Subsurface's advantage is ratings volume (48 vs 8) and iOS requirement (17 vs 26.0). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.5 for Subsurface against 4.4 for iScubaSites. That said, the two scores are not equally well evidenced: Subsurface has 48 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 63% of Subsurface's written reviews are positive against 80% of iScubaSites's.

Subsurface ships an update every 2 months, iScubaSites every 6 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Subsurface | iScubaSites |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/iscubasites/id1273730297/reviews) |
| Number of ratings | **48** | 8 |
| Positive reviews | 63.3% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 52 MB | 3 MB |
| Requires iOS | **17** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Arie Guttman](https://appshunter.io/developer/1029107890) |

## 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


### iScubaSites

[App page](https://appshunter.io/ios/app/iscubasites/id1273730297)

Discover scuba diving locations globally with this user-friendly app. Simply search a region to find available dive sites and access detailed information when provided. Explore the underwater world with ease.

**Highlights:** Worldwide diving site information, Location-based search, Detailed dive site information, Simple and intuitive interface, Explore underwater locations

**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 iScubaSites free?

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

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

Subsurface is rated higher. Subsurface averages 4.5 out of 5 from 48 ratings, while iScubaSites averages 4.4 from 8 ratings.

### Do Subsurface or iScubaSites have ads?

Neither Subsurface nor iScubaSites shows ads.

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

Subsurface ships an update every 2 months, and iScubaSites every 6 weeks. Most recently, Subsurface was updated on November 2, 2026 and iScubaSites on November 3, 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.*