# myPSS vs Subsurface

The clearest difference is rating: myPSS at 5.0 against Subsurface's 4.5. myPSS also leads on iOS requirement (15.1 vs 17). Subsurface's advantage is update cadence (every 2 months vs every 42 months) and ratings volume (48 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

myPSS holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Subsurface has 48 ratings behind it against 1, so its average is the more settled of the two.

myPSS ships an update every 42 months, Subsurface every 2 months. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | myPSS | Subsurface |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mypss/id904666792/reviews)** | [4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews) |
| Number of ratings | 1 | **48** |
| Positive reviews | — | 63.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 64 MB | 52 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Margherita Aucelli](https://appshunter.io/developer/904666795) | [Dirk Hohndel](https://appshunter.io/developer/1093217160) |

## What reviewers say

### myPSS

[App page](https://appshunter.io/ios/app/mypss/id904666792)

This application serves as a dedicated platform for members and instructors of PSS. It provides a centralized hub for information and communication within the PSS community.

**Highlights:** Dedicated platform for PSS members, Dedicated platform for PSS instructors, Centralized information hub, Community communication tool

**Features:** macOS Compatibility, Vision Pro support

**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 myPSS free?

myPSS 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, myPSS or Subsurface?

myPSS is rated higher. myPSS averages 5.0 out of 5 from 1 ratings, while Subsurface averages 4.5 from 48 ratings.

### Do myPSS or Subsurface have ads?

Neither myPSS nor Subsurface shows ads.

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

myPSS ships an update every 42 months, and Subsurface every 2 months. Most recently, myPSS was updated on October 4, 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.*