# myPSS vs Deep Tools

The clearest difference is in-app purchases: myPSS at none against Deep Tools's 3. myPSS also leads on rating (5.0 vs 4.6) and iOS requirement (15.1 vs 17.0). Deep Tools's advantage is update cadence (every 2 months vs every 42 months) and ratings volume (93 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Deep Tools sells 3 in-app purchases, starting at $7.99 per month. myPSS asks for nothing beyond the download.

myPSS holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Deep Tools has 93 ratings behind it against 1, so its average is the more settled of the two.

myPSS ships an update every 42 months, Deep Tools every 2 months. Both last shipped on November 13, 2026.

## The numbers

| Metric | myPSS | Deep Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mypss/id904666792/reviews)** | [4.6 (93 ratings)](https://appshunter.io/ios/app/deep-tools/id1476093876/reviews) |
| Number of ratings | 1 | **93** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 2 months** |
| Monetization | **Free** | Freemium |
| Size | 64 MB | 13 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Margherita Aucelli](https://appshunter.io/developer/904666795) | [Deep Blue d.o.o.](https://appshunter.io/developer/1476093875) |

## 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


### Deep Tools

[App page](https://appshunter.io/ios/app/deep-tools/id1476093876)

This app is a comprehensive tool for divers, offering dive planning, logging, and gas blending. It supports recreational, technical, and rebreather diving with advanced decompression planning and dive computer integration. Plan complex dives, log your adventures, and mix gases with precision.

**Highlights:** Decompression dive planning (Bühlmann ZH-L16), Dive log with Shearwater import, Nitrox and Trimix gas blending, Multiple dive calculators, Metric and imperial unit support, Multi-level and repetitive dive planning

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Monthly | $7.99 | per month |
| Subscription Yearly | $22.99 | per year |
| Lifetime Subscription | $49.99 | one-time |


## Frequently asked questions

### Is myPSS free?

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

### Is Deep Tools free?

Deep Tools is free to download, with in-app purchases available.

### Which has better reviews, myPSS or Deep Tools?

myPSS is rated higher. myPSS averages 5.0 out of 5 from 1 ratings, while Deep Tools averages 4.6 from 93 ratings.

### Do myPSS or Deep Tools have ads?

Neither myPSS nor Deep Tools shows ads.

### Which is updated more often, myPSS or Deep Tools?

myPSS ships an update every 42 months, and Deep Tools every 2 months. Most recently, myPSS was updated on November 13, 2026 and Deep Tools on November 13, 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.*