myPSS vs Deep Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
myPSS
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.
- Dedicated platform for PSS members
- Dedicated platform for PSS instructors
- Centralized information hub
- Community communication tool
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myPSS, app dedicated to PSS members and instructors
Deep Tools
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.
- 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
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The complete dive planner, dive log and dive calculator app for recreational, technical and rebreather divers. Plan decompression dives with Bühlmann ZH-L16 and gradient factors, import your dives from a Shearwater dive computer, blend nitrox and trimix, and get quick answers to the questions you ask before every dive. All in one app, for open circuit (OC) and CCR. Whether you are in dive training, planning complex deco dives, or logging your underwater adventures, Deep Tools gives you reliable results you can trust. DIVE CALCULATORS - Maximum Operating Depth (MOD) - Oxygen partial pressure (ppO₂) - Equivalent Air Depth (EAD) - Equivalent Narcotic Depth (END) - Equivalent Air Density Depth (EADD) - No Decompression Limit (NDL) - Best nitrox mix for depth - Best trimix mix for depth - Gas consumption (SAC / RMV) and gas density - Lift bag calculator DECO PLANNER * Plan complex dives with confidence on open circuit (OC) or rebreather (CCR): - Bühlmann ZH-L16B and ZH-L16C with gradient factors (GF) - Multi-level and repetitive dive planning - Lost gas plans and CCR bailout planning, with custom bailout points - Gas consumption, CNS and OTU for every dive - Dive profile, run time table, tissue pressure graph and slate view - Share dive plans as a file, text, slate or image DIVE LOG * - Import dives from Shearwater dive computers (Petrel, Perdix, NERD, Teric and more) - Full dive profile with ppO₂, CNS, TTS, SAC and gas density - Dive sites with name, coordinates, map and custom tags - Automatically merge dives with short surface intervals - Share dives with your buddies - Local backup and easy transfer to a new device GAS BLENDER * Mix accurate nitrox and trimix: - Partial pressure blending to the desired gas - Blending with a top-off gas - Continuous flow blending - Gas cost estimate MORE - Metric and imperial units - Altitude diving and water type (salt, fresh, EN13319) - Custom tank / cylinder database - Available in 11 languages * The deco planner, dive log and gas blender are included in Deep Tools Premium. Try them free during the free trial. Deep Tools is a planning aid. It does not replace proper dive training or certification. Special thanks to V. Paul Gordon, Serge Nelissen and Michael Heus for extensive testing and valuable contributions. Terms of Use: https://www.deepblue.si/privacy/terms-of-service.php Privacy Policy: https://www.deepblue.si/privacy/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | myPSS | Deep Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.6 (93 ratings) |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 1 | 93 — better |
| Update frequency | Every 42 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 64 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Margherita Aucelli | Deep Blue d.o.o. |
Customer experience
myPSS
Deep Tools
In-app purchases
myPSS
No in-app purchases
Deep Tools
- Subscription Monthly$7.991 Month
- Subscription Yearly3 Days trial$22.991 Year
- Lifetime Subscription$49.99








