PSS EVO vs Nitrox by Envivia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PSS EVO
This app serves as a digital learning hub, offering educational content for users. It provides a centralized platform for accessing various learning materials and resources.
- E-learning center
- Access educational content
- Centralized learning platform
- Educational resources
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PSS EVO - Your E-learning center.
Nitrox by Envivia
This app is a premium digital guide for Nitrox diving, offering educational content and calculation tools to optimize dives. It helps divers understand oxygen limits, plan dives using gradient factors, and prepare for certification.
- Calculate MOD (Maximum Operating Depth)
- Manage oxygen partial pressure (PPO₂)
- Optimize Nitrox dive planning
- Understand oxygen-related physiological limits
- Prepare for Nitrox certification
- Multilingual support
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[Master Nitrox] Nitrox is a premium digital guide dedicated to Nitrox diving (EANx). Designed to support divers in their training and progression, the app combines clear educational content, technical expertise, and reliable calculation tools to optimize every dive. [What Nitrox Allows You To Do] • Accurately calculate your MOD (Maximum Operating Depth) • Manage oxygen partial pressure (PPO₂) • Optimize your Nitrox dive planning using gradient factors • Understand oxygen-related physiological limits • Effectively prepare for your Nitrox certification [A True Educational Companion] Nitrox is designed for: Divers preparing for a Nitrox certification Recreational divers looking to improve their safety Experienced divers seeking to deepen their knowledge Instructors looking for a structured and reliable support tool The app is more than just a calculator: it helps you understand, anticipate, and adapt your dive parameters. [Important] Nitrox is an educational aid for dive planning. It does not replace recognised training, your training agency’s procedures, or a dive computer. Every dive plan must be adapted to actual conditions, the divers’ experience, and the dive team’s agreed procedures. This is not a medical device. [Multilingual] Available in French, English, Spanish, Italian, and German. [About Nitrox Premium] • Payment will be charged to your iTunes account at confirmation of purchase. • The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. • Your account will be charged for renewal within 24 hours prior to the end of the current period. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription. • Subscriptions may be managed by the user, and auto-renewal may be turned off in the iTunes account settings after purchase. Privacy Policy https://envivia.fr/policy/nitrox/privacy/ Terms of Use – EULA https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: PSS EVO at none against Nitrox by Envivia's 4. PSS EVO also leads on iOS requirement (10.0 vs 15.6). On price, update cadence, 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. Nitrox by Envivia sells 4 in-app purchases, starting at $9.99 per year. PSS EVO asks for nothing beyond the download.
PSS EVO ships an update every 3 months, Nitrox by Envivia every 6 weeks. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.
| Parameter | PSS EVO | Nitrox by Envivia |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 5 MB | 72 MB |
| Age rating | 4+ | 12+ |
| Developer | Margherita Aucelli | ENVIVIA |
Customer experience
PSS EVO
Nitrox by Envivia
In-app purchases
PSS EVO
No in-app purchases
Nitrox by Envivia
- Premium$9.991 Year
- Thank you$1.99
- Popular$9.99
- Generous$49.99
Questions
Is PSS EVO free?
Is Nitrox by Envivia free?
Do PSS EVO or Nitrox by Envivia have ads?
Which is updated more often, PSS EVO or Nitrox by Envivia?
Other comparisons
