EANx Assistant vs Fastener Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EANx Assistant
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EANx Assistant is a nitrox diving calculation tool designed for recreational divers and diving instructors. Whether you are a professional diving instructor or a nitrox diving enthusiast, this application can help you perform various nitrox diving-related calculations quickly and accurately. 【Main Features】 • Maximum diving depth calculation: Automatically calculates safe diving depth limits based on oxygen content percentage • Optimal nitrox ratio calculation: Provides the best gas mixture ratio for specified depths • Equivalent Air Depth calculation: Converts nitrox diving to equivalent air diving depth • Oxygen partial pressure calculation: Real-time monitoring of oxygen partial pressure values at different depths and gas mixtures • Adjustable maximum PPO₂ value: Supports customized safety thresholds, default is 1.4 【Usage Scenarios】 • Pre-dive planning: Quickly determine the optimal gas mixture for your diving plan • Teaching aid: Diving instructors can use it for training courses and on-site teaching 【Thoughtful Design】 • Clean and intuitive blue interface, reducing recognition pressure • Bilingual support in Chinese and English, meeting the needs of international divers • Intuitive slider controls for quick parameter adjustments EANx Assistant makes complex nitrox diving calculations simple. No internet connection required, perform calculations anytime, anywhere - an indispensable digital tool in your diving equipment. Note: This application is only intended as an auxiliary calculation tool and should not replace professional dive training and certification. Always follow safe diving rules and receive appropriate training before using nitrox gas mixtures.
Fastener Pro
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Determine a safe and reliable fastener torque for your application. By selecting your bolt material spec, nut material spec, and set material specs from our comprehensive material database we will evaluate all possible failure modes of the bolt, nut, set material, and joint materials and provide a details stress analysis as well as the recommended torque. Additional features include determination of preload from torque, torque from preload, load analysis, and equivalent angle to turn fastener to achieve desired results. Disclaimer: Bolt torque and preload values are estimates only. Actual requirements depend on material, lubrication, standards, and installation conditions. Verify all values using official engineering documentation and calibrated tools. Developer assumes no liability for use of this information.
Screenshots
Verdict
The clearest difference is price: EANx Assistant at Free against Fastener Pro's $14.99. EANx Assistant also leads on update cadence (every 2 days vs every 5 weeks). Fastener Pro's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement 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
EANx Assistant is free to download; Fastener Pro costs $14.99 up front. EANx Assistant sells 3 one-off in-app purchases. Fastener Pro asks for nothing beyond the download.
EANx Assistant ships an update every 2 days, Fastener Pro every 5 weeks. The most recent releases landed on October 8, 2026 and October 19, 2026 respectively.
| Parameter | EANx Assistant | Fastener Pro |
|---|---|---|
| Price | Free — better | $14.99 |
| Update frequency | Every 2 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | 嘉亮 曾 | Jeffrey Andrews |
In-app purchases
EANx Assistant
- Small Coffee$0.99
- Medium Coffee$1.99
- Large Coffee$2.99
Fastener Pro
No in-app purchases
Questions
Is EANx Assistant free?
Is Fastener Pro free?
Do EANx Assistant or Fastener Pro have ads?
Which is updated more often, EANx Assistant or Fastener Pro?
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