Gas Blender Toolkit vs IDDA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gas Blender Toolkit
This comprehensive toolkit assists scuba divers in calculating and blending various gas mixtures like trimix, nitrox, and heliox. It offers features for both partial pressure and continuous blending, cost calculation, and utilizes ideal and real gas models for accuracy. Optimized for larger screens, it serves as a successor to a previous diving application.
- Partial pressure blending
- Continuous blending
- Trimix, nitrox, heliox calculations
- Ideal and real gas models
- Cost calculation
- Top off from storage
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Gas Blender Toolkit is a comprehensive, purpose-built calculator for technical and recreational scuba divers who blend their own breathing gases. FUNCTIONS • Partial-pressure gas blending with freely configurable fill order • Continuous / delta-gas blending method • Decanting from a storage bank, with calculation of the number of possible fills • MOD / END tables for standard scuba gases • pSCR loop oxygen-reduction calculation at constant volume ratio • CCR rebreather diluent END calculator for any depth and chosen PPO2 setpoint FEATURES • Real gas (Van der Waals) or ideal gas calculations • Cost calculation for each gas fill • Fully customizable standard gas list • Accounts for gas heating during filling • Clean, fast and easy to use • Available in English, German, Russian and Spanish Gas Blender Toolkit is the completely rewritten successor to the DIR-Wetnotes app, redesigned from the ground
IDDA
This platform offers e-learning content and certifications to enhance diving knowledge and prepare for exams. It's designed to make learning and exam preparation more accessible for divers. Future updates promise even more features to support your diving journey.
- E-learning content
- Brevet platform
- Diving knowledge enhancement
- Exam preparation
- Accessible learning
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The IDDA App is a learning and brevet platform that provides e-learning content and brevets. With the app, users can deepen their diving knowledge and prepare for exams. The next updates of the app will include many new features that will make learning and preparing for exams even easier and more accessible. The IDDA app is a valuable tool for all divers who want to expand their diving knowledge and start their diving adventure
Screenshots
Verdict
The clearest difference is review sentiment: Gas Blender Toolkit at 60% against IDDA's 0%. Gas Blender Toolkit also leads on chart position (#106 vs unranked). IDDA's advantage is price (Free vs $2.99). On update cadence, ads, in-app purchases 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
IDDA is free to download; Gas Blender Toolkit costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Gas Blender Toolkit ships an update every 9 days, IDDA every 2 weeks. Both last shipped on September 17, 2026.
| Parameter | Gas Blender Toolkit | IDDA |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 60.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 9 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #106 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 3 MB | 37 MB |
| Age rating | 4+ | 12+ |
| Developer | Oleg Gurevich | IDDA GmbH |
Customer experience
Gas Blender Toolkit
IDDA
In-app purchases
Gas Blender Toolkit
No in-app purchases
IDDA
No in-app purchases
Questions
Is Gas Blender Toolkit free?
Is IDDA free?
Do Gas Blender Toolkit or IDDA have ads?
Which is updated more often, Gas Blender Toolkit or IDDA?
Other comparisons
