Gas Blender Toolkit vs DecoPlanner mobile
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
DecoPlanner mobile
Plan complex dive profiles using advanced decompression models. Track multiple gases, manage dive buddies, and visualize dive data with detailed graphs. Choose the version that suits your diving certification level.
- Open/Closed/Passive Semi-Closed Circuit planning
- ZH-L16 / VPM-B decompression models
- Gas tracking for multiple gases and dive buddies
- Gas mixing (partial pressure & continuous blending)
- Dive profile and tissue compartment graphs
- Diving level selection (Rec 1 to Unlimited CCR)
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Features: Open Circuit / Closed Circuit / Passive Semi-Closed Circuit planning ZH-L16 / VPM-B decompression models Convenient grouping of decompression stops Gas tracking of multiple gases and dive buddies Gas mixing through partial pressure and continuous blending Multiple graphs outlining dive profiles and tissue compartment pressures Select the version fitting your current level of diving, from Rec 1 to Unlimited CCR. More information at www.gue.com/store/software/decoplanner-4
Screenshots
Verdict
The clearest difference is price: DecoPlanner mobile at Free against Gas Blender Toolkit's $2.99. DecoPlanner mobile also leads on iOS requirement (13.0 vs 15.0). Gas Blender Toolkit's advantage is update cadence (every 9 days vs every 2 months) and review sentiment (60% vs 40%). On 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
DecoPlanner mobile 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, DecoPlanner mobile every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Gas Blender Toolkit | DecoPlanner mobile |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 60.0% of reviews — better | 40.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleg Gurevich | Global Underwater Explorers Inc. |
Customer experience
Gas Blender Toolkit
DecoPlanner mobile
In-app purchases
Gas Blender Toolkit
No in-app purchases
DecoPlanner mobile
No in-app purchases
Questions
Is Gas Blender Toolkit free?
Is DecoPlanner mobile free?
Do Gas Blender Toolkit or DecoPlanner mobile have ads?
Which is updated more often, Gas Blender Toolkit or DecoPlanner mobile?
Other comparisons
