Gas Blender Toolkit vs Caveradar
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
Caveradar
Plan cave dives with detailed condition reports, weather context, and directions. Access key information offline and find local dive partners. Contribute reports to keep conditions updated for the community.
- Recent cave condition reports
- Weather context for dive sites
- Driving directions and access info
- Offline caching of key data
- Partner listings for instructors/centers
- Fast, dropdown-only report contribution
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Caveradar. Know before you dive. Plan your cave dives with confidence using recent, structured condition reports — plus weather context and directions — whether you're planning tomorrows' dive in Florida, next weeks' dives in Mexico or next years' trip to France. What you get: • Recent cave-condition reports: visibility + flow + hazards (structured, easy to compare) • Weather context for every site • Driving directions + access context to simplify planning • Offline caching: key info stays available at the site even with weak signal • Partner listings in-app: find endorsed instructors and dive centers Contribute (fast, no noise): • Add a report in seconds using dropdown-only inputs - no typing • Every report helps keep conditions fresh for the next team Coverage: • France: Lot, Hérault, Ardèche and Doubs (new addition!) • Germany: nationwide coverage • Switzerland • Italy: most regions (expanding) • UK: some caves, expanding • USA: Florida • Mexico: Quintana Roo • Norway • Sweden • Finland • New Zealand • Australia • Spain (new addition!) Built for cave divers, by cave divers. Important: The information presented on this platform is not a substitute for proper cave diving training, certification, personal site assessment, or professional guidance.
Screenshots
Verdict
The clearest difference is price: Caveradar at Free against Gas Blender Toolkit's $2.99. Gas Blender Toolkit's advantage is rating (3.0 vs 1.0) and in-app purchases (none vs 1). On ratings volume, 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
Caveradar is free to download; Gas Blender Toolkit costs $2.99 up front. Caveradar sells 1 in-app purchase, starting at $1.99 per month. Gas Blender Toolkit asks for nothing beyond the download.
Gas Blender Toolkit holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Gas Blender Toolkit ships an update every 9 days, Caveradar every 5 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.
| Parameter | Gas Blender Toolkit | Caveradar |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (2 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 9 days | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 3 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleg Gurevich | Harald Franzen |
Customer experience
Gas Blender Toolkit
Caveradar
In-app purchases
Gas Blender Toolkit
No in-app purchases
Caveradar
- Caveradar Premium$1.991 Month
Questions
Is Gas Blender Toolkit free?
Is Caveradar free?
Which has better reviews, Gas Blender Toolkit or Caveradar?
Do Gas Blender Toolkit or Caveradar have ads?
Which is updated more often, Gas Blender Toolkit or Caveradar?
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