TrimixBlending vs CCR Junk
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TrimixBlending
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This app allows technical divers to create custom Trimix blends (Helium, Oxygen, Nitrogen) using partial pressure blending (PPB), with support for Nitrox top-ups and ideal gas law calculations for precise gas mixing. Real Gas Calculations, uses equations of state (Van der Waals) for accurate blending. Accounts for molecular interactions and non-ideal behavior
CCR Junk
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CCR Junk is the decompression planner built specifically for rebreather divers. No tab-switching, no buried menus, no nonsense. Just one powerful screen with every variable you need to plan your dive. Created by CCR divers who were tired of clunky interfaces and planners that treat rebreathers as an afterthought, CCR Junk puts closed-circuit diving first. Plan any CCR dive From recreational rebreather dives to complex cave penetrations with multiple bailout scenarios — CCR Junk handles it all. Multi-level profiles, extended ranges, whatever your dive demands. Algorithms you trust Choose between Bühlmann ZHL-16C with configurable gradient factors or VPM-B. Switch between them instantly to compare profiles and pick your preferred conservatism. True CCR planning Full setpoint management throughout your dive. Track your scrubber time and know exactly where you stand. Plan with the variables that actually matter for rebreather diving. Breathe easy Real-time gas density calculations for every phase of your dive. Know exactly when you're approaching the recommended limits and plan your diluent choice accordingly. Because work of breathing matters. Bailout planning that works Plan realistic bailout scenarios for cave and overhead environments. Configure multiple bailout gases, see your gas requirements, and know you have a solid plan B. Works anywhere No internet required. Plan your dives on the boat, at the dive site, or in the middle of nowhere. Your dive data stays on your device. One screen philosophy Everything visible, everything accessible. Adjust a parameter and instantly see how it affects your profile. No switching between pages, no lost context. This is CCR dive planning the way it should be.
Screenshots
Verdict
The clearest difference is price: TrimixBlending at Free against CCR Junk's $8.99. CCR Junk's advantage is update cadence (every 6 days vs every 14 months) and iOS requirement (15.0 vs 26.5). 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
TrimixBlending is free to download; CCR Junk costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TrimixBlending ships an update every 14 months, CCR Junk every 6 days. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.
| Parameter | TrimixBlending | CCR Junk |
|---|---|---|
| Price | Free — better | $8.99 |
| Update frequency | Every 14 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 22 MB |
| Age rating | 4+ | 17+ |
| Developer | Costas Bakopanos | Rogier Visser |
In-app purchases
TrimixBlending
No in-app purchases
CCR Junk
No in-app purchases








