# Gas Blender Toolkit — Trimix/Nitrox/blending & more

> Scuba gas blending calculator and cost estimator for divers. (iPhone/iPad app by Oleg Gurevich.)

- Source: https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490 (this page in markdown: same URL + `.md`)
- Developer: [Oleg Gurevich](https://appshunter.io/developer/1467768489)
- Category: Sports, Education
- Price: $2.99
- Rating: 3.00/5 from 2 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: American English
- Released: 2019-06-14
- Data updated: 2026-08-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490/reviews.md

## What is Gas Blender Toolkit?

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

## Key features

- Partial pressure blending
- Continuous blending
- Trimix, nitrox, heliox calculations
- Ideal and real gas models
- Cost calculation
- Top off from storage

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490/reviews.md

### 5/5 — Works well for mixing tech diving gasses

*2024-09-05*

Works well for mixing tech diving gasses

### 3/5 — Kopfzeile rutscht mit

*2023-09-18*

Leider rutscht die Kopfzeile immer mit beim runter scrollen. Das macht die App leider sehr unübersichtlichsten unruhig. 

Die Temperatur Kompensation ist da noch schlimmer im Verhalten.  

Version: v2.0.24 build: 2023010401
iPhone 13 Pro Max 
iOS: 16.6.1

### 4/5 — Sehr gute App mit Schönheitsfehlern

*2023-09-13*

Die Funktionen der App sind super, damit lassen sich alle Arten des Gasmischens super berechnen. 
Einen Stern ziehe ich ab da es ein Problem mit der Anzeige gibt. Die obere Menüleiste fehlt manchmal und beim nach unten Scrollen hüpft diese mittig ins Bild. Man kann damit arbeiten, aber nervt tierisch da teilweise wichtige Informationen verdeckt werden.

### 1/5 — Sliders

*2021-04-02*

Sliders for mix entry?  There must be something I’m not understanding.  There has got to be a better way to enter the percentages for each gas component and tank pressures.

**Developer response:** Hello Professor Haldane, 

please feel free to tap a value you wish to change and enter the percentages for each gas component and tank pressures directly. In addition, the "Common settings" menu can be used to hide sliders throughout the application.

best regards

### 5/5 — Top!

*2019-11-22*

Meiner Meinung nach die beste Gasblender App auf dem Markt. Alle Funktionen in einer übersichtlichen App. So soll es sein. Der Preis ist sehr fair.

## Frequently asked questions about Gas Blender Toolkit

### What gas mixtures can Gas blender toolkit calculate?

Gas blender toolkit can calculate trimix, nitrox, and heliox mixtures. It supports both partial pressure and continuous blending methods for these gases.

### Does Gas blender toolkit support different gas models?

Yes, Gas blender toolkit supports both the ideal gas model and the real gas model (van der Waals). This allows for more accurate calculations under various conditions.

### Can Gas blender toolkit calculate the cost of gas blends?

Yes, the application includes a cost calculation feature. This helps divers estimate the expense of creating specific gas blends.

### What devices is Gas blender toolkit optimized for?

Gas blender toolkit is optimized for larger devices such as tablets and desktops, offering a better user experience on these platforms. It is available for iPhone and iPad.

### How often is Gas blender toolkit updated?

The latest version, 2.0.26, was released on December 17, 2023. The app was originally released on June 14, 2019, indicating periodic updates.

### What is the price of Gas blender toolkit?

Gas blender toolkit is a paid application, priced at $1.99. There are no in-app purchases mentioned.

### Does Gas blender toolkit have ads?

No, Gas blender toolkit does not contain advertisements. It is a completely rewritten successor to a previous application, optimized for user experience.

### What is the age rating for Gas blender toolkit?

Gas blender toolkit has an age rating of 4+. This indicates it is suitable for users of all ages.

## Version history (last 5 releases)

### 2.0.35 — 2026-08-17

- Reworked gas limits by depth: oxygen partial pressure, narcotic depth and gas density in one place, showing which limit comes first
- Rebreather screens now calculate the loop gas you actually breathe, and warn when the supply gas cannot sustain it
- Corrected the depth calculation: 1 bar is no longer treated as 1 atmosphere
- All texts are now available in all five languages

### 2.0.34 — 2026-08-15

- Isochore: new help text explaining temperature compensation
- Isochore: the measured temperature is no longer corrected silently, and the slider now covers the whole measurement range
- Isochore: the measured temperature is no longer kept for the next time
- Settings: the controls are now real buttons and work better with screen readers

### 2.0.33 — 2026-08-13

- Fixed the dark mode: notification messages and some buttons no longer show up in light colours

### 2.0.32 — 2026-08-12

- Neues Farbschema mit Dunkelmodus: manuell wählbar oder automatisch nach Systemeinstellung
- Topoff-Legendendiagramm überarbeitet, jetzt auch auf schmalen Displays lesbar
- Übersetzungsfehler an mehreren Stellen korrigiert
- Info-Seite aktualisiert
- Technische Basis modernisiert für bessere Leistung und Stabilität

### 2.0.30 — 2026-08-10

- Anzeigefehler im Bereich der Statusleiste behoben

## Apps similar to Gas Blender Toolkit

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Nitrox Tools](https://appshunter.io/ios/app/nitrox-tools/id284919980) | 5.0 (4) | $5.99 | Sports |
| [SUEX Calypso](https://appshunter.io/ios/app/suex-calypso/id1478705852) | — | Free | Sports |
| [Trimix Tools](https://appshunter.io/ios/app/trimix-tools/id289220808) | 5.0 (5) | $6.99 | Sports |
| [Diveplanner Tec & Rec](https://appshunter.io/ios/app/diveplanner-tec-and-rec/id1506985833) | 3.1 (7) | Free | Sports |
| [Halcyon Dive Systems - Diving](https://appshunter.io/ios/app/halcyon-dive-systems-diving/id6738069654) | 5.0 (8) | Free | Sports |
| [DecoPlanner mobile](https://appshunter.io/ios/app/decoplanner-mobile/id1580563324) | — | Free | Sports |

## Related topics

[arcus trimix blender](https://appshunter.io/ios/topics/arcus-trimix-blender)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*