# Baltic Blender

> Technical diving gas blending calculator using real gas models. (iPhone/iPad app by Eskil Olsen.)

- Source: https://appshunter.io/ios/app/baltic-blender/id511697085 (this page in markdown: same URL + `.md`)
- Developer: [Eskil Olsen](https://appshunter.io/developer/304464486)
- Category: Utilities, Sports
- Price: Free with in-app purchases
- Rating: 2.90/5 from 11 App Store ratings · 26 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.3 · 7 MB
- Languages: American English
- Released: 2012-04-02
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/baltic-blender/id511697085/reviews.md

## What is Baltic Blender?

Technical diving gas partial-pressure blending app. Supports nitrox and - via in-app purchase upgrades - trimix and pricing/volumes used.

Baltic Blender uses the GERG-2004 real gas model to allow a SCUBA gas blender to easily and accurately use partial-pressure techniques to blend available gasses to the desired final mixture. It is not intended as a substitute for proper training and certification in the safety, handling, and blending of high pressure gasses, but rather as a tool to perform the complex math required to reach the desired mixture. In such training classes, you would learn important safety information about the handling of high-pressure gasses. SCUBA gas blending is not to be taken lightly; it is one of the only activities where a mistake may not just kill you, but also those around you, or possibly the diver you are blending the gas for.

Traditional blending techniques have two inherent errors which the blender must learn to compensate for, traditionally by adding a fudge-factor. First, traditional blending uses the simple ideal gas model, but the gasses we breathe, at SCUBA cylinder pressures, are far from ideal gasses. Baltic Blender uses the GERG-2004 real gas model which predicts how the real-world gasses behave. Second, traditional blending generally ignores the heating of the cylinder as gas is introduced, requiring the blender to either fudge or allow the cylinder to cool. Baltic Blender requires that the blender allow the temperature to stabilize, rather than cool, between each step, so that an accurate measurement of the cylinder wall temperature using a commercially available infrared thermometer reflects the temperature of the gas inside.

Supports using preblended gas for eg. using leftover trimix or for using banked mixes. 

Features ;
   * Nitrox
   * Trimix (via in-app purchase)
   * Volume consumed & Pricing (via in-app purchase)
   * Blending and topping off
   * Metric and imperial units.
   * Simultaneous work on multiple cylinders
   * Grouping of tanks and pricing
   * Real Gas Law using GERG-2004
   * Per cylinder configurable preblend
   * Easy to access temperature adjustments
   * Configurable list of default gases
   * Configurable standard temperature
   * Bill printing/emailing
   
You can enter the data for multiple cylinders at once. Cylinders can be placed in groups for billing purposes. 

   
** Trimix, volume consumed and pricing is only available via in-app purchase upgrades. **
   
GERG-2004; Kunz, O.; Klimeck, R.; Wagner, W.; Jaeschke, M. (2007): The GERG-2004 Wide-Range Equation of State for Natural Gases and Other Mixtures: GERG Technical Monograph 15 (2007) and Fortschr.-Ber. VDI, Reihe 6, Nr. 557, VDI Verlag, Düsseldorf, 2007.

The partial GERG-2004 implementation used to calculate the compressibility factors of oxygen, helium, nitrogen and their mixtures in the gas phase was inspired by open source code written by David de Marneffe (daviddemarneffe[at]y a h o o . c o m) in December 2007.

## Key features

- Nitrox blending
- Trimix blending (in-app purchase)
- Volume and pricing calculations (in-app purchase)
- Real gas law (GERG-2004)
- Metric and imperial units
- Simultaneous cylinder work
- Bill printing/emailing

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Trimix | $4.99 | one-time |
| Volumes & Pricing | $4.99 | one-time |


## Recent user reviews (10 of 26)

All indexed reviews: https://appshunter.io/ios/app/baltic-blender/id511697085/reviews.md

### 2/5 — Useless for cubic feet volume calculations

*2022-10-25*

Used this for years and find it accurate enough. The big problem is the cubic feet calculations are off and therefore this app is useless for volume calculations.  Looking at the other reviews this is a common problem. I emailed the developer a year ago and he doesn’t seem to care.

### 1/5 — Auf iPhone nicht mehr zu gebrauchen

*2022-08-18*

Stürzt auf iPhone 11 mit iOS 15.6.1 immer ab, sobald der gewünschte Enddruck eingegeben wird. Somit nicht mehr zu gebrauchen. Daher Abwertung!

Auf iPad einwandfrei, volle Punktzahl! Bitte die Bugs beseitigen!!!!

### 1/5 — Freezes and no longer works

*2022-01-29*

Crashes when you try to enter the desired mix and pressure. This app is now useless. Can you please help correct this? Thank you!

### 1/5 — Update Required.

*2022-01-02*

Not Working in iOS 15.2.

### 1/5 — Nicht zu gebrauchen auf dem IPhone

*2021-12-07*

Stürzt beim übernehmen von Fülldrücken ständig ab.

### 1/5 — Please fix the latest update.

*2021-12-04*

Love this app when it works but that’s no longer the case. The app keeps freezing when you add desired gas pressure.

### 5/5 — I need this app!!  Love it

*2021-06-08*

I just upgraded to an iPhone 12. Hoping it would stop freezing up. It still is. Please try to correct the problems. Thanks

### 5/5 — Excellent Application

*2021-04-27*

Once of the best and easiest to use gas blending applications available. The calculations are very accurate if accurately following to pressures and correct temperatures.

### 2/5 — Absturz

*2021-04-10*

Stürzt auf dem IPhone 12 Max ständig ab. Auf dem Ipad läuft sie ohne Probleme.

### 3/5 — App stürzt jetzt ständig ab

*2021-04-06*

Habe die App heute auf meinem neuen Telefon installiert, seitdem stürzt die ständig gab. Auf meinem alten iPhone 6S und IPad Pro null Probleme, auf dem IPhone 12 Pro Max unbrauchbar...!
Bitte um Problem Lösung

## Frequently asked questions about Baltic Blender

### What is Baltic Blender used for?

Baltic Blender is a technical diving gas blending app that uses the GERG-2004 real gas model to accurately calculate partial-pressure blends for SCUBA diving. It helps divers create precise gas mixtures for their dives.

### Does Baltic Blender support trimix blending?

Yes, Baltic Blender supports trimix blending, but this feature is available as an in-app purchase upgrade. The base app supports nitrox blending.

### What is the pricing for Baltic Blender?

Baltic Blender is free to download and use for basic nitrox blending. Advanced features like trimix blending and volume/pricing calculations require in-app purchases.

### What devices is Baltic Blender available on?

Baltic Blender is available on iPhone and iPad devices. It is designed for iOS users.

### How often is Baltic Blender updated?

The latest version of Baltic Blender is 1.10, which was last updated on April 22, 2021. Users can expect updates to maintain functionality and potentially add new features.

### What is the age rating for Baltic Blender?

Baltic Blender has an age rating of 4+. This indicates it is suitable for a wide range of users, though its technical nature is best suited for trained divers.

### Does Baltic Blender have ads?

No, Baltic Blender does not contain advertisements. As it is free with in-app purchases, users can enjoy an ad-free experience.

### What gas model does Baltic Blender use for calculations?

Baltic Blender uses the GERG-2004 real gas model for its calculations. This model is more accurate than traditional ideal gas models for SCUBA cylinder pressures.

## Version history (last 5 releases)

### 1.10 — 2021-04-22

Fix hang when pressure/gas input is dismissed.

### 1.9 — 2020-12-28

Fixes for iOS14 and iPhone 12

### 1.8 — 2020-12-11

Updated for iOS 14.

### 1.7 — 2017-07-24

Further improvements to mapping adding gas back to volume. Now filling a 80 cuft 3000 psi tank from 0 to 3000 psi with air will show 80 cuft was added and not 79.6 cuft.

### 1.6 — 2017-06-13

- Use real gas law for pricing volume calculations.
- Fix bug where app crashed on high values in working pressure.

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## More apps by Eskil Olsen

- [Baltic Deco Planner](https://appshunter.io/ios/app/baltic-deco-planner/id304464483)
- [Baltic Deco Planner Lite](https://appshunter.io/ios/app/baltic-deco-planner-lite/id344421395)
- [Degree Calculator](https://appshunter.io/ios/app/degree-calculator/id6450392179)

All apps by Eskil Olsen: https://appshunter.io/developer/304464486

## Related topics

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

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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 2026-08-27.*