Comparison

Baltic Blender vs Nitrox Blender & Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Baltic Blender

This app assists technical divers in accurately blending gases for SCUBA diving using advanced real gas models. It performs complex calculations for partial-pressure techniques, supporting nitrox and optional trimix upgrades. The tool aids in precise gas mixture creation, emphasizing safety and accuracy in diving preparations.

Highlights
  • 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
Features
Read full description

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 * Per cylinder configurable preblend * Metric and imperial units. * Simultaneous work on multiple cylinders * Grouping of tanks and pricing * Real Gas Law using GERG-2004 * 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. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Nitrox Blender & Calculator

This app helps divers plan their dives by calculating maximum operating depth, optimal oxygen percentage, and equivalent air depth. It also assists in gas mixing for filling tanks, determining the required mix or the resulting blend.

Highlights
  • Calculate MOD
  • Calculate optimal oxygen percentage
  • Calculate equivalent air depth
  • Gas mixing calculations for tank fills
  • Determine required mix for desired blend
  • Calculate resulting mix from existing blend
Features
Read full description

Your enriched air nitrox buddy on the surface! Calculate MOD (maximum operation depth), optimal oxygen percentage and equivalent air depth when planning your dive, and calculate the gas mixing when filling tanks based on what you know about - either the desired end gas or the mix you fill up with. If you want to fill your tank and end up with a certain mix, you can calculate what mix to add, or if you fill air or another mix into an existing mix, you can calculate what mix you will end up with. ——— The utility is ment as a helping hand and a supplement to - and not replacement for well-thought calculations. The developer takes no responsibility for any errors that might be in the calculations or any consequences here of. Always dive within the limits of your education and dive only with enriched air (nitrox) if you have gained the proper training in the use. Control the calculations. Always analyze your gas before you dive. Dive safely! Plan your dive - dive your plan.

Screenshots

Baltic Blender4 screens
Nitrox Blender & Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: Nitrox Blender & Calculator at 100% against Baltic Blender's 38%. Nitrox Blender & Calculator also leads on in-app purchases (none vs 2) and iOS requirement (10.0 vs 17.0). Baltic Blender's advantage is price (Free vs $0.99) and update cadence (every 4 months vs every 9 months). On 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

CostPrice · In-app purchases · Ads · Monetization

Baltic Blender is free to download; Nitrox Blender & Calculator costs $0.99 up front. Baltic Blender sells 2 one-off in-app purchases. Nitrox Blender & Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Baltic Blender ships an update every 4 months, Nitrox Blender & Calculator every 9 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Baltic Blender versus Nitrox Blender & Calculator: the parameters behind the verdict, then further details
ParameterBaltic BlenderNitrox Blender & Calculator
PriceFree — better$0.99
Rating—4.5 (2 ratings) — better
Positive reviews38.5% of reviews100.0% of reviews — better
Number of ratings—2 — better
Update frequencyEvery 4 months — betterEvery 9 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.010.0 — better
Further details — not scored
Size7 MB85 MB
Age rating4+4+
DeveloperEskil OlsenComputerWare

Customer experience

Baltic Blender

Written reviews26 reviews
Positive38.5%
Neutral7.7%
Negative53.8%

Nitrox Blender & Calculator

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Baltic Blender

One-time2
  • Trimix$4.99
  • Volumes & Pricing$4.99
None

Nitrox Blender & Calculator

No in-app purchases

Questions

Is Baltic Blender free?
Baltic Blender is free to download, with in-app purchases available.
Is Nitrox Blender & Calculator free?
Nitrox Blender & Calculator costs $0.99, with no in-app purchases.
Do Baltic Blender or Nitrox Blender & Calculator have ads?
Neither Baltic Blender nor Nitrox Blender & Calculator shows ads.
Which is updated more often, Baltic Blender or Nitrox Blender & Calculator?
Baltic Blender ships an update every 4 months, and Nitrox Blender & Calculator every 9 months. Most recently, Baltic Blender was updated on October 23, 2026 and Nitrox Blender & Calculator on October 24, 2026.

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