Gas blending comparison

Baltic Blender vs Dive Kit

Two real-gas blending apps, side by side

Both plan partial-pressure nitrox and trimix fills with a real-gas model instead of the ideal gas law, from what is already in the cylinder and the gas you have. Baltic Blender adds per-step temperature readings and bills for a fill station, and runs on Apple devices. Dive Kit's Blend Planner adds continuous blending and decanting, is free with trimix included, and runs on iOS, Android and in the browser.

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Baltic Blender fill plan: air at 120 bar and 21 °C to EAN50 at 200 bar, add oxygen to 193.7 bar, then air to 201.0 bar
Baltic Blender
Dive Kit Blend Planner plan: bleed, add helium, add oxygen, with two options
Dive Kit

Common ground

The same job: a fill plan you can follow

Both are tools for trained blenders, not a substitute for the training.

Real gas, not the ideal gas law

At fill pressures oxygen, helium and nitrogen do not behave like ideal gases. Baltic Blender uses the GERG-2004 equation of state; Dive Kit uses compressibility factors from per-component NIST data. Both matter most for helium, which an oxygen analyser cannot check.

Partial pressure, step by step

Both start from the cylinder's current mix and pressure, bleed when they must, and give the pressure to stop at for each gas, nitrox and trimix, from air, oxygen, helium or a banked or leftover mix.

Temperature in the plan

Both account for the heat of a fill instead of leaving a fudge factor to the blender, in different ways (see below).

Neither tool replaces an analyser: analyse every blended cylinder for oxygen, and for helium on trimix, and dive the measured mix.

Try Dive Kit's gas blending calculator in your browser

Where they differ in use

Baltic Blender screenshots from its iPhone app, taken on 3 November 2026: one nitrox fill, air at 120 bar topped to EAN50 at 200 bar.

01

Temperature

Baltic Blender asks you to let the gas settle after each step, measure the cylinder wall with an infrared thermometer and set that reading on a ruler under the result; the stop pressures follow it. On our fill into an 11.1 L cylinder, moving the reading from 21 to 26 °C raised the oxygen stop from 193.7 to 198.6 bar and the air top-off from 201.0 to 206.1 bar. Dive Kit takes the ambient and fill temperatures once, plans the fill at the fill temperature and adds a step with the pressure the cylinder settles to as it cools.

Baltic Blender result at 26 °C: add oxygen to 198.6 bar, add air to 206.1 bar, a current-temperature ruler, the water volume and 817.2 L of oxygen

Baltic Blender

Dive Kit Blend Planner environment with altitude, ambient and fill temperature

Dive Kit

02

Picking a mix

Baltic Blender's mix picker lists standard mixes from air to oxygen and shows, for ppO2 1.2, 1.4 and 1.6, the depth and END of the mix you are on; helium stays locked until the trimix upgrade. Dive Kit's Blend Planner takes the mix as numbers and leaves depths to its separate Gas Specs tool, which gives END, EAD, ppO2, gas density and the MODs for any mix.

Baltic Blender target mix picker on EAN50: 13, 17 and 21 msw for ppO2 1.2, 1.4 and 1.6, each with its END

Baltic Blender

Dive Kit Gas Specs results for a trimix: END, EAD, PPO₂, density and MODs

Dive Kit

03

Banks and leftover gas

Baltic Blender sets a preblend per cylinder, such as leftover trimix or a banked mix, and handles a preblend that runs out mid-fill. Dive Kit keeps a list of banks of any mix, each unlimited or a limited bottle with its size and pressure, never draws more than a limited bank holds, and offers more than one plan when there is more than one way to make the fill.

Dive Kit banks: air, oxygen and a limited helium bottle
04

Continuous blending and decanting

Dive Kit's Blend Planner has two more modes. Continuous gives the air, oxygen and helium flow ratios for a mixing panel and the analyser readings to expect; Decant plans a top-off from one cylinder into another through a transfill whip and shows which mixes it can reach first.

Dive Kit only
Dive Kit continuous blending: flow ratios and analyser readings
05

Running a fill station

Baltic Blender works on several cylinders at once, groups them, and with its $4.99 volumes and billing upgrade prices the gas used and prints or emails a bill. In our session the result listed the gas the fill takes, 817.2 L of oxygen and 70.9 L of air, and asked for gas prices in Settings to show the cost. Dive Kit lists the gas each bank gave for a fill, but has no pricing, groups or bills.

Feature by feature

Baltic Blender facts from its App Store listing, website and manual on 3 November 2026. "Not documented" means we found it in none of them.

Feature Dive Kit Baltic Blender
Real-gas model NIST compressibility GERG-2004
Partial-pressure nitrox Yes Yes
Trimix Free $4.99 upgrade
Temperature Ambient and fill, set once Measured at each step
Banked or leftover mixes Yes Yes
Several plan options Yes Not documented
Continuous blending Yes Not documented
Decant between cylinders Yes Not documented
Altitude Yes Not documented
Several cylinders at once Saved cylinders Yes
Gas volumes, pricing and bills No $4.99 upgrade
MOD and END while picking a mix Separate Gas Specs tool Yes
Other dive tools Deco planner and 10 free tools No
Runs in a browser Yes No
Price Free Free; $4.99 trimix, $4.99 billing
Languages 8 English
Platforms iOS · iPad · Mac (M1, iPad app) · visionOS · Android · web iOS · iPad · Mac (M1, iPad app) · visionOS
Last update Frequent 2.2, 2 November 2026

Where Dive Kit differs

  • Free, with trimix included
  • Continuous blending for a mixing panel, and decanting between cylinders
  • Limited banks it never overdraws, and more than one plan when there is one
  • Altitude in the plan
  • iOS, Android and the browser, in eight languages
  • A deco planner and ten more free dive tools in the same app

Frequently asked questions

Baltic Blender vs Dive Kit, answered with sources.

Is Dive Kit a good Baltic Blender alternative?

For planning a fill, yes: real-gas partial-pressure plans for nitrox and trimix, banks of any mix, plus continuous blending and decanting, free and on Android as well as iPhone. It is not a replacement if you run a fill station on Baltic Blender's bills and cylinder groups, or prefer entering a measured cylinder temperature at every step.

Do both use a real-gas model?

Yes. Baltic Blender uses the GERG-2004 equation of state. Dive Kit uses compressibility factors interpolated from per-component NIST data, the approach Subsurface takes. On a trimix fill the real-gas plan can differ by a bar or two from what the ideal gas law gives; analyse the result either way.

Which one is free?

Dive Kit's Blend Planner is free, trimix included, in the app and on this website. Baltic Blender is a free download for nitrox; trimix is a $4.99 upgrade and gas volumes with billing another $4.99, as listed on 3 November 2026.

Can I bill customers for fills?

With Baltic Blender's volumes and billing upgrade, yes: it prices the gas used, groups cylinders and prints or emails a bill. Dive Kit shows the gas each bank gave for a fill but does not price it or produce a bill.

Does Baltic Blender run on Android?

Its website and store listing name iPhone and iPad only; on the App Store it also runs on Apple Silicon Macs and Apple Vision Pro. Dive Kit runs on iOS and Android, and its blending calculator runs in any browser.

Does either plan continuous blending?

Dive Kit does: its Continuous mode gives the flow ratios for a mixing panel and the analyser readings to expect, with the injection order for trimix. Baltic Blender documents partial-pressure fills and top-offs, not continuous blending.

Sources

Baltic Blender details were read on 3 November 2026 from its US App Store listing (version 2.2, 2 November 2026; the ratings were recently reset), balticblender.com and its metric manual for version 2.0. Baltic Blender is made by Eskil Olsen, who also makes the Baltic Deco Planner. The screenshots come from one nitrox fill planned in its iPhone app on 3 November 2026. We have not run the same fills through both apps; this page compares documented features and prices, not computed pressures. Corrections are welcome at hello@divekit.app.

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