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.
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.
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.
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
Dive Kit
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
Dive Kit
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.
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
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 | Notes |
|---|---|---|---|
| Real-gas model | NIST compressibility | GERG-2004 | Both plan away from the ideal gas law. |
| 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 | Dive Kit: limited banks with size and pressure. Baltic Blender: a preblend per cylinder. |
| Several plan options | Yes | Not documented | |
| Continuous blending | Yes | Not documented | |
| Decant between cylinders | Yes | Not documented | Baltic Blender tops off from a supply gas. |
| Altitude | Yes | Not documented | Baltic Blender's manual puts the error at about 0.2 bar at 2 km. |
| Several cylinders at once | Saved cylinders | Yes | |
| Gas volumes, pricing and bills | No | $4.99 upgrade | Bills print or go by email; cylinders group for billing. |
| MOD and END while picking a mix | Separate Gas Specs tool | Yes | Baltic Blender shows them at ppO2 1.2, 1.4 and 1.6. |
| Other dive tools | Deco planner and 10 free tools | No | Its maker sells the Baltic Deco Planner separately. |
| Runs in a browser | Yes | No | Dive Kit's blending and top-up calculators are free on this site. |
| 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 | Its site lists no Android version. |
| Last update | Frequent | 2.2, 2 November 2026 | Version 2.0, a rewrite, came out in October 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?
Do both use a real-gas model?
Which one is free?
Can I bill customers for fills?
Does Baltic Blender run on Android?
Does either plan 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.