Comparison

Baltic Blender vs Deep Tools

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 * 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.

About

Deep Tools

This comprehensive dive toolkit helps recreational, advanced, and technical divers plan dives, log underwater adventures, and blend gases. It offers advanced planning tools, dive computer import, and essential calculations for safe and efficient diving.

Highlights
  • Advanced Deco Planner
  • Dive Log with Shearwater import
  • Gas Blender for Trimix/Nitrox
  • Maximum Operating Depth (MOD) calculator
  • No Decompression Limit (NDL) tracking
  • Metric and Imperial units
Features
Read full description

The Complete Dive Toolkit Deep Tools is a must-have application for recreational, advanced, and technical divers. Whether you are learning to dive, planning complex decompression dives, or logging your underwater adventures, Deep Tools provides reliable tools you can trust. Import dives directly from your Shearwater dive computer, plan dives using the advanced Deco Planner, or use the app as a practical learning aid during your dive training. Tools included:
 - Maximum Operating Depth (MOD) - Oxygen Partial Pressure (ppO₂) - Equivalent Air Depth (EAD) - Equivalent Narcotic Depth (END) - Equivalent Air Density Depth (EADD) - No Decompression Limit (NDL) - Best Trimix for depth - Best Nitrox for depth - Gas consumption and density - Calculator for lifting bag Dive Log: * - Import dives from Shearwater dive computers (Petrel, Perdix, NERD, Teric, etc.) - Log dive sites with name, coordinates, and custom tags - Automatically merge dives with short surface intervals - Share logged dives with your buddies - Create local backups or migrate data to another device Advanced Dive Planner: * Plan complex dives with confidence, whether on Open Circuit (OC) or Rebreather (CCR): - Repetitive dive planning - Bühlmann ZH-L16B and ZH-L16C with Gradient Factors - Gas consumption, CNS, and OTU calculations - Visual dive profile, text plan, pressure graph, and slate view - Lost gas planning - CCR Bailout planning - Multiple point dive plan with custom bailout points - Share dive plans with friends Gas Blender: * Prepare accurate breathing gas mixtures: - Trimix and Nitrox blending - Mix to desired gas - Mix with Top-off gas - Continuous flow blending Additional Features - Metric and Imperial units - Adjustable altitude and water type (EN13319, salt, fresh) - Set your altitude - Custom tank / cylinder database * Advanced features are available with a subscription or during the free trial. Special thanks to V. Paul Gordon, Serge Nelissen and Michael Heus for extensive testing and valuable contributions! Terms of Service: http://www.deepblue.si/privacy/terms-of-service.php

Screenshots

Baltic Blender4 screens
Deep Tools4 screens

Verdict

The call

The clearest difference is rating: Deep Tools at 4.6 against Baltic Blender's 2.9. Deep Tools also leads on update cadence (every 6 weeks vs every 4 months) and ratings volume (93 vs 11). Baltic Blender's advantage is iOS requirement (10.3 vs 15.6). On price, ads, in-app purchases and monetization model 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

Both are free to download. Baltic Blender sells 2 one-off in-app purchases and Deep Tools sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Deep Tools holds the better App Store score, 4.6 against 2.9. That said, the two scores are not equally well evidenced: Deep Tools has 93 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 38% of Baltic Blender's written reviews are positive against 50% of Deep Tools's.

UpkeepUpdate frequency

Baltic Blender ships an update every 4 months, Deep Tools every 6 weeks. Both last shipped on September 15, 2026.

Scorecard5 real differences · 5 level
Baltic Blender versus Deep Tools: the parameters behind the verdict, then further details
ParameterBaltic BlenderDeep Tools
PriceFreeFree
Rating2.9 (11 ratings)4.6 (93 ratings) — better
Positive reviews38.5% of reviews50.0% of reviews — better
Number of ratings1193 — better
Update frequencyEvery 4 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better15.6
Further details — not scored
Size7 MB12 MB
Age rating4+4+
DeveloperEskil OlsenDeep Blue d.o.o.

Customer experience

Baltic Blender

All ratings11 ratings
Positive45.5%
Neutral0.0%
Negative54.5%
Written reviews26 reviews
Positive38.5%
Neutral7.7%
Negative53.8%

Deep Tools

All ratings93 ratings
Positive91.4%
Neutral2.2%
Negative6.5%
Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

In-app purchases

2 purchases

Baltic Blender

One-time2
  • Trimix$4.99
  • Volumes & Pricing$4.99
3 purchases

Deep Tools

Subscriptions2
  • Subscription Monthly$2.991 Month
  • Subscription Yearly3 Days trial$17.991 Year
One-time1
  • Lifetime Subscription$39.99

Questions

Is Baltic Blender free?
Baltic Blender is free to download, with in-app purchases available.
Is Deep Tools free?
Deep Tools is free to download, with in-app purchases available.
Which has better reviews, Baltic Blender or Deep Tools?
Deep Tools is rated higher. Baltic Blender averages 2.9 out of 5 from 11 ratings, while Deep Tools averages 4.6 from 93 ratings.
Do Baltic Blender or Deep Tools have ads?
Neither Baltic Blender nor Deep Tools shows ads.
Which is updated more often, Baltic Blender or Deep Tools?
Baltic Blender ships an update every 4 months, and Deep Tools every 6 weeks. Most recently, Baltic Blender was updated on September 15, 2026 and Deep Tools on September 15, 2026.

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