Comparison

MultiDeco 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

MultiDeco

This app calculates dive decompression for technical scuba divers using VPM and ZHL-16 models. It supports various gas mixes, planning methods for open circuit and rebreathers, and includes tools for gas blending and depth calculations.

Highlights
  • VPM and ZHL-16 decompression models
  • Support for nitrox and trimix
  • OC and CCR planning
  • Bailout planning
  • Gas blending utility
  • Depth calculation tools
Read full description

A dive decompression calculator for technical scuba divers. MultiDeco presents the VPM and ZHL-16 decompression model and includes VPM-B, VPM-B/E, ZHL model versions and ZHL-16 + GF. The diver can specify any combination of nitrox or trimix, and as many deco gases as required. Planning methods include both OC and Closed Circuit Rebreather. It includes planning for bailouts with SCR and OC legs in a CCR plan. Includes details of ppO2, END, and gas consumptions. This program includes many of the features from the desktop version such as conservatism adjustments, extended stops, adjustable last stops, the planning monitor system and extensive control over many other planning features. Also included is a set of dive planning tools for calculating best mix, maximum operating depth (MOD), END, EAD and other planning considerations. The Mixer utility for blending nitrox and trimix, is included too.

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

MultiDeco4 screens
Nitrox Blender & Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: Nitrox Blender & Calculator at 100% against MultiDeco's 39%. Nitrox Blender & Calculator also leads on price ($0.99 vs $48.99) and rating (4.5 vs 3.9). MultiDeco's advantage is update cadence (every 3 months vs every 9 months) and ratings volume (11 vs 2). On ads, in-app purchases, monetization model 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

MultiDeco costs $48.99 and Nitrox Blender & Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Nitrox Blender & Calculator holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: MultiDeco has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 39% of MultiDeco's written reviews are positive against 100% of Nitrox Blender & Calculator's.

UpkeepUpdate frequency

MultiDeco ships an update every 3 months, Nitrox Blender & Calculator every 9 months. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 4 level
MultiDeco versus Nitrox Blender & Calculator: the parameters behind the verdict, then further details
ParameterMultiDecoNitrox Blender & Calculator
Price$48.99$0.99 — better
Rating3.9 (11 ratings)4.5 (2 ratings) — better
Positive reviews38.9% of reviews100.0% of reviews — better
Number of ratings11 — better2
Update frequencyEvery 3 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.610.0 — better
Further details — not scored
Size2 MB85 MB
Age rating4+4+
DeveloperHHS Software Corp.ComputerWare

Customer experience

MultiDeco

All ratings11 ratings
Positive63.6%
Neutral18.2%
Negative18.2%
Written reviews18 reviews
Positive38.9%
Neutral22.2%
Negative38.9%

Nitrox Blender & Calculator

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

In-app purchases

None

MultiDeco

No in-app purchases

None

Nitrox Blender & Calculator

No in-app purchases

Questions

Is MultiDeco free?
MultiDeco costs $48.99, with no in-app purchases.
Is Nitrox Blender & Calculator free?
Nitrox Blender & Calculator costs $0.99, with no in-app purchases.
Which has better reviews, MultiDeco or Nitrox Blender & Calculator?
Nitrox Blender & Calculator is rated higher. MultiDeco averages 3.9 out of 5 from 11 ratings, while Nitrox Blender & Calculator averages 4.5 from 2 ratings.
Do MultiDeco or Nitrox Blender & Calculator have ads?
Neither MultiDeco nor Nitrox Blender & Calculator shows ads.
Which is updated more often, MultiDeco or Nitrox Blender & Calculator?
MultiDeco ships an update every 3 months, and Nitrox Blender & Calculator every 9 months. Most recently, MultiDeco was updated on September 19, 2026 and Nitrox Blender & Calculator on September 24, 2026.

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