MultiDeco vs Nitrox Blender & Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- VPM and ZHL-16 decompression models
- Support for nitrox and trimix
- OC and CCR planning
- Bailout planning
- Gas blending utility
- Depth calculation tools
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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.
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | MultiDeco | Nitrox Blender & Calculator |
|---|---|---|
| Price | $48.99 | $0.99 — better |
| Rating | 3.9 (11 ratings) | 4.5 (2 ratings) — better |
| Positive reviews | 38.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | 2 |
| Update frequency | Every 3 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 10.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | HHS Software Corp. | ComputerWare |
Customer experience
MultiDeco
Nitrox Blender & Calculator
In-app purchases
MultiDeco
No in-app purchases
Nitrox Blender & Calculator
No in-app purchases
Questions
Is MultiDeco free?
Is Nitrox Blender & Calculator free?
Which has better reviews, MultiDeco or Nitrox Blender & Calculator?
Do MultiDeco or Nitrox Blender & Calculator have ads?
Which is updated more often, MultiDeco or Nitrox Blender & Calculator?
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