Comparison

nDeco vs Dive Toolbox

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

nDeco

Plan multi-segment dives with ease using U.S. Navy and Bühlmann decompression models. Get instant dive information, depth limit guidance, and surface interval recommendations for safe underwater adventures.

Highlights
  • Multi-segment dive planning
  • U.S. Navy & Bühlmann decompression models
  • Depth limit guidance
  • Instant dive information
  • Surface interval recommendations
  • Metric/imperial unit flexibility
Features
Read full description

WHAT MAKES nDeco UNIQUE? * Simple and easy Dive Planning: Calculate multi-segment dive profiles * Safety First Approach: Built on U.S. Navy Diving Manual and Bühlmann ZH-L16 decompression models * Easy-to-Use Interface: Plan complex dives with just a few taps * Dynamic dive information * Easy to simulate multi segments dive scenarios KEY FEATURES: * Depth Limit Guidance: Safely plan dives from shallow reefs to deeper explorations * Multi-Segment Dive Planning: Create detailed dive profiles with multiple depth segments * Instant Dive Information: See total dive time, descent/ascent times, and surface intervals * Unit Flexibility: Switch between metric (meters) and imperial (feet) with one tap * Surface Interval Recommendations: Ensures safe intervals between multiple daily dives DESIGNED FOR DIVERS BY DIVERS for the recreational diver- nDeco provides the tools you need to plan safe, enjoyable underwater adventures. SAFETY DISCLAIMER: * Calibrated for sea-level, salt water diving * Designed for compressed air (21% oxygen) * Always dive within your training and certification limits DIVE SAFE. DIVE SMART. DIVE nDeco!

About

Dive Toolbox

Features
Read full description

DiveToolbox — Professional dive planning and gas calculation tools for recreational and technical divers. DECOMPRESSION DIVE PLANNER Plan single-level and multi-level dives using the Bühlmann ZH-L16C algorithm with configurable gradient factors. Get detailed ascent profiles, gas switch schedules, and comprehensive safety analysis including CNS, OTU, gas density, and END monitoring. GAS BLENDING CALCULATOR Step-by-step fill instructions for Nitrox and Trimix blending. Supports partial pressure and continuous flow methods with real-time MOD calculations. MOD / EAD / END CALCULATOR Instantly calculate Maximum Operating Depth, Equivalent Air Depth, and Equivalent Narcotic Depth for any gas mix. GRADIENT FACTORS EXPLORER Visualize how GF Low and GF High affect no-decompression limits and decompression schedules. SAC RATE CALCULATOR Calculate your Surface Air Consumption rate from dive data to improve gas planning accuracy. ROCK BOTTOM CALCULATOR Determine minimum gas reserves for safe ascent, including emergency scenarios with configurable safety margins. SUCCESSIVE DIVE PLANNER Plan repetitive dives accounting for residual nitrogen and helium tissue loading from previous dives. UNIT CONVERSIONS Convert between metric and imperial units for depth, pressure, volume, and temperature. KEY FEATURES • Multi-gas support with automatic deco gas switching • Save and organize dive plans in folders • Save tank presets for quick planning • Share plans via link or QR code • Export plans as PDF • Customizable diver profile (GF, SAC, PPO2, speeds) • Dark and light themes • Available in 7 languages: English, French, German, Spanish, Italian, Polish, Russian Terms of Use: https://divetoolbox.com/en/terms Privacy Policy: https://divetoolbox.com/en/privacy

Screenshots

nDeco4 screens
Dive Toolbox4 screens

Verdict

The call

The clearest difference is in-app purchases: nDeco at none against Dive Toolbox's 2. Dive Toolbox's advantage is update cadence (every 6 days vs every 7 months) and iOS requirement (15.0 vs 17.2). On price, ads 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

Both are free to download. Dive Toolbox sells 2 in-app purchases, starting at $5.99 per month. nDeco asks for nothing beyond the download.

UpkeepUpdate frequency

nDeco ships an update every 7 months, Dive Toolbox every 6 days. The most recent releases landed on June 3, 2026 and September 24, 2026 respectively.

Scorecard3 real differences · 7 level
nDeco versus Dive Toolbox: the parameters behind the verdict, then further details
ParameternDecoDive Toolbox
PriceFreeFree
Rating2.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 7 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.215.0 — better
Further details — not scored
Size73 MB33 MB
Age rating4+4+
DeveloperEyal VardiOnosia

In-app purchases

None

nDeco

No in-app purchases

2 purchases

Dive Toolbox

Subscriptions1
  • Premium Monthly7 Days trial$5.991 Month
One-time1
  • Premium Lifetime$24.99

Questions

Is nDeco free?
nDeco is free to download, with no in-app purchases.
Is Dive Toolbox free?
Dive Toolbox is free to download, with in-app purchases available.
Do nDeco or Dive Toolbox have ads?
Neither nDeco nor Dive Toolbox shows ads.
Which is updated more often, nDeco or Dive Toolbox?
nDeco ships an update every 7 months, and Dive Toolbox every 6 days. Most recently, nDeco was updated on June 3, 2026 and Dive Toolbox on September 24, 2026.

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