Comparison

NASDS vs Dive Kit

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

Head to head
About

NASDS

Features
Read full description

Hier können Sie ihre Brevets digital speichern, Sie können ihren Tauchgang loggen. Und Sie finden nützliche Tipps für einen sicheren Tauchgang.

About

Dive Kit

This app offers advanced decompression planning for technical divers, including trimix and CCR dives. It also provides a suite of free tools for gas analysis, consumption, and dive preparation. Users can store certifications and access dive signals offline.

Highlights
  • Decompression planning (Bühlmann ZH-L16C)
  • Trimix, CCR, and Nitrox support
  • Gradient factors and contingency planning
  • Free dive tools (Best Mix, Gas Specs)
  • Offline functionality
  • Certification wallet
  • Dive signal library
Features
Read full description

Dive Kit is a decompression planner for technical divers, and a set of dive tools for every diver. The Deco Planner covers open-circuit, nitrox, trimix and CCR dives on Bühlmann ZH-L16C with gradient factors. It is the only paid tool: a one-time lifetime purchase or a subscription. The other eleven tools are free, with no ads and no account. Large text for direct sun and large buttons for wet hands. Works offline. Deco Planner - Multi-level profiles, with stops between levels when the plan needs them and gas switches where the PPO₂ allows - Gradient factors, last stop, ascent rates, oxygen breaks, stop rounding (1 min, 30 s or 1 s) and PPO₂ limits per gas, all set per plan - Contingency tabs: deeper, longer, lost gas, or your own. Each shows the change in run time, TTS and CNS against the base plan - Modifiers: working and deco SRMV and a delay at depth, on the base plan or on one contingency - CCR: setpoint schedules by depth, diluent switches, dilout, and open-circuit bailout from the end of the profile, after any level, at a run time or on ascent - Gas per cylinder: remaining pressure at each stop, a reserve per cylinder, ascent pressure, and what happens when a cylinder runs dry - Warnings with the number and the limit: PPO₂, END, gas density, CNS, OTU, hypoxia, reserve - Repetitive dives, with tissue loading carried over the surface interval - Plan variants, overlaid on one graph - Share by QR code or link; anyone can open a shared plan without paying. Export the table or a slate as PDF, image or text, ready to print How the engine was checked Dive Kit's engine is an independent implementation of ZH-L16C, written from the published papers. It was cross-checked on 33 dive profiles. The method and the differences found are published at divekit.app/docs/engine/how-it-works/. Agreement shows the math matches. It does not show a plan is safe. Free Tools - Best Mix: nitrox and trimix by MOD, helium by END, with narcotic and density limits - Gas Specs: EAD, PPO₂, END and gas density, with warnings at your limits - Gas Usage: multi-level consumption, turn pressure, thirds to sixths - SAC/SRMV: your breathing rate from a real dive - Buoyancy: weighting from suit, body, gear and water, with lift and overweighting checks - Blend Planner: partial-pressure and continuous blending with real-gas corrections and expected analyzer readings - Mix Result: what a top-up or a decant gives you - Checklists: your own pre-dive routines and rebreather presets, with timers that keep running when you close the app - Cylinders, Converter, Dive Signals: 90+ illustrated, searchable signals and 35+ cylinder specifications Learning Tutorials on gas physics, decompression theory and trimix, and help on key results. Certification Wallet 25+ agencies and 190+ certifications. Add photos of your cards and show one full screen at the dive centre. Your profile holds your dive insurance details. Options - Offline, on phones and tablets - Eight languages: English, German, Turkish, Swedish, Russian, Polish, Simplified Chinese, Korean - Five styles, each in light and dark, and a choice of two app icons - Automatic backup to your own iCloud Drive or Google Drive, if you turn it on No account. Your data stays on your device unless you share a plan or turn on backup. Analytics and crash reports can be turned off in Settings. Warning and Disclaimer Dive Kit is a reference and planning aid for trained divers, and that covers all its tools. It is not a dive computer and not a substitute for training. The deco planner is for divers trained in decompression diving, and gas blending is for trained blenders. Results can be wrong, so check every result against a second source. Dive Kit is provided as is, and you use it at your own risk. Warning and disclaimer: https://divekit.app/safety/ Terms of Use: https://divekit.app/terms/ Privacy Policy: https://divekit.app/privacy-policy/ Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

NASDS2 screens
Dive Kit4 screens

Verdict

The call

The clearest difference is in-app purchases: NASDS at none against Dive Kit's 3. NASDS also leads on iOS requirement (13.0 vs 16.4). Dive Kit's advantage is update cadence (every 4 days vs monthly). 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 Kit sells 3 in-app purchases, starting at $4.99 per month. NASDS asks for nothing beyond the download.

UpkeepUpdate frequency

NASDS ships an update monthly, Dive Kit every 4 days. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
NASDS versus Dive Kit: the parameters behind the verdict, then further details
ParameterNASDSDive Kit
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size42 MB128 MB
Age rating4+4+
DeveloperChristian DaumeRONNY MAJANI

In-app purchases

None

NASDS

No in-app purchases

3 purchases

Dive Kit

Subscriptions1
  • Skuba Tools Pro Monthly1 Month trial$4.991 Month
One-time2
  • Tip$0.99
  • Decompression Planner$24.99

Questions

Is NASDS free?
NASDS is free to download, with no in-app purchases.
Is Dive Kit free?
Dive Kit is free to download, with in-app purchases available.
Do NASDS or Dive Kit have ads?
Neither NASDS nor Dive Kit shows ads.
Which is updated more often, NASDS or Dive Kit?
NASDS ships an update monthly, and Dive Kit every 4 days. Most recently, NASDS was updated on October 25, 2026 and Dive Kit on November 5, 2026.

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