Comparison

Dive Calculator vs Tech Dive

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

Head to head
About

Dive Calculator

This app provides comprehensive scuba diving calculations, including basic, nitrox, and trimix gas mixes. It supports both metric and imperial units, and allows for gas volume and cost calculations for blending and top-ups. Results can be easily copied for documentation.

Highlights
  • Basic, Nitrox, and Trimix calculations
  • Gas volume and cost calculations
  • Top-up and bleed down mix calculations
  • Metric and imperial unit support
  • Oxygen narcotic/non-narcotic selection
  • Copy results to clipboard
Features
Read full description

A wide variety of scuba based calculations for all levels of divers. Basic Calculations Include: -ATA -SAC / RMV rates -Tank volume / Pressure rating -Basic unit conversions Nitrox Calculations Include: -EANx best mix -Integrated top-up and bleed down mix calculations -What if top–up -EANx mix planning Trimix Calculations Include: -Integrated top-up and bleed down mix calculations -What if top–up -Trimix planning -Best Trimix -Heliair All blending and top up pages include gas volume and cost calculations. Trimix gas fill orders can be changed by simply dragging the icons to select the fill order. Oxygen can be selected as narcotic / non-narcotic on the appropriate calculation pages. Results can be copied to the clipboard in a text format for use in E-mails, messages or other forms of documentation. All pages support metric and imperial units. Many pages include both metric and imperial units.

About

Tech Dive

This app helps plan scuba dives with various calculators for gas, depth, and air consumption. It supports metric and imperial units and offers advanced features through an in-app purchase.

Highlights
  • Dive planning calculators
  • Gas and air consumption calculations
  • Metric and imperial unit support
  • Depth and EAD calculations
  • Enriched Air-Nitrox mix calculation
  • Unit conversion tools
Features
Read full description

Diving should be safe and fun. We develop Tech Dive as a simple tool to plan and calculate your next underwater adventure. Tech Dive is an advanced scuba dive calculator and supports metric and imperial units. This app continues to grow as a one-stop technical diver tool. A technical decompression (DECO) planner will be incorporated with the future PRO version. DIVE CALCULATORS Tool for accurate dive planning, education, and training. ▸ Surface Air Consumption - SAC ▸ Respiratory Minute Volume - RMV ▸ Maximum Bottom Time ▸ Gas Required ▸ Maximum Operating Depth - MOD ▸ Equivalent Air Depth - EAD ▸ Best Enriched Air-Nitrox (EAN) Mix ▸ Equivalent Narcotic Depth - END (Plus only) ▸ Trimix Gas Planner (Plus Only) ▸ Cylinder Fill (Plus only) ▸ Cylinder Top-Up (Plus only) CONVERSION TOOLS ▸ Metric / Imperial Units ▸ Absolute Depth (Atmospheric Depth) ▸ Cylinder Volume / Pressure ▸ Partial Pressure PLUS FEATURES (IN-APP PURCHASE) Tech Dive Plus includes all basic features plus: ▸ Equivalent Narcotic Depth - END Calculator ▸ Trimix Gas Planner ▸ Cylinder Fill calculations (Air, Nitrox, Trimix) ▸ Cylinder Top-Up calculations ▸ Export/share all calculation results as PDF SUBSCRIPTION TERMS Tech Dive is free to download and the basic features free to use. A paid upgrade to Plus or PRO versions provide access to premium features and additional tools. We may offer trial subscriptions that give limited time access to paid features and premium content for the duration of the trial period. Trial subscriptions automatically expire and the app will revert back to the basic version thereafter. No data is lost but access and use of premium features will no longer be available.

Screenshots

Dive Calculator4 screens
Tech Dive4 screens

Verdict

The call

The clearest difference is update cadence: Tech Dive at every 4 weeks against Dive Calculator's every 12 months. Tech Dive also leads on rating (5.0 vs 4.6). Dive Calculator's advantage is monetization model (free vs free with in-app purchases) and ratings volume (24 vs 2). On price, review sentiment, ads and in-app purchases 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 Calculator sells 2 one-off in-app purchases and Tech Dive sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Tech Dive holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Dive Calculator has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Dive Calculator ships an update every 12 months, Tech Dive every 4 weeks. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 5 level
Dive Calculator versus Tech Dive: the parameters behind the verdict, then further details
ParameterDive CalculatorTech Dive
PriceFreeFree
Rating4.6 (24 ratings)5.0 (2 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings24 — better2
Update frequencyEvery 12 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS6.0 — better17.0
Further details — not scored
Size7 MB16 MB
Age rating4+4+
DeveloperZanthic Automation Inc.Skytip LLC

Customer experience

Dive Calculator

All ratings24 ratings
Positive91.7%
Neutral4.2%
Negative4.2%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Tech Dive

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Dive Calculator

One-time2
  • EANx Calculations$0.99
  • Trimix Calculations$0.99
2 purchases

Tech Dive

Subscriptions2
  • Plus Monthly$0.991 Month
  • Plus Annual$7.991 Year

Questions

Is Dive Calculator free?
Dive Calculator is free to download, with in-app purchases available.
Is Tech Dive free?
Tech Dive is free to download, with in-app purchases available.
Which has better reviews, Dive Calculator or Tech Dive?
Tech Dive is rated higher. Dive Calculator averages 4.6 out of 5 from 24 ratings, while Tech Dive averages 5.0 from 2 ratings.
Do Dive Calculator or Tech Dive have ads?
Neither Dive Calculator nor Tech Dive shows ads.
Which is updated more often, Dive Calculator or Tech Dive?
Dive Calculator ships an update every 12 months, and Tech Dive every 4 weeks. Most recently, Dive Calculator was updated on September 21, 2026 and Tech Dive on September 24, 2026.

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