Dive Calculator vs Tech Dive
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | Dive Calculator | Tech Dive |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (24 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 24 — better | 2 |
| Update frequency | Every 12 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 6.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Zanthic Automation Inc. | Skytip LLC |
Customer experience
Dive Calculator
Tech Dive
In-app purchases
Dive Calculator
- EANx Calculations$0.99
- Trimix Calculations$0.99
Tech Dive
- Plus Monthly$0.991 Month
- Plus Annual$7.991 Year
Questions
Is Dive Calculator free?
Is Tech Dive free?
Which has better reviews, Dive Calculator or Tech Dive?
Do Dive Calculator or Tech Dive have ads?
Which is updated more often, Dive Calculator or Tech Dive?
Other comparisons















