Dive Calculator vs Octavius
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
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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.
Octavius
This app helps scuba divers calculate the optimal amount of weight needed for safe underwater dives. It provides essential calculations to ensure proper buoyancy and a comfortable diving experience.
- Weight calculation for scuba diving
- Optimal buoyancy guidance
- Underwater dive planning
- User-friendly interface
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Scuba dive calculator: calculate the proper amount of weight you should carry underwater
Screenshots
Verdict
The clearest difference is in-app purchases: Octavius at none against Dive Calculator's 2. Octavius also leads on update cadence (monthly vs every 12 months). Dive Calculator's advantage is iOS requirement (6.0 vs 16.6). On price, review sentiment, ads and monetization model 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. Octavius asks for nothing beyond the download.
Dive Calculator ships an update every 12 months, Octavius monthly. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.
| Parameter | Dive Calculator | Octavius |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (26 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 26 — better | — |
| Update frequency | Every 12 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 6.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 7 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Zanthic Automation Inc. | Yoash Offer |
Customer experience
Dive Calculator
Octavius
In-app purchases
Dive Calculator
- EANx Calculations$0.99
- Trimix Calculations$0.99
Octavius
No in-app purchases
Questions
Is Dive Calculator free?
Is Octavius free?
Do Dive Calculator or Octavius have ads?
Which is updated more often, Dive Calculator or Octavius?
Other comparisons
