Comparison

Alert Diver vs Dive Calculator

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

Head to head
About

Alert Diver

Explore dive industry insights, research, and safety information. Discover underwater photography, travel destinations, and marine environmental topics. This app provides valuable content for divers and enthusiasts.

Highlights
  • Dive industry research
  • Medical information
  • Dive safety guidelines
  • Underwater photography
  • Dive travel guides
  • Marine environmental topics
Features
Read full description

Alert Diver magazine, the dive industry’s leading publication, features DAN’s core content of research, education, medical information and dive safety. In addition, Alert Diver showcases underwater photography, dive travel and marine environmental topics. Divers Alert Network (DAN) is a nonprofit, 501(c)(3) dive safety organization. DAN's mission is to help divers in need of emergency medical assistance and to promote dive safety through research, education, products and services. Published quarterly, Alert Diver is a benefit to members of DAN; its companion website, AlertDiver.com, is available to all. If you are a current DAN member (DAN America region), everything offered in this app is included in your membership and free to you!

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.

Screenshots

Alert Diver4 screens
Dive Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: Dive Calculator at 100% against Alert Diver's 25%. Dive Calculator also leads on rating (4.6 vs 4.0) and ratings volume (24 vs 4). Alert Diver's advantage is in-app purchases (none vs 2) and update cadence (every 6 months vs every 12 months). 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 Calculator sells 2 one-off in-app purchases. Alert Diver asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Dive Calculator holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Dive Calculator has 24 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 25% of Alert Diver's written reviews are positive against 100% of Dive Calculator's.

UpkeepUpdate frequency

Alert Diver ships an update every 6 months, Dive Calculator every 12 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

Scorecard7 real differences · 3 level
Alert Diver versus Dive Calculator: the parameters behind the verdict, then further details
ParameterAlert DiverDive Calculator
PriceFreeFree
Rating4.0 (4 ratings)4.6 (24 ratings) — better
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings424 — better
Update frequencyEvery 6 months — betterEvery 12 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.06.0 — better
Further details — not scored
Size92 MB7 MB
Age rating4+4+
DeveloperDivers Alert NetworkZanthic Automation Inc.

Customer experience

Alert Diver

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews36 reviews
Positive25.0%
Neutral8.3%
Negative66.7%

Dive Calculator

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

In-app purchases

None

Alert Diver

No in-app purchases

2 purchases

Dive Calculator

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

Questions

Is Alert Diver free?
Alert Diver is free to download, with no in-app purchases.
Is Dive Calculator free?
Dive Calculator is free to download, with in-app purchases available.
Which has better reviews, Alert Diver or Dive Calculator?
Dive Calculator is rated higher. Alert Diver averages 4.0 out of 5 from 4 ratings, while Dive Calculator averages 4.6 from 24 ratings.
Do Alert Diver or Dive Calculator have ads?
Neither Alert Diver nor Dive Calculator shows ads.
Which is updated more often, Alert Diver or Dive Calculator?
Alert Diver ships an update every 6 months, and Dive Calculator every 12 months. Most recently, Alert Diver was updated on October 14, 2026 and Dive Calculator on October 8, 2026.

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