Free
In-App Purchases

Details

  • Released
  • Updated
  • July 5, 2022
  • July 23, 2026

Features

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About

Transform your Apple Watch Ultra into a dive computer, recording dives directly on your wrist. Log scuba, freediving, and technical dives, manage dive sites, and track underwater wildlife sightings. Share your adventures with dive buddies and keep your equipment details organized.

Apple Watch Ultra dive computer integration
Digital dive logbook
Dive site database and management
Underwater wildlife tracking
Dive buddy sharing
Dive equipment management
Firmware updates
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What's New in Mares App

1.2.13

July 23, 2026

Firmware update improvements Minor improvements and bug fixes

Subscription plans

MARES Dive App Monthly

3-day free trial followed by monthly subscription

$8.991 Month
3 Days trial
How to cancel Mares App subscription ⁉️

User reviews

Disappointed

I am extremely disappointed with this app and the overall experience. It came highly recommended by other divers, which is why I chose it, but unfortunately it has not lived up to those expectations.

From the beginning, I’ve been unable to get my Apple Watch Ultra to sync properly with the app. As a result, none of my dives are being logged, which defeats one of the primary reasons I downloaded and purchased this setup. I’ve spent a significant amount of time troubleshooting the issue on my own, trying every solution I could find, yet nothing has resolved the problem.

What has been even more frustrating is the complete lack of customer support. I reached out to support via email, clearly explained the issue, and never received a response—not even an acknowledgment that my request had been received. When users experience technical issues, especially with an app that’s relied upon for dive logging, timely communication should be a priority. Even a brief email letting customers know the issue is being investigated would go a long way.

I rarely leave negative reviews because I understand that technical problems can happen. However, when those problems are combined with little or no customer support, it becomes difficult to recommend the product. Reliability and customer service are just as important as the features themselves.

Based on my experience, I cannot recommend using this app with the Apple Watch Ultra. I sincerely hope the developers improve both the app’s stability and their customer support, because right now the experience has been frustrating and disappointing.

Update: I finally received a reply from support and the solution worked temporarily. I logged 8 dives this past weekend and my app plus watch only logged 3 dives. Lucky I had my backup computer on as well! All I’m asking is for the app to work exactly as you stated!!!!!! I do not like being dry!
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Bitte Air Integration ermöglichen

Sonst schon sehr gut

Response from developer

Air integration is not possible. The hardware is provided by Apple and it does not include the possibility to connect a pressure transmitter.

Insgesamt gut, Sync und Logbuch haben Luft nach oben

Insgesamt eine sehr gute App, die mir zusammen mit der Apple Watch Ultra besser gefällt als die Konkurrenz. Lediglich der Sync des Logbuches ist Käse und das Bearbeiten im Logbuch fehlt. Manchmal werden Tauchgänge geloggt und beendet bevor man abtaucht. Gleiches wenn man im Pool ist. Ansonsten geht es in die richtige Richtung. Die App fragt zwar das Recht an Workouts in Apple Health zu schreiben, tut dies aber nicht.
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Prinzipiell gut mit Luft nach oben

Die App ist für mich gut gestaltet und ausreichend mit Funktionen ausgestattet.

Die vollen 5 Sterne würde die App von mir bekommen wenn folgende Punkte noch nachgereicht würden:

1) Logbuch-Datenexport in ein Format, das auch andere Logbuch-Apps oder -Software am PC nutzt.

2) Tauchcomputer-Handbuch ( z.B. Puck 4) fehlen in der App. Nur die Anleitung zur Apllewatch ist da.

3) Probleme bei Firmware-Update. Sollen wohl behoben sein. Kann ich aber mangels neuer Firmware nicht testen.
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Disappointed

I am extremely disappointed with this app and the overall experience. It came highly recommended by other divers, which is why I chose it, but unfortunately it has not lived up to those expectations.

From the beginning, I’ve been unable to get my Apple Watch Ultra to sync properly with the app. As a result, none of my dives are being logged, which defeats one of the primary reasons I downloaded and purchased this setup. I’ve spent a significant amount of time troubleshooting the issue on my own, trying every solution I could find, yet nothing has resolved the problem.

What has been even more frustrating is the complete lack of customer support. I reached out to support via email, clearly explained the issue, and never received a response—not even an acknowledgment that my request had been received. When users experience technical issues, especially with an app that’s relied upon for dive logging, timely communication should be a priority. Even a brief email letting customers know the issue is being investigated would go a long way.

I rarely leave negative reviews because I understand that technical problems can happen. However, when those problems are combined with little or no customer support, it becomes difficult to recommend the product. Reliability and customer service are just as important as the features themselves.

Based on my experience, I cannot recommend using this app with the Apple Watch Ultra. I sincerely hope the developers improve both the app’s stability and their customer support, because right now the experience has been frustrating and disappointing.
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Developer apps

FAQ

What does the Mares App do?

The Mares App transforms your Apple Watch Ultra into a dive computer, allowing you to record dives directly on your wrist. It also functions as a digital logbook for various diving types, helps manage dive sites, track wildlife, and store equipment details.

What are the key features of the Mares App?

Key features include Apple Watch Ultra dive computer integration, a digital logbook for Scuba, Freediving, Extended Range, and Rebreather dives, a dive site database with custom site options, wildlife sighting tracking, dive buddy sharing, and digital equipment management.

How much does the Mares App cost?

The Mares App itself is free to download. However, an in-app purchase is required to unlock its full functionality as a dive computer for the Apple Watch Ultra.

What devices are compatible with the Mares App?

The app is designed to work with the Apple Watch Ultra as a dive computer. It also supports downloading dive data from selected Mares dive computers, including models like Sirius, Horizon, Genius, Quad, Puck, and Smart series.

Can I use this app for freediving?

Yes, the app supports logging Freediving dives in addition to Scuba, Extended Range, and Rebreather dives. You can record your freedives, manage dive sites, and track your underwater experiences.