Comparison

Mares App vs Dive Shearwater

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

Head to head
About

Mares App

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.

Highlights
  • 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
Features
Read full description

APPLE WATCH ULTRA DIVE COMPUTER Transform your Ultra into a dive computer. Record dives directly on your wrist and sync automatically to the Mares App. (In-app purchase required.) DIGITAL LOGBOOK: Log your Scuba, Freediving, Extended Range and Rebreather (SCR/CCR) dives in seconds via Bluetooth. Easily share your dives via QR code. Add new dives with your device’s GPS and download your dives from selected dive computers (1*). DIVE SITES: With the help of the Mares dive site database, you can immediately assign a dive site to your logged dives. You can also add your own private dive sites and share them with your dive buddies using a QR code. You can download your dive data directly from selected Mares dive computers . WILDLIFE: A variety of local wildlife is already stored in the app for individual dive sites. This means you can immediately assign the highlights of your underwater encounters to your logged dives. Your sightings are displayed on your personal world map. DIVE BUDDIES: Easily add your dive buddies via QR code or manually in the app. Share your best dives and most exciting animal encounters with friends using the Mares app. STATISTICS: All your dives and data can be seen at a glance, including your longest or deepest dive, your average dive time and more! DIGITAL EQUIPMENT: Store important dive equipment details, including serial numbers, photos and invoices. Enter maintenance dates and keep track of when your equipment needs to be serviced. NEWS AND VIDEOS: Stay up-to-date with all the latest news and videos from the world of water sports and diving. FIRMWARE: When you connect your dive computer to the app, you will be able to confirm if you have the latest firmware. As soon as it is outdated, you will receive a message regarding the newest firmware to download. TABLES: Here you will find useful information such as decompression tables and emergency scenarios. 1* Currently available for MARES Sirius, Sirius L, Sirius Hunter, Horizon, Genius, Quad CI, Quad 2, Quad Air, Quad, Puck 4, Puck Pro EZ, Puck lite, Puck Pro, Puck Pro Plus, Puck Air 2, Smart, Smart Apnea, Smart Air Terms of Use (EULA) Mares App for Apple Watch Ultra: https://my.divessi.com/published/viewhls/awu_terms_v1/2

About

Dive Shearwater

This app helps divers log their underwater adventures with an intuitive interface. Track dive sites with interactive maps and automatically capture coordinates. It provides a streamlined experience for organizing dive history and planning future dives.

Highlights
  • Interactive dive maps
  • Automatic dive site coordinate capture
  • Streamlined user experience
  • Organized dive history
  • Gear setup refinement
  • Future dive planning tools
Features
Read full description

The world is your dive log. Built for simplicity and reliability, Dive Shearwater gives you the tools you need now and the foundation for even more powerful features in the future. More than just another dive log - With an improved user flow and streamlined experience, Dive Shearwater feels intuitive and easy to use. Keep your records organized and focus on the details that matter most to every diver. Track your adventures - Use the interactive dive maps to build your own personal guide of the places you’ve explored. Automatically capture dive site coordinates with the new Swift GPS transmitter on any air integrated Shearwater computer. Whether you're marking new dive sites, refining your gear setup, or simply keeping your dive history pristine, Dive Shearwater delivers a seamless, intuitive experience tailored for divers of all skill levels who value precision and adventure. Together, Shearwater dive computers and the Dive Shearwater app form a complete ecosystem—delivering precision in the water and clarity on land. Dive Shearwater builds on our core principles of being powerful, simple and reliable, while giving you the dive tools you need to track, reflect, and plan your next adventure with confidence.

Screenshots

Mares App4 screens
Dive Shearwater4 screens

Verdict

The call

The clearest difference is rating: Mares App at 4.5 against Dive Shearwater's 1.6. Mares App also leads on review sentiment (48% vs 8%) and ratings volume (190 vs 5). Dive Shearwater's advantage is in-app purchases (none vs 8). On price, update cadence, 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. Mares App sells 8 in-app purchases, starting at $2.99 per month. Dive Shearwater asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mares App holds the better App Store score, 4.5 against 1.6. That said, the two scores are not equally well evidenced: Mares App has 190 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 48% of Mares App's written reviews are positive against 8% of Dive Shearwater's.

UpkeepUpdate frequency

Mares App ships an update every 4 weeks, Dive Shearwater monthly. Both last shipped on October 30, 2026.

Scorecard5 real differences · 5 level
Mares App versus Dive Shearwater: the parameters behind the verdict, then further details
ParameterMares AppDive Shearwater
PriceFreeFree
Rating4.5 (190 ratings) — better1.6 (5 ratings)
Positive reviews48.1% of reviews — better8.2% of reviews
Number of ratings190 — better5
Update frequencyEvery 4 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.615.1 — better
Further details — not scored
Size203 MB107 MB
Age rating4+17+
DeveloperHead Watersports S.p.A.Shearwater Research

Customer experience

Mares App

All ratings189 ratings
Positive89.4%
Neutral4.8%
Negative5.8%
Written reviews108 reviews
Positive48.1%
Neutral12.0%
Negative39.8%

Dive Shearwater

All ratings5 ratings
Positive20.0%
Neutral0.0%
Negative80.0%
Written reviews61 reviews
Positive8.2%
Neutral8.2%
Negative83.6%

In-app purchases

8 purchases

Mares App

Subscriptions8
  • Snorkel Only$2.991 Month
  • Full Featured Month (Housing Only)3 Days trial$6.991 Month
  • Full Featured Month (Ultra Only)3 Days trial$6.991 Month
Show 5 more
  • MARES Fully Featured Monthly3 Days trial$8.991 Month
  • Full Featured Yearly (Housing Only)3 Days trial$49.991 Year
  • Full Featured Yearly (Ultra Only)3 Days trial$49.991 Year
  • MARES Fully Featured Yearly3 Days trial$69.991 Year
  • MARES Fully Featured Yearly Family3 Days trial$119.991 Year
None

Dive Shearwater

No in-app purchases

Questions

Is Mares App free?
Mares App is free to download, with in-app purchases available.
Is Dive Shearwater free?
Dive Shearwater is free to download, with no in-app purchases.
Which has better reviews, Mares App or Dive Shearwater?
Mares App is rated higher. Mares App averages 4.5 out of 5 from 190 ratings, while Dive Shearwater averages 1.6 from 5 ratings.
Do Mares App or Dive Shearwater have ads?
Neither Mares App nor Dive Shearwater shows ads.
Which is updated more often, Mares App or Dive Shearwater?
Mares App ships an update every 4 weeks, and Dive Shearwater monthly. Most recently, Mares App was updated on October 30, 2026 and Dive Shearwater on October 30, 2026.

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