Comparison

Mares App vs DiveSync

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 As soon as it is outdated, you will receive a message regarding the newest firmware to download.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

DiveSync

Features
Read full description

Introduction: DiveSync is a free mobile app that connects your mobile device to your dive computer to manage and organize your precious dive data. DiveSync enables users to view, edit, and analyze previous dives, add locations and photos, and easily update the dive computer firmware. DiveSync is compatible with select dive computers from Cressi, Genesis, OceanPro, Sherwood, and XS Scuba. Key Features: Dive Log: Download, view, and manage your dive logs from your dive computer to your mobile device. Automatically download dives or manually add them to create an extensive logbook. Data: Analyze data such as dive time, max depth, tissue loading, ascent rates, and much more. Dive profiles can be viewed in both graphical and tabular formats. Planning: Set alerts for time and depth, set gas mixes, and manage your dive profile. Customization: Add memos, dive spots, dive photos, and observations. Dive Spots: Accurately add dive locations via Apple Maps. DC Control: Set device settings for your dive computer and perform firmware updates. Bluetooth: Transfer dive data from your dive computer using Bluetooth 5.0 ensuring fast download and upload times. Compatibility: Currently supports Cressi Davinci, XS Scuba Skiff, Oceanpro Spirit, Genesis Graviton, Sherwood Logic+ and Sherwood Wisdom 5 Supported Mobile Platforms: iOS. Summary: DiveSync is a free iOS dive log app that allows you to access and download your dive logs using a streamlined interface and user experience. Automatically download new dives or manually input information with compatible Bluetooth LE enabled dive computers from Cressi, XS Scuba, and Oceanpro. (Currently compatible models include the Cressi Davinci, XS Scuba Skiff, Oceanpro Spirit, Genesis Graviton, Sherwood Logic+, and Sherwood Wisdom 5) To get support from the developers, please use the in-app menu to “Send to Tech Support” and reach out to support@divesync.io. Additional troubleshooting and FAQs may be found directly at the DiveSync website. (www.divesync.io) DiveSync is free and all data is stored locally on your device. Your dive data is not used for any commercial purpose and is not monetized.

Screenshots

Mares App4 screens
DiveSync4 screens

Verdict

The call

The clearest difference is in-app purchases: DiveSync at none against Mares App's 8. Mares App's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement 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. DiveSync asks for nothing beyond the download.

UpkeepUpdate frequency

Mares App ships an update every 3 weeks, DiveSync every 2 weeks. The most recent releases landed on September 30, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 8 level
Mares App versus DiveSync: the parameters behind the verdict, then further details
ParameterMares AppDiveSync
PriceFreeFree
Rating4.5 (183 ratings) — better—
Positive reviews47.5% of reviews—
Number of ratings183 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.616.5 — better
Further details — not scored
Size247 MB39 MB
Age rating4+4+
DeveloperHead Watersports S.p.A.Proasia Design Co. Ltd

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

DiveSync

No in-app purchases

Questions

Is Mares App free?
Mares App is free to download, with in-app purchases available.
Is DiveSync free?
DiveSync is free to download, with no in-app purchases.
Do Mares App or DiveSync have ads?
Neither Mares App nor DiveSync shows ads.
Which is updated more often, Mares App or DiveSync?
Mares App ships an update every 3 weeks, and DiveSync every 2 weeks. Most recently, Mares App was updated on September 30, 2026 and DiveSync on September 20, 2026.

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