Comparison

Mares App vs Dive Converter

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 As soon as it is outdated, you will receive a message regarding the newest firmware to download.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

Easily export your dive logs from Oceanic+ and SSI/mares into the Universal Dive Data Format (UDDF). This app translates dive information accurately and supports importing third-party UDDF files. It also offers features like reverse geocoding for dive locations and surface time calculation.

Highlights
  • Export Oceanic+ and SSI/mares dives to UDDF
  • Reverse geocoding for dive locations
  • Calculate surface time
  • Backup and restore dives
  • Import third-party UDDF files
  • Filter and merge dives
Features
Read full description

Dive Converter allows users to retrieve their Oceanic+ and SSI/mares dives and export selected dives in Universal Dive Data Format (UDDF). The app works on iOS (iPhone and iPad) and on macOS. We have taken special care of making sure that all information of your dive that is also supported by UDDF is translated correctly. The generated UDDF files have been tested with multiple dive log programs on iOS and macOS. Features: - support for downloading dives, referenced equipment, user profile, buddy information from Oceanic+ - reverse geocoding of longitude/latitude to also get an address (at least country and region) where your dive took place - calculation of surface time (not contained in Oceanic+ data) - export all information according to latest UDDF standard - backup and restore of all dives in JSON and UDDF format - import of 3rd party UDDF files - filtering of dives by category, time frame, rating, type, and text - merging of dives - deletion of dives (a restore is not possible because Oceanic+ does not allow overwriting of deleted dives) - conversion of DataTrak, TravelTrak, and Logtrak logbooks to UDDF logbooks (UWATEC and ScubaPro dive computers) Please note: You have to have an Oceanic+ account with email/password.

Screenshots

Mares App4 screens
Dive Converter4 screens

Verdict

The call

The clearest difference is price: Mares App at Free against Dive Converter's $1.99. Mares App also leads on rating (4.5 vs 4.0) and ratings volume (183 vs 5). Dive Converter's advantage is in-app purchases (none vs 8) and review sentiment (67% vs 47%). On 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

Mares App is free to download; Dive Converter costs $1.99 up front. Mares App sells 8 in-app purchases, starting at $2.99 per month. Dive Converter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mares App holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Mares App has 183 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 47% of Mares App's written reviews are positive against 67% of Dive Converter's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mares App ships an update every 3 weeks, Dive Converter every 2 months. The most recent releases landed on September 26, 2026 and September 10, 2026 respectively.

Scorecard8 real differences · 2 level
Mares App versus Dive Converter: the parameters behind the verdict, then further details
ParameterMares AppDive Converter
PriceFree — better$1.99
Rating4.5 (183 ratings) — better4.0 (5 ratings)
Positive reviews47.5% of reviews66.7% of reviews — better
Number of ratings183 — better5
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac
Requires iOS16.6 — better18.6
Further details — not scored
Size247 MB9 MB
Age rating4+4+
DeveloperHead Watersports S.p.A.Carsten Heinelt

Customer experience

Mares App

All ratings183 ratings
Positive89.6%
Neutral4.9%
Negative5.5%
Written reviews99 reviews
Positive47.5%
Neutral12.1%
Negative40.4%

Dive Converter

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews9 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

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 Converter

No in-app purchases

Questions

Is Mares App free?
Mares App is free to download, with in-app purchases available.
Is Dive Converter free?
Dive Converter costs $1.99, with no in-app purchases.
Which has better reviews, Mares App or Dive Converter?
Mares App is rated higher. Mares App averages 4.5 out of 5 from 183 ratings, while Dive Converter averages 4.0 from 5 ratings.
Do Mares App or Dive Converter have ads?
Neither Mares App nor Dive Converter shows ads.
Which is updated more often, Mares App or Dive Converter?
Mares App ships an update every 3 weeks, and Dive Converter every 2 months. Most recently, Mares App was updated on September 26, 2026 and Dive Converter on September 10, 2026.

Other comparisons