Mares App vs Dive Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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 As soon as it is outdated, you will receive a message regarding the newest firmware to download.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
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | Mares App | Dive Converter |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.5 (183 ratings) — better | 4.0 (5 ratings) |
| Positive reviews | 47.5% of reviews | 66.7% of reviews — better |
| Number of ratings | 183 — better | 5 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Requires iOS | 16.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 247 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Head Watersports S.p.A. | Carsten Heinelt |
Customer experience
Mares App
Dive Converter
In-app purchases
Mares App
- 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 moreShow fewer
- 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
Dive Converter
No in-app purchases









