# Mares App vs Dive Shearwater

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.

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.

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.

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

## The numbers

| Metric | Mares App | Dive Shearwater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (190 ratings)](https://appshunter.io/ios/app/mares-app/id1625641063/reviews)** | [1.6 (5 ratings)](https://appshunter.io/ios/app/dive-shearwater/id6751863035/reviews) |
| Number of ratings | **190** | 5 |
| Positive reviews | **48.1% of reviews** | 8.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 203 MB | 107 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Head Watersports S.p.A.](https://appshunter.io/developer/1193522423) | [Shearwater Research](https://appshunter.io/developer/1164234361) |

## What reviewers say

### Mares App

[App page](https://appshunter.io/ios/app/mares-app/id1625641063)

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:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Snorkel Only | $2.99 | per month |
| Full Featured Month (Housing Only) | $6.99 | per month |
| Full Featured Month (Ultra Only) | $6.99 | per month |
| MARES Fully Featured Monthly | $8.99 | per month |
| Full Featured Yearly (Housing Only) | $49.99 | per year |
| Full Featured Yearly (Ultra Only) | $49.99 | per year |
| MARES Fully Featured Yearly | $69.99 | per year |
| MARES Fully Featured Yearly Family | $119.99 | per year |


### Dive Shearwater

[App page](https://appshunter.io/ios/app/dive-shearwater/id6751863035)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*