# Diving Log vs Mares App

The clearest difference is rating: Mares App at 4.5 against Diving Log's 2.0. Mares App also leads on update cadence (every 3 weeks vs every 9 months) and ratings volume (183 vs 3). Diving Log's advantage is in-app purchases (none vs 8). On price, review sentiment, 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. Diving Log asks for nothing beyond the download.

Mares App holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: Mares App has 183 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 50% of Diving Log's written reviews are positive against 47% of Mares App's, so the app with the better star average is not the one people write more warmly about.

Diving Log ships an update every 9 months, Mares App every 3 weeks. Both last shipped on September 21, 2026.

## The numbers

| Metric | Diving Log | Mares App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/diving-log/id1091064630/reviews) | **[4.5 (183 ratings)](https://appshunter.io/ios/app/mares-app/id1625641063/reviews)** |
| Number of ratings | 3 | **183** |
| Positive reviews | **50.0% of reviews** | 47.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 247 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [TABATA CO.,LTD.](https://appshunter.io/developer/1091064629) | [Head Watersports S.p.A.](https://appshunter.io/developer/1193522423) |

## What reviewers say

### Diving Log

[App page](https://appshunter.io/ios/app/diving-log/id1091064630)

This app serves as a customizable digital logbook for scuba divers. It allows users to record detailed dive information, including depth, time, location, and environmental conditions. Users can also add photos, instructor signatures, and export logs for social sharing.

**Highlights:** Customizable dive logbook, Record dive details (depth, time, temp), Map dive point locations, Add photos and instructor signatures, Export logs to social media, Graph display of depth intervals

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Diving Log free?

Diving Log is free to download, with no in-app purchases.

### Is Mares App free?

Mares App is free to download, with in-app purchases available.

### Which has better reviews, Diving Log or Mares App?

Mares App is rated higher. Diving Log averages 2.0 out of 5 from 3 ratings, while Mares App averages 4.5 from 183 ratings.

### Do Diving Log or Mares App have ads?

Neither Diving Log nor Mares App shows ads.

### Which is updated more often, Diving Log or Mares App?

Diving Log ships an update every 9 months, and Mares App every 3 weeks. Most recently, Diving Log was updated on September 21, 2026 and Mares App on September 21, 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.*