# Z dive log vs Mares App

The clearest difference is rating: Z dive log at 5.0 against Mares App's 4.5. Z dive log also leads on in-app purchases (none vs 8) and review sentiment (58% vs 48%). Mares App's advantage is ratings volume (189 vs 1) and update cadence (every 4 weeks vs every 4 months). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Mares App sells 8 in-app purchases, starting at $2.99 per month. Z dive log asks for nothing beyond the download.

Z dive log holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Mares App has 189 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 58% of Z dive log's written reviews are positive against 48% of Mares App's.

Z dive log ships an update every 4 months, Mares App every 4 weeks. The most recent releases landed on October 6, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Z dive log | Mares App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/z-dive-log/id1202116382/reviews)** | [4.5 (189 ratings)](https://appshunter.io/ios/app/mares-app/id1625641063/reviews) |
| Number of ratings | 1 | **189** |
| Positive reviews | **58.3% of reviews** | 48.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 203 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SCUBAPRO ASIA LTD.](https://appshunter.io/developer/1202116381) | [Head Watersports S.p.A.](https://appshunter.io/developer/1193522423) |

## What reviewers say

### Z dive log

[App page](https://appshunter.io/ios/app/z-dive-log/id1202116382)

Easily manage your SCUBAPRO Z1 dive computer logs and settings. Download dive data via Bluetooth, add details like location and photos, and configure your dive computer's preferences.

**Highlights:** Download dive logs via Bluetooth, Enter and edit dive log details, Add photos to dive logs, View dive statistics at a glance, Configure Z1 dive computer settings, Save and share depth graph images

**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 Z dive log free?

Z dive 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, Z dive log or Mares App?

Z dive log is rated higher. Z dive log averages 5.0 out of 5 from 1 ratings, while Mares App averages 4.5 from 189 ratings.

### Do Z dive log or Mares App have ads?

Neither Z dive log nor Mares App shows ads.

### Which is updated more often, Z dive log or Mares App?

Z dive log ships an update every 4 months, and Mares App every 4 weeks. Most recently, Z dive log was updated on October 6, 2026 and Mares App on October 18, 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.*