# Mares App vs FishLock

The clearest difference is in-app purchases: FishLock at none against Mares App's 8. FishLock also leads on update cadence (every 5 days vs every 3 weeks). On price, ads, device support 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. FishLock asks for nothing beyond the download.

Mares App ships an update every 3 weeks, FishLock every 5 days. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Mares App | FishLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (189 ratings)](https://appshunter.io/ios/app/mares-app/id1625641063/reviews)** | — |
| Number of ratings | **189** | — |
| Positive reviews | 46.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 247 MB | 220 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Head Watersports S.p.A.](https://appshunter.io/developer/1193522423) | [Matthew Berlin](https://appshunter.io/developer/1803944185) |

## 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 |


### FishLock

[App page](https://appshunter.io/ios/app/fishlock/id6778960501)

**In-app purchases:** none


## Frequently asked questions

### Is Mares App free?

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

### Is FishLock free?

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

### Do Mares App or FishLock have ads?

Neither Mares App nor FishLock shows ads.

### Which is updated more often, Mares App or FishLock?

Mares App ships an update every 3 weeks, and FishLock every 5 days. Most recently, Mares App was updated on October 14, 2026 and FishLock on September 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.*