# Fish Hawk vs Mercury Diagnostic App

The clearest difference is iOS requirement: Mercury Diagnostic App at 10.0 against Fish Hawk's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fish Hawk ships an update every 22 months, Mercury Diagnostic App every 11 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Fish Hawk | Mercury Diagnostic App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/mercury-diagnostic-app/id1491041580/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 11 months** |
| Monetization | Free | Free |
| Size | 1 MB | 73 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Grayden Outdoors LLC](https://appshunter.io/developer/972529357) | [Mercury Marine LLC](https://appshunter.io/developer/1777822540) |

## What reviewers say

### Fish Hawk

[App page](https://appshunter.io/ios/app/fish-hawk/id972529358)

This app provides real-time trolling speed, water temperature, and downrigger depth data directly to your iOS device. It also features a Catch Log for recording fishing details and allows easy sharing of catch information with friends.

**Highlights:** Real-time trolling speed display, Water temperature readings, True running depth of downrigger weight, Catch Log for recording fish details, Share catch log information with friends

**Features:** macOS Compatibility

**In-app purchases:** none


### Mercury Diagnostic App

[App page](https://appshunter.io/ios/app/mercury-diagnostic-app/id1491041580)

This app allows Mercury dealer technicians to perform basic diagnostics on SmartCraft® engines. It provides live engine data, fault information, runtime history, and custom data lists. Full functionality requires a license key and a VesselView Mobile module.

**Highlights:** View live SmartCraft® engine data, Create custom data lists, Obtain active faults, View runtime history, Enter maintenance records, Wireless communication via Bluetooth

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Fish Hawk free?

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

### Is Mercury Diagnostic App free?

Mercury Diagnostic App is free to download, with no in-app purchases.

### Do Fish Hawk or Mercury Diagnostic App have ads?

Neither Fish Hawk nor Mercury Diagnostic App shows ads.

### Which is updated more often, Fish Hawk or Mercury Diagnostic App?

Fish Hawk ships an update every 22 months, and Mercury Diagnostic App every 11 months. Most recently, Fish Hawk was updated on October 24, 2026 and Mercury Diagnostic App on October 24, 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.*