# Z dive log vs Boat HIN Decoder

Z dive log and Boat HIN Decoder both sit at 5.0 stars, but that hides the real split: 100% of Boat HIN Decoder's written reviews are positive against 58% of Z dive log's. Boat HIN Decoder also leads on update cadence (every 9 days vs every 4 months) and device support (3 vs 1). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for Z dive log against 5.0 for Boat HIN Decoder. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 58% of Z dive log's written reviews are positive against 100% of Boat HIN Decoder's.

Z dive log ships an update every 4 months, Boat HIN Decoder every 9 days. The most recent releases landed on September 19, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Z dive log | Boat HIN Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/z-dive-log/id1202116382/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/boat-hin-decoder/id6474098761/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 58.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 40 MB | 36 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [SCUBAPRO ASIA LTD.](https://appshunter.io/developer/1202116381) | [Allytech LLC](https://appshunter.io/developer/1551622966) |

## 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


### Boat HIN Decoder

[App page](https://appshunter.io/ios/app/boat-hin-decoder/id6474098761)

Decode any boat's Hull Identification Number (HIN) with this app. It provides comprehensive Coast Guard manufacturing details, including manufacturer, model year, and production dates. The app features intelligent error correction for accurate results.

**Highlights:** Decode all three HIN formats, Access Coast Guard manufacturing details, Intelligent error correction, User-friendly interface, Provides manufacturer information, Identifies boat model year

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z dive log free?

Z dive log is free to download, with no in-app purchases.

### Is Boat HIN Decoder free?

Boat HIN Decoder is free to download, with no in-app purchases.

### Which has better reviews, Z dive log or Boat HIN Decoder?

Z dive log and Boat HIN Decoder are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Z dive log or Boat HIN Decoder have ads?

Neither Z dive log nor Boat HIN Decoder shows ads.

### Which is updated more often, Z dive log or Boat HIN Decoder?

Z dive log ships an update every 4 months, and Boat HIN Decoder every 9 days. Most recently, Z dive log was updated on September 19, 2026 and Boat HIN Decoder 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.*