# Diving logbook vs Reef Tagger

The clearest difference is in-app purchases: Reef Tagger at none against Diving logbook's 3. Reef Tagger also leads on update cadence (every 5 days vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Diving logbook sells 3 in-app purchases, starting at $1.99 per month. Reef Tagger asks for nothing beyond the download.

Diving logbook ships an update monthly, Reef Tagger every 5 days. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Diving logbook | Reef Tagger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (96 ratings)](https://appshunter.io/ios/app/diving-logbook-dive-number/id949480835/reviews)** | — |
| Number of ratings | **96** | — |
| Positive reviews | 76.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 75 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Denys Dykusha](https://appshunter.io/developer/930478942) | [Cool Coral Labs Limited](https://appshunter.io/developer/1077300606) |

## What reviewers say

### Diving logbook

[App page](https://appshunter.io/ios/app/diving-logbook-dive-number/id949480835)

Easily log all your scuba diving details, from dive sites and conditions to equipment and observations. Track your dive history, including depth, time, and gas usage, with unlimited entries and an extensive dive site database. Connect with dive partners and record your underwater experiences.

**Highlights:** Unlimited dive entries, Detailed dive parameters (depth, time, gas), Dive site mapping and database, Record dive conditions and equipment, Log notes and marine life sightings, Partner confirmation for dives, Dive statistics and total dive time

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| support DiveNumber every month | $1.99 | per month |
| support DiveNumber every year | $1.99 | per year |
| support Dive Number one time | $4.99 | one-time |


### Reef Tagger

[App page](https://appshunter.io/ios/app/reef-tagger/id6783680865)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Diving logbook free?

Diving logbook is free to download, with in-app purchases available.

### Is Reef Tagger free?

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

### Do Diving logbook or Reef Tagger have ads?

Neither Diving logbook nor Reef Tagger shows ads.

### Which is updated more often, Diving logbook or Reef Tagger?

Diving logbook ships an update monthly, and Reef Tagger every 5 days. Most recently, Diving logbook was updated on November 6, 2026 and Reef Tagger on November 10, 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.*