# Diving logbook vs IDF

The clearest difference is in-app purchases: IDF at none against Diving logbook's 3. IDF also leads on device support (3 vs 1) and iOS requirement (13.4 vs 17.6). On price, update cadence 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. IDF asks for nothing beyond the download.

Diving logbook ships an update every 2 months, IDF every 6 weeks. The most recent releases landed on September 21, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Diving logbook | IDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (95 ratings)](https://appshunter.io/ios/app/diving-logbook-dive-number/id949480835/reviews)** | — |
| Number of ratings | **95** | — |
| Positive reviews | 75.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 71 MB | 8 MB |
| Requires iOS | 17.6 | **13.4** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Denys Dykusha](https://appshunter.io/developer/930478942) | [International Diving Federation sp. z o.o.](https://appshunter.io/developer/1788336335) |

## What reviewers say

### Diving logbook

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

Easily record your scuba dives with an unlimited logbook. Track dive sites, conditions, equipment, and personal notes. Connect with dive partners and view comprehensive statistics.

**Highlights:** Unlimited dive entries, Extensive dive site database, Detailed dive condition logging, Equipment and gas tracking, Dive partner confirmation, Comprehensive dive statistics, User-added dive sites

**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 |


### IDF

[App page](https://appshunter.io/ios/app/idf/id6740090312)

**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 IDF free?

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

### Do Diving logbook or IDF have ads?

Neither Diving logbook nor IDF shows ads.

### Which is updated more often, Diving logbook or IDF?

Diving logbook ships an update every 2 months, and IDF every 6 weeks. Most recently, Diving logbook was updated on September 21, 2026 and IDF on September 15, 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.*