# Dive Log vs Gas Blender Toolkit

The clearest difference is price: Gas Blender Toolkit at $2.99 against Dive Log's $14.99. Gas Blender Toolkit also leads on in-app purchases (none vs 10) and update cadence (every 9 days vs monthly). Dive Log's advantage is rating (4.7 vs 3.0) and review sentiment (84% vs 60%). On ads, device support and iOS requirement there is nothing between them.

Dive Log costs $14.99 and Gas Blender Toolkit $2.99 up front. Dive Log sells 10 one-off in-app purchases. Gas Blender Toolkit asks for nothing beyond the download.

Dive Log holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Dive Log has 107 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 84% of Dive Log's written reviews are positive against 60% of Gas Blender Toolkit's.

Dive Log ships an update monthly, Gas Blender Toolkit every 9 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | Dive Log | Gas Blender Toolkit |
| --- | --- | --- |
| Price | $14.99 | **$2.99** |
| Rating | **[4.7 (107 ratings)](https://appshunter.io/ios/app/dive-log/id301049600/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490/reviews) |
| Number of ratings | **107** | 2 |
| Positive reviews | **84.0% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 33 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greg Mclaughlin](https://appshunter.io/developer/284919983) | [Oleg Gurevich](https://appshunter.io/developer/1467768489) |

## What reviewers say

### Dive Log

[App page](https://appshunter.io/ios/app/dive-log/id301049600)

Log your SCUBA dives with detailed information, including GPS coordinates and dive buddy details. Supports metric and imperial units, and integrates with desktop software for comprehensive dive history management.

**Highlights:** SCUBA diving logbook, GPS coordinate capture, Dive buddy integration, Dive data and statistics, Metric and Imperial units, Dive computer data import, Bluetooth LE transfer

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suunto Bluetooth Download | $2.99 | one-time |
| Mares Bluetooth Download | $2.99 | one-time |
| Shearwater Download | $2.99 | one-time |
| bluebuddy Download | $2.99 | one-time |
| SCUBAPRO Download | $2.99 | one-time |
| Pelagic Bluetooth Download | $2.99 | one-time |
| Cressi Bluetooth Download | $2.99 | one-time |
| Ratio Bluetooth Download | $2.99 | one-time |
| Halcyon Bluetooth Download | $2.99 | one-time |
| DCbuddy Support | $4.99 | one-time |


### Gas Blender Toolkit

[App page](https://appshunter.io/ios/app/gas-blender-toolkit/id1467768490)

This comprehensive toolkit assists scuba divers in calculating and blending various gas mixtures like trimix, nitrox, and heliox. It offers features for both partial pressure and continuous blending, cost calculation, and utilizes ideal and real gas models for accuracy. Optimized for larger screens, it serves as a successor to a previous diving application.

**Highlights:** Partial pressure blending, Continuous blending, Trimix, nitrox, heliox calculations, Ideal and real gas models, Cost calculation, Top off from storage

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dive Log free?

Dive Log costs $14.99, and also offers in-app purchases.

### Is Gas Blender Toolkit free?

Gas Blender Toolkit costs $2.99, with no in-app purchases.

### Which has better reviews, Dive Log or Gas Blender Toolkit?

Dive Log is rated higher. Dive Log averages 4.7 out of 5 from 107 ratings, while Gas Blender Toolkit averages 3.0 from 2 ratings.

### Do Dive Log or Gas Blender Toolkit have ads?

Neither Dive Log nor Gas Blender Toolkit shows ads.

### Which is updated more often, Dive Log or Gas Blender Toolkit?

Dive Log ships an update monthly, and Gas Blender Toolkit every 9 days. Most recently, Dive Log was updated on November 6, 2026 and Gas Blender Toolkit on November 6, 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.*