# Dive Toolbox vs Turn Pressure

The clearest difference is in-app purchases: Turn Pressure at none against Dive Toolbox's 2. Turn Pressure also leads on update cadence (every 2 days vs every 6 days). Dive Toolbox's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Dive Toolbox sells 2 in-app purchases, starting at $5.99 per month. Turn Pressure asks for nothing beyond the download.

Dive Toolbox ships an update every 6 days, Turn Pressure every 2 days. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Dive Toolbox | Turn Pressure |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/turn-pressure-dive-planner/id6801749776/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 2 days** |
| Monetization | — | Free |
| Size | 33 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Onosia](https://appshunter.io/developer/1880704645) | [RUSTAM ISMAILOV](https://appshunter.io/developer/6799582362) |

## What reviewers say

### Dive Toolbox

[App page](https://appshunter.io/ios/app/dive-toolbox/id6759796903)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $5.99 | per month |
| Premium Lifetime | $24.99 | one-time |


### Turn Pressure

[App page](https://appshunter.io/ios/app/turn-pressure-dive-planner/id6801749776)

This app calculates dive turn pressure, minimum gas reserves, and bottom times for recreational divers. It provides dynamic planning based on specific dive parameters, cylinder size, and gas mixes, offering detailed ascent profiles and tracking personal gas consumption rates.

**Highlights:** Dynamic turn pressure calculation, Minimum gas reserve for two divers, Bottom time limit based on gas or NDL, Repeat dive planning with surface interval, Detailed ascent profiles, Personal SAC rate tracking, Metric and imperial unit support

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

**In-app purchases:** none


## Frequently asked questions

### Is Dive Toolbox free?

Dive Toolbox is free to download, with in-app purchases available.

### Is Turn Pressure free?

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

### Do Dive Toolbox or Turn Pressure have ads?

Neither Dive Toolbox nor Turn Pressure shows ads.

### Which is updated more often, Dive Toolbox or Turn Pressure?

Dive Toolbox ships an update every 6 days, and Turn Pressure every 2 days. Most recently, Dive Toolbox was updated on October 11, 2026 and Turn Pressure on October 8, 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.*