# Deep Tools vs Dalton

The clearest difference is rating: Deep Tools at 4.6 against Dalton's 4.0. Deep Tools also leads on ratings volume (93 vs 1) and iOS requirement (17.0 vs 26.0). Dalton's advantage is update cadence (fortnightly vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Deep Tools sells 3 in-app purchases, starting at $7.99 per month and Dalton sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Deep Tools holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Deep Tools has 93 ratings behind it against 1, so its average is the more settled of the two.

Deep Tools ships an update every 2 months, Dalton fortnightly. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Deep Tools | Dalton |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (93 ratings)](https://appshunter.io/ios/app/deep-tools/id1476093876/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/dalton-dive-gas-calculator/id6759679904/reviews) |
| Number of ratings | **93** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 13 MB | 13 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Deep Blue d.o.o.](https://appshunter.io/developer/1476093875) | [Tools for Divers, LLC](https://appshunter.io/developer/1880150704) |

## What reviewers say

### Deep Tools

[App page](https://appshunter.io/ios/app/deep-tools/id1476093876)

This app is a comprehensive tool for divers, offering dive planning, logging, and gas blending. It supports recreational, technical, and rebreather diving with advanced decompression planning and dive computer integration. Plan complex dives, log your adventures, and mix gases with precision.

**Highlights:** Decompression dive planning (Bühlmann ZH-L16), Dive log with Shearwater import, Nitrox and Trimix gas blending, Multiple dive calculators, Metric and imperial unit support, Multi-level and repetitive dive planning

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Monthly | $7.99 | per month |
| Subscription Yearly | $22.99 | per year |
| Lifetime Subscription | $49.99 | one-time |


### Dalton

[App page](https://appshunter.io/ios/app/dalton-dive-gas-calculator/id6759679904)

This app calculates critical dive gas parameters like MOD, EAD, and END, showing all derivations. It offers advanced planning tools for dive profiles and bottom time, with sharing capabilities and home/lock screen widgets for quick access. All core gas calculations are free, with advanced features available via a one-time purchase.

**Highlights:** MOD calculation, Equivalent Air Depth (EAD), Equivalent Narcotic Depth (END), Best Mix calculation, Gas Properties at depth, Return Number calculation (Pro), Dive Profile Advisor (Pro), Bottom Time Calculator (Pro)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dalton Pro | $14.99 | one-time |


## Frequently asked questions

### Is Deep Tools free?

Deep Tools is free to download, with in-app purchases available.

### Is Dalton free?

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

### Which has better reviews, Deep Tools or Dalton?

Deep Tools is rated higher. Deep Tools averages 4.6 out of 5 from 93 ratings, while Dalton averages 4.0 from 1 ratings.

### Do Deep Tools or Dalton have ads?

Neither Deep Tools nor Dalton shows ads.

### Which is updated more often, Deep Tools or Dalton?

Deep Tools ships an update every 2 months, and Dalton fortnightly. Most recently, Deep Tools was updated on November 7, 2026 and Dalton on November 9, 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.*