# DecoPlanner mobile vs Fathom Dive Planner

The clearest difference is in-app purchases: DecoPlanner mobile at none against Fathom Dive Planner's 2. DecoPlanner mobile also leads on iOS requirement (13.0 vs 18.0). Fathom Dive Planner's advantage is update cadence (daily vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Fathom Dive Planner sells 2 in-app purchases, starting at $6.99 per year. DecoPlanner mobile asks for nothing beyond the download.

DecoPlanner mobile ships an update every 2 months, Fathom Dive Planner daily. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DecoPlanner mobile | Fathom Dive Planner |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 74 MB | 8 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Global Underwater Explorers Inc.](https://appshunter.io/developer/1459213336) | [Total Immersion](https://appshunter.io/developer/408473253) |

## What reviewers say

### DecoPlanner mobile

[App page](https://appshunter.io/ios/app/decoplanner-mobile/id1580563324)

Plan complex dive profiles using advanced decompression models. Track multiple gases, manage dive buddies, and visualize dive data with detailed graphs. Choose the version that suits your diving certification level.

**Highlights:** Open/Closed/Passive Semi-Closed Circuit planning, ZH-L16 / VPM-B decompression models, Gas tracking for multiple gases and dive buddies, Gas mixing (partial pressure & continuous blending), Dive profile and tissue compartment graphs, Diving level selection (Rec 1 to Unlimited CCR)

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

**In-app purchases:** none


### Fathom Dive Planner

[App page](https://appshunter.io/ios/app/fathom-dive-planner/id6775766574)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fathom Premium - Annual | $6.99 | per year |
| Fathom Premium - Lifetime | $17.99 | one-time |


## Frequently asked questions

### Is DecoPlanner mobile free?

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

### Is Fathom Dive Planner free?

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

### Do DecoPlanner mobile or Fathom Dive Planner have ads?

Neither DecoPlanner mobile nor Fathom Dive Planner shows ads.

### Which is updated more often, DecoPlanner mobile or Fathom Dive Planner?

DecoPlanner mobile ships an update every 2 months, and Fathom Dive Planner daily. Most recently, DecoPlanner mobile was updated on October 24, 2026 and Fathom Dive Planner on October 25, 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.*