# Baltic Deco Planner vs Subsurface

The clearest difference is price: Subsurface at Free against Baltic Deco Planner's $18.99. Baltic Deco Planner's advantage is review sentiment (91% vs 63%) and rating (4.7 vs 4.5). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Subsurface is free to download; Baltic Deco Planner costs $18.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Baltic Deco Planner holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 49 and 48 respectively. Written reviews point the same way: 91% of Baltic Deco Planner's written reviews are positive against 63% of Subsurface's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 31, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Baltic Deco Planner | Subsurface |
| --- | --- | --- |
| Price | $18.99 | **Free** |
| Rating | **[4.7 (49 ratings)](https://appshunter.io/ios/app/baltic-deco-planner/id304464483/reviews)** | [4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews) |
| Number of ratings | **49** | 48 |
| Positive reviews | **91.3% of reviews** | 63.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#147** | — |
| Size | 4 MB | 52 MB |
| Requires iOS | **11.0** | 17 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eskil Olsen](https://appshunter.io/developer/304464486) | [Dirk Hohndel](https://appshunter.io/developer/1093217160) |

## What reviewers say

### Baltic Deco Planner

[App page](https://appshunter.io/ios/app/baltic-deco-planner/id304464483)

**Currently charting:** #147 Top Paid · Sports (US App Store)

Plan complex technical dives with support for various breathing apparatus and gas mixes. Features advanced decompression algorithms, gas consumption tracking, and contingency profile planning. Easily store, export, and reuse dive plans.

**Highlights:** Decompression dive planning, Open circuit and rebreather support, Multi-level and repetitive dive support, Gas consumption and OTU/CNS tracking, Contingency profile planning, VPM-B and ZHL16-B algorithms, Dive plan storage and export

**Features:** macOS Compatibility

**In-app purchases:** none


### Subsurface

[App page](https://appshunter.io/ios/app/subsurface-mobile/id1093217161)

This application allows divers to manage their dive logs on their mobile devices. It supports editing dive data and downloading new information from compatible dive computers. Optional cloud synchronization is available for seamless data transfer with desktop versions.

**Highlights:** Mobile dive log management, Edit dive data, Download from Bluetooth LE dive computers, Optional cloud synchronization, Open-source and free

**In-app purchases:** none


## Frequently asked questions

### Is Baltic Deco Planner free?

Baltic Deco Planner costs $18.99, with no in-app purchases.

### Is Subsurface free?

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

### Which has better reviews, Baltic Deco Planner or Subsurface?

Baltic Deco Planner is rated higher. Baltic Deco Planner averages 4.7 out of 5 from 49 ratings, while Subsurface averages 4.5 from 48 ratings.

### Do Baltic Deco Planner or Subsurface have ads?

Neither Baltic Deco Planner nor Subsurface shows ads.

### Which is updated more often, Baltic Deco Planner or Subsurface?

Baltic Deco Planner ships an update every 2 months, and Subsurface every 2 months. Most recently, Baltic Deco Planner was updated on October 31, 2026 and Subsurface on November 2, 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.*