Baltic Deco Planner vs Subsurface
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Baltic Deco Planner
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.
- 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
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Tool for planning staged decompression dives for technical divers. Supports open circuit and closed circuit rebreathers, multi-level and repetitive dives, nitrox, trimix, altitude adjustments, metric and imperial measurements. Keeps track of gas consumption, OTUs and CNS. Per dive configurable ascent/descent rates, last stop/stop interval settings and RMV/MOR. Any combination of OC and CCR planning is possible (CCR dives with OC levels/deco etc.). One tap access to lost-gas, bailout, deeper & longer contingency profiles. Constantly displays updated plan details as changes are made, and uses color highlighting to suggest best mixes. Dive plans can be stored in a bookmark folder for convenient reuse. Plans can also be exported via email or pasted into any other app. Features both VPM-B (based on Erik C. Bakers work) with configurable conservatism and ZHL16-B with configurable gradient factors for calculating decompression profiles. Also supports VPM-B/GFS. Please see www.balticdecoplanner.com for more info, bug tracking and support.
Subsurface
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.
- Mobile dive log management
- Edit dive data
- Download from Bluetooth LE dive computers
- Optional cloud synchronization
- Open-source and free
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Subsurface-mobile is an iOS dive log application based on Subsurface, the best free open source dive log application available on Windows, Mac and Linux. Subsurface-mobile allows you to access your dive log on your tablet or phone, edit the data and even download new dive information from many Bluetooth LE enabled dive computers. Using a free Subsurface Cloud Storage account you can synchronize your dive data with the Subsurface desktop application (while significantly increasing the usefulness, the cloud account is not required to use Subsurface-mobile). To get support from the developers, please use the in-app menu entry "Ask for support" Please check out the Subsurface-mobile user manual: https://subsurface-divelog.org/documentation/subsurface-mobile-v3-user-manual (also available from within the app) Subsurface-mobile is free and open source. No ads, no commercial anything. And it comes with free cloud storage (if you decide to use that - it's optional). Your data aren't used for anything, nothing gets monetized.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Baltic Deco Planner | Subsurface |
|---|---|---|
| Price | $18.99 | Free — better |
| Rating | 4.7 (49 ratings) — better | 4.5 (48 ratings) |
| Positive reviews | 91.3% of reviews — better | 63.3% of reviews |
| Number of ratings | 49 — better | 48 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #147 — better | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 11.0 — better | 17 |
| Further details — not scored | ||
| Size | 4 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Eskil Olsen | Dirk Hohndel |
Customer experience
Baltic Deco Planner
Subsurface
In-app purchases
Baltic Deco Planner
No in-app purchases
Subsurface
No in-app purchases
Questions
Is Baltic Deco Planner free?
Is Subsurface free?
Which has better reviews, Baltic Deco Planner or Subsurface?
Do Baltic Deco Planner or Subsurface have ads?
Which is updated more often, Baltic Deco Planner or Subsurface?
Other comparisons
