Software · Education & science

Subsurface

Dive logbook application.

Completely free
Windows, macOS, Linux, Android and iOS
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-2.0 — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Official plan pages (pricing, licence, terms), Flathub
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows, macOS, Linux, Android and iOSEstablished by Android: Unspecified source · iOS: Unspecified source · Linux: Flathub, Unspecified source · macOS: Unspecified source · Windows: Unspecified source
Publisher: The Subsurface development team
Latest version: 6.0.5707-CICD-release (11 September 2026)
Latest activity: 19 September 2026
Source code: github.com/subsurface/subsurface

At a glance

Subsurface is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-2.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

Subsurface is an open source dive logbook for scuba, rebreather, and free divers. Track your dives by logging locations (with GPS coordinates), gear, exposure protection used, divemasters and dive buddies, plus your own notes and ratings for each dive. Subsurface also allows you to plan your dives, by providing a comprehensive dive planner that includes support for multiple gases, deco planning, and more. Dives can be downloaded from a variety of dive computers, entered manually, or imported from other dive log applications. Features: Detailed dive profiles with tank pressure curves and gas analysis Calculated SAC rate, partial pressures of O2, N2 and He, and decompression information Built-in dive planner Printable detailed log books with profiles and notes Localized in about 20 languages

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 10 November 2026
Facts collected from Unspecified source (platforms) — 10 November 2026
Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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