Press kit

Logo, screenshots, the facts and the story behind Loggerfish, free to use in coverage of the app.

The facts

What it is: A dive logbook that turns your dives into numbers you can act on, and lets you take every one of them with you.
What it does: Log dives on the boat with no signal. Bring an old logbook across from files: an SSI export, Garmin FIT, UDDF from other logbook apps, any spreadsheet, or Apple Health on iPhone. A dashboard of your own diving: air consumption over time, the season against your own target, cost per dive, seasons and a life list of what you have seen. Planners for nitrox, no-stop limits, gas blending, best mix, minimum gas, weighting, buoyancy swing and decompression, as planning aids.
What it does not do: With Pro, Loggerfish can also download dives from a Mares Sirius or a Shearwater Peregrine TX over Bluetooth on iPhone; other dive computers are not supported yet, so for those it reads exported files. It is not a dive computer.
Your data: Export to Excel or UDDF and a full backup are free on every plan, for good. No ads, no selling data, no training AI on anyone's dives.
Platforms: In any browser, on desktop or phone. iPhone and iPad app, coming to the App Store. Android later.
Price: Free: unlimited dives, every import and export, backups and every planner. Pro, €4.90 a month or €29 a year, adds the advanced analytics and the dive-site maps, with a 14-day trial for every new account. Founding offer: Pro for life at €99, paid once, until 500 are sold or for 90 days after launch (to 4 February 2027), whichever comes first.
Languages: English, German, Spanish, French and Polish.
Launch: 6 November 2026.
Made by: Felix Rief (Rief Digital Apps), Hamburg, Germany. One person, independent.
Web: loggerfish.com · app.loggerfish.com
Press contact: support@loggerfish.com

The story, in 60 seconds

Loggerfish is made by one person. Felix Rief is a diver in Hamburg, Germany, and he built the logbook he wanted for himself: one that shows what years of diving add up to. Air consumption over seasons rather than per dive, the year so far against his own target, what a dive really costs once the gear, the courses and the trips are counted.

And one that never keeps a diver's logbook hostage. Logging is given away free by agencies and hardware makers, but getting your own dives back out is often hard. In Loggerfish, export to Excel and a full backup are free on every plan, for good. It is the promise the product rests on.

It reads the files other logbooks and dive apps export, so years of dives come across in a few minutes. It works on the boat with no signal, it speaks five languages, and it is independent: no agency or dive-computer maker behind it, no ads, no selling data.

In his own words

I've logged dives for years, and every app told me what happened on a single dive, never what all of them add up to. So I built the logbook I wanted: one that shows how my air consumption changes over the seasons and what a dive really costs. And it lets anyone take their dives with them, free, for good.

Felix Rief

Logo

The logo on a light and on a dark background, and the app icon. SVG for print and scaling, PNG for everything else. Please do not recolour or redraw it.