Marlin

5 Downloads 10 Views v1.3 22.08 MB 4.1+

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(22.08 MB)

Editor's Overview

Marlin is a science & education application developed by Fiona Wille, packaged as a single Android APK of version 1.3 weighing in at 22.08 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 22.08 MB, so it installs quickly even on modest connections.
This build is signed by "Fiona Wille" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Marlin: Marine Species ID & Life List

Ever spotted a fish, ray, or jellyfish while diving or snorkeling and wondered what it was? Marlin helps you identify marine life on the spot, learn more about it, and build your own personal life list of every species you encounter.

Spot it, look it up, and add it to your life list — built for everything that lives in the ocean.

WHAT YOU CAN DO

Identify species near you
See which marine species are commonly recorded near your current location, or anywhere you choose, powered by real observation data from the iNaturalist community.

Search and learn
Look up any marine species by name, or explore by classification, tapping through families and groups to discover related species. Each species page brings together photos, a range map, a seasonality chart, a Wikipedia summary, and IUCN Red List conservation status.

Build your life list
Log every sighting with notes, photos, and a precise location. Your life list keeps a running record of every species you've encountered, ready to revisit any time.

See your sightings on a map
"My Map" plots every sighting you've logged, color-coded by group (fish, sharks and rays, mollusks, jellyfish, marine mammals, and more), so you can see where and what you've found at a glance.

Make it yours
Choose a light, dark, or system theme, and set a manual location for logging sightings from a past trip.

PRIVACY BY DESIGN

Marlin doesn't ask you to create an account. There is no tracking, no analytics, and no advertising. Your life list, photos, and notes stay on your device, under your control, with manual export/import whenever you want it.

Whether you're a diver, snorkeler, beachcomber, or simply curious about what's living in the water near you, Marlin turns every encounter into something you can identify, learn from, and remember.

Details

Version	v1.3
Size	22.08 MB
Developer	Fiona Wille
Category	Science & Education
Package	com.marlinid.marlin
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	5

Frequently Asked Questions

Is Marlin free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Marlin require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Marlin safe to install?
We link to the exact APK published by Fiona Wille. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Marlin?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Marlin

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.marlinid.marlin.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Marlin» by Fiona Wille and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.