Reef

Reef is a simple, clean scuba diving logbook for Android, built so recreational divers can keep an attractive, private record of every dive. The app captures essential dive details - depth, duration, water temperature, visibility, air consumption, tank pressure, dive site and notes - and lets you attach photos and record who you dived with. It works fully offline for liveaboards and remote reefs and tracks statistics, gear service intervals and certifications, so you can review progress and stay ready for the next trip without a subscription.

Key Features

Reef lets you log detailed dive data including depth, duration, water temperature, visibility, air consumption, tank pressure, site and notes, and attach photos to any entry. Record dive buddies to build a history of who you dived with, pin exact dive sites on an interactive map, and store gear and certification records with service interval tracking. View comprehensive stats such as total dives, deepest dive, longest bottom time and top sites by count. All core functions are available offline so you can enter dives on liveaboards and in remote locations.

Advantages

Reef offers a focused interface tailored for recreational divers who want a visually pleasing, private logbook without a subscription. The app is private by design with no social network features and it keeps your data under your control. Gear locker and certification tracking provide service reminders and expiry visibility so you can stay dive-ready.

Disadvantages

No built-in social network or community features for sharing dives directly from the app. Reef is aimed at recreational diving and may not cover specialized needs of technical or commercial diving professionals.