Reef vs 4divers

Every dive deserves a beautiful record. Reef is the simplest, cleanest scuba diving logbook for iOS — built for recreational divers who want their dive history to look as good as it felt underwater. LOG YOUR DIVES Depth, duration, water temp, visibility, air consumption, tank pressure, dive site and notes. Tap in at the surface while it's fresh. Works fully offline on liveaboards and remote reefs. TRACK YOUR STATS Total dives, deepest dive, longest bottom time and top dive sites by count. Watch your logbook grow with every trip. ATTACH PHOTOS Turn each dive entry into a visual story. Add photos straight from your camera roll to any log entry. DIVE BUDDY Log who you dived with. Build your buddy history across every trip and location. DIVE SITES & MAP Pin exactly where you dived on a map. Open your dive map anytime to see every logged site across the world — your personal underwater atlas. GEAR LOCKER Store all your dive equipment in one place. Track service intervals by dive count and time — Reef tells you when your BCD, regulator, wetsuit or mask is due for a service before it becomes a problem. CERTIFICATIONS Store all your dive certifications in one place. See at a glance which are valid, expiring soon or expired — always ready to show at the dive centre. No social network. No subscription required to log dives. Just a beautiful, private logbook — always in your pocket. Compatible with PADI, SSI, NAUI, CMAS and all major certification agencies. Terms of Use (EULA): https://reeflogbook.app/terms

Log the dive, not just the data. Welcome to 4divers, the beautiful, fast, and intuitive digital logbook designed for scuba divers who want a seamless way to record their underwater stories. Whether you are a recreational beginner, a technical deep diver tracking complex gas mixes, a professional Divemaster, or a passionate freediver—4divers replaces clunky paper logs and rigid spreadsheets with a stunning, streamlined experience. Best of all, we are completely agency-agnostic, meaning your history belongs to you, not a single training organization. Key Features Built For Divers: The Ultimate Dive Logbook (Core Experience) - 60-Second Logging: Built for quick, one-handed use while at a dive site or on a liveaboard. Open the app and log a dive instantly. - Deep Data Tracking: Record dive site, date, depth, duration, water temperature, visibility, entry/water type, gear setups, weights, cylinders, gas mixes (Air/Nitrox), and personal notes. - At-a-Glance Dive Cards: Review past dives instantly with clean, intuitive visual chips showcasing key metrics. - Lifetime Stats Dashboard: Track your total dive count, cumulative hours underwater, and maximum depth ever achieved. Smart Certification Manager - Instant Auto-Import: Search and import your verified PADI, SSI, or SDI/TDI certifications by name. - Digital Cert Wallet: Display your cards in a beautiful UI featuring official agency logos and immersive underwater designs. - Manual Backups: Upload photos of physical cards from any agency worldwide (NAUI, CMAS, etc.) so you always have proof of training. - All Levels Welcome: Full support from Open Water up to Instructor, Technical, and Freediver specialties. Buddies & Social Layer - Log Your Crew: Tag exactly who you dived with on every single entry. - Shared History: See a running tally of how many total dives you’ve completed with each buddy over time. - Frictionless Connection: Add friends instantly using personal QR codes or quick invite links via WhatsApp and SMS. Dive Site & Center Discovery - Global Search: Browse thousands of worldwide dive sites by name, city, or country. - Smart Filters: Filter locations by experience level, marine life, and geography, or use the "Been Here" filter for spots you've already logged. - Find Local Shops: Locate nearby PADI 5-Star facilities, SSI centers, or independent operators sourced from global directories. Why Choose 4divers? - Agency Agnostic: We proudly support all divers, regardless of where or how you certified. - Frictionless Onboarding: Sign in instantly with Google—no separate passwords to memorize. - Custom Preferences: Toggle between metric and imperial units, and customize exactly which fields appear on your log forms. - Privacy First: Your location and profile data are protected. No data sold, no cross-app tracking.