Erebus App

Erebus is the complete dive management companion for recreational and technical divers. Whether you're logging your first open water dive or planning a multi-gas technical descent, Erebus keeps everything in one place — beautifully organised and always offline-capable. DIVE LOGGING Log dives manually or import from Subsurface, UDDF, and CSV files. Capture depth profiles, gas mixes, temperatures, buddy details, surface conditions, and personal notes. View interactive dive profile charts and gas pressure gauges. Sync directly from compatible dive computers via Bluetooth. DIVE PLANNING Full Bühlmann ZHL-16C decompression planning with gradient factors. Interactive profile chart, real-time tissue saturation tracking, CNS/OTU monitoring, and PDF export. Supports open circuit and CCR configurations. GEAR MANAGEMENT Build detailed gear profiles with exposure suit, BCD, cylinder, and weighting configurations. Manage your full equipment inventory and link gear to individual dive logs. CYLINDER CERTIFICATIONS Track visual inspections, hydrostatic tests, and oxygen cleaning across UK/EU, US, and custom standards. Get push notification reminders before tests are due. Log test history with facility details and pass/fail records. DIVE SITES Browse and manage your personal dive site library with search and filters. Wreck sites include automatic Wikipedia integration for historical information. View site conditions, depth ranges, and access notes. PHOTOS & VIDEO Capture and organise your underwater photography in a masonry gallery. Link photos and videos to specific dives, mark favourites, and add captions. Videos are automatically compressed before upload. CERTIFICATIONS TRACKER Manage all your diving certifications in one place. Scan and store certification cards, track your course wishlist, and keep instructor details to hand. DIVE TRIPS Plan and log dive holidays with trip type, operator, location, and date range details. Link trips directly to your dive logs. COMPRESSOR MANAGEMENT Track diving compressors with runtime hours, service intervals, fill logs, and test certificates. DIVE BUDDIES Build a buddy list with photos and notes. Link buddies to individual dives to build a history of who you've dived with. GAS CALCULATOR Calculate best mix, fill capacity, gas blending sequences, and cylinder density. Real gas mode uses NIST REFPROP data for accurate high-pressure calculations. WEATHER FORECASTS 7-day marine and atmospheric forecasts based on dive site location, so you can plan surface conditions before you travel. ALWAYS OFFLINE CAPABLE All your data syncs automatically when online and stays fully accessible when you're offline — on a liveaboard, at a remote site, or anywhere connectivity is limited. Available in English, French, German, Spanish, Italian, and Swedish. A 14-day free trial is included. Erebus Premium unlocks the full feature set with a monthly or annual subscription. https://erebus.nammu-tech.com/terms https://erebus.nammu-tech.com/privacy