Thalos vs Puffin

Thalos is the all-in-one dive app built for serious divers and instructors. Whether you're planning a deep technical dive or running an open water course, Thalos has everything you need — and it works fully offline when it matters most. DIVE LOGBOOK Log every dive with depth, time, gas, conditions, marine life sightings, buddy signatures, and photos. Full version history keeps your records safe. Organize dives into trips and track your personal certifications. DIVE SITES & EMERGENCY PLANS Access 510+ dive sites with detailed emergency action plans, nearest hyperbaric chambers, and emergency contacts — all stored locally so they're available even without signal. 9 DIVE CALCULATORS • Bühlmann ZHL-16C decompression planner with gradient factors • Gas planner and gas blending • SAC rate, turn pressure, weight calculator • Dive tables, unit converter, altitude diving EMERGENCY MODE One tap gets you to emergency procedures and critical contacts. Works 100% offline. INSTRUCTOR MODULE Manage students, run courses with 26 built-in templates, track skill sign-offs, generate paperwork (liability waivers, medical forms, training dives), and issue certifications. SOCIAL FEED & TANK TAPS Share your dives, follow other divers, and give Tank Taps — the diver's way of saying nice dive. COMMUNITY Discover and post dive classes, trips, and dive centers. Instructors can manage enrollments directly in the app. SUBSCRIPTION Thalos requires a subscription after a 1-month free trial. $2.99/month or $19.99/year. Terms of Use: https://blackflagdivecenter.github.io/Thalos/terms.html Privacy Policy: https://blackflagdivecenter.github.io/Thalos/privacy.html

Keep your dive history in one logbook you can open anywhere. Import computer logs, add dives manually, and review depth, gas, and site details when you need them. • Your dives, organized — browse your catalog with depth sparklines and quick access to every entry • Import from your computer — bring in Shearwater .db, UDDF, and dctool-supported logs; share from Shearwater on iPhone • Every dive, full detail — date, depth, duration, site, location, notes, and gas profiles • Trips as sessions — group dives, merge or split sessions, and auto-group by geolocation • See where you dived — map dive sites, filter by location, and set geo when logging Sign in with email, Apple, or Google. View logbook and session statistics with category filters. Try guest mode with bundled sample dives before you create an account. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/