Thalos

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