About this app

Vessel is the smartest way to track your daily hydration. Unlike other apps that count every drink equally, Vessel uses real peer-reviewed research to show you how hydrating your drinks actually are. WHY VESSEL IS DIFFERENT • Scientific hydration multipliers — coffee counts as 92% hydrating (Killer et al. 2014), beer at -10%, spirits at -50% • Beautiful ocean-depth progress ring that deepens as you drink more • Built-in health warnings for excess caffeine, alcohol, and overhydration FEATURES • Fast logging — one tap to add water, coffee, tea, beer, wine, and more • Daily progress ring with smooth water wave animation • Celebration when you hit your goal • 12 achievement badges for streaks and milestones • Week / Month / 3-Month charts with color-coded drink breakdown • Hydration Science page with cited research • Smart reminders at your chosen hours • Apple Health sync for water and caffeine • Body weight-based goal calculator • Dark mode support • Ounces, milliliters, and liters HEALTH WARNINGS Vessel alerts you when: • Caffeine exceeds FDA's 400mg/day limit • Alcohol intake crosses CDC moderate drinking guidelines • Water intake approaches levels that risk hyponatremia (over 3.5L/day) YOUR DATA, PRIVATE All drink data stays on your device. Optional Apple Health sync is fully under your control. No accounts, no tracking, no ads. Drink smarter, not just more.

Latest release

What’s New

Version 1.5 Apr 25, 2026

VESSEL PRO • Vessel Pro subscription — unlock insights, caffeine tracking, health warnings, achievements, Apple Health sync, and full drink history • 7-day free trial on all plans iPAD SUPPORT • Native iPad layout with adaptive design • Sidebar navigation on iPad • Optimized for all iPad sizes ONBOARDING • New guided setup with hydration facts, name personalization, and weight-based goal calculator • Smart Quick Add that learns your most frequent drinks IMPROVEMENTS • Better dark mode colors • Smoother animations • Bug fixes and performance improvements

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