Waterline is a water tracker built around one idea: logging a drink should feel as satisfying as drinking it.

Most hydration apps treat logging as a chore — a form to fill out, a number to update. Waterline turns it into a small moment: tap to log, watch the water rise with a natural ripple animation. It's the kind of interaction you don't mind repeating six or ten times a day, because it's genuinely nice to use — not because a streak is guilting you into it.

WHAT'S INSIDE
• One-tap logging with your own custom drink sizes — glass, bottle, whatever you actually use. No limit on how many you save.
• A daily goal that's yours to set — a quick estimate based on your weight and activity level, or just pick your own number. Editable anytime.
• A history view that actually shows your week, not just a number — daily bars and a 7-day trend.
• Streaks that celebrate milestones (3, 7, 30, 100 days) without turning your progress into pressure.
• Reminders that respect your schedule — set your own wake/sleep window, and reminders automatically stop once you've hit your goal for the day. No hounding.

NO ACCOUNT REQUIRED
Waterline doesn't ask you to sign up, log in, or hand over an email address. Your data stays on your phone. If you switch phones, your progress can restore automatically through your existing Google account backup — no new account to create.

FREE, WITH HONEST OPTIONS
Waterline is free to use, supported by ads that never interrupt the moment you're trying to log a drink. A one-time Lifetime purchase removes ads and unlocks every premium feature — advanced stats, extra reminder schedules, and additional themes — for good. Prefer to pay monthly or yearly instead? An optional subscription unlocks that exact same full bundle. Neither is ever required to use the app's core features.

Built by someone who got tired of hydration apps that feel like spreadsheets. Give it a try.