A hydration tracker you’ll actually want to come back to.

Track water in one tap, get gentle reminders, build streaks, and celebrate every small win with Octi - your animated hydration companion.

Download on the App Store

Free to download. Core hydration features stay free.

Octi Flow main screen showing hydration progress, Octi, and the one-tap add water button
One-tap loggingOcti reactsGentle progress

More than a water counter

Tracking shows the numbers. Octi helps you keep the habit.

Octi Flow is designed around the part that matters after the first day: making the routine feel calm, personal, and worth returning to.

01

One-tap tracking

Log a drink without interrupting your day.

02

Gentle reminders

Stay on track without pressure or notification overload.

03

Positive reinforcement

Octi reacts and makes small wins feel meaningful.

Quick water tracking

Log water in one tap.

Choose your usual amount or select a different portion. Your progress updates instantly, and Octi reacts.

Octi Flow portion selector with 100, 150, and 200 milliliter options
Octi Flow showing updated hydration progress and an encouraging Octi message

A companion, not just a tracker

A companion that reacts to your day.

Octi celebrates when you drink, responds to your progress, and brings personality to a routine that usually feels mechanical.

Brought to life by usAlive on your phone

Progress without pressure

See the habit taking shape.

Follow daily progress, keep a streak going, and unlock achievements as the routine becomes more consistent.

Daily progress

See how today’s hydration goal is moving at a glance.

Streaks

Notice the days when the routine starts to stick.

Achievements

Mark meaningful milestones without turning them into pressure.

Free at the core

Everything needed for the habit is free. Premium makes Octi yours.

Orange Octi, the free companion in Octi Flow

Free

Build the hydration habit.

  • Unlimited water tracking
  • Reminders and daily progress
  • Streaks and core achievements
  • Octi’s basic reactions
Purple Octi wearing a yellow bow, an example of Premium personalization

Premium

Make the companion yours.

  • Skins and accessories
  • Premium themes
  • Additional achievements
  • Expanded personalization
Kate and Eugene, the two-person team building Octi Flow in Barcelona

Built independently in Barcelona

Designed and built by a two-person studio.

We design, code, animate, test, and ship Octi Flow ourselves. The details stay close to the people making them.

Meet the team

Ready to meet Octi?

Start a hydration habit that feels easier to return to.

Download on the App Store

Free to download on iPhone.