Built by two people. Growing with every update.

We’re Kate and Eugene - a husband-and-wife indie team in Barcelona. We design, code, animate, and ship Octi Flow ourselves, sharing the process as it grows.

Follow the build

Kate and Eugene working together on Octi Flow at a laptop

CodeDesignAnimationiOS

How it started

It started with a simple question.

Could a hydration tracker feel less like a utility - and more like a companion?

Most trackers already knew how to count water. We wanted to explore the part that comes after the first download: what makes someone want to return tomorrow? That question became Octi Flow.

Every part of the app - from the Unity systems and interface to Octi’s character, animation, and iOS release - is shaped inside our two-person team.

Pencil sketch of the first Octi Flow interface — ThenThe first working idea

Final Octi Flow interface with Octi and hydration tracking — TodayA companion on the App Store

The people behind Octi

Two people. One shared vision.

Everything in Octi Flow, from the visuals and animation to the code and releases, is created by the two of us.

Co-founder · Unity developer & product lead

Kate Filimonova

Kate builds Octi Flow in Unity, from its core systems and interface to testing and release.

Her focus: turning complex features into simple, reliable interactions.

Co-founder · Product designer & animator

Eugene Filimonov

Eugene shapes Octi’s look, movement, and personality, creating a companion that feels expressive and alive.

His focus: making every interaction clear, engaging, and full of character.

Octi Flow, now and next

Octi Flow is live. And we are still improving it.

Octi Flow is already available on the App Store. We keep making it better based on real feedback and what we learn from everyday use.

Available now

Octi Flow for iPhone

Track your water, set reminders, keep your streak going, earn achievements, and watch Octi react to your progress.

Improving now

A smoother everyday experience

We are refining the controls, animations, and small details that make logging water feel quick, clear, and rewarding.

Exploring next

More ways to make Octi yours

We are exploring new reactions and customization options that could make Octi feel even more personal.

Updated August 2026

Behind the details

A closer look at how Octi Flow is made.

Two small parts of the app that took a lot of testing, iteration, and care.

Interface design

Making water logging easier with one hand

We tested several layouts before choosing controls that feel quick, clear, and comfortable in daily use.

Character animation

How Octi reacts to your progress

Pose, timing, and expression turn a short animation into feedback that feels encouraging and alive.

Follow the real build

Watch Octi Flow grow with us.

New features, animation experiments, design decisions, mistakes, and small wins - shared by the two people building it.

See the latest updates Talk to the team

Or choose your favorite platform in the social links below.