Coming soon

Zen Otto
A complete log of your baby, built for the hour you actually use it.

Tap the dial when a feed starts and tap it again when it ends. Zen Otto keeps feeds, bottles, diapers, sleep, pumping, weight, solids, first allergen exposures and vaccinations, and it is built to be used one handed in the dark. No account, no analytics, and nothing leaves your phone.

iPhone

Coming soon

Designed around the real workflow

Tap the dial when a feed starts and tap it again when it ends. Every control sits in the bottom half of the screen, where a thumb reaches while the other arm is holding the baby.

Screenshots

See it
in context.

Real screens from the app, so you can see how it looks before you download.

Features

What Zen Otto
is built to do.

The essentials, each built for one clear job.

One tap, one hand, in the dark

Tap the dial when a feed starts and tap it again when it ends. Every control sits in the bottom half of the screen, where a thumb reaches while the other arm is holding the baby.

Everything in one place

Feeds left and right, bottles in milliliters or ounces, diapers, pumping, sleep, weight over time, solids, first allergen exposures, and vaccination records with the dose, product, batch and site.

It forgives you

Fed an hour ago and only opening the app now? Log it at the time it happened. Every deletion offers an undo, and everything can be edited afterwards.

Reference, not verdicts

The app writes down what happened and draws no conclusion about your child. No growth percentiles and no immunisation schedule, on purpose. Every judgement stays with you and your doctor.

More than one pair of hands

More than one baby, each with a separate log. A handover screen for whoever takes over. Export, so the record is yours to take anywhere.

Private by construction

No account, no sign in, no analytics, and no advertising. Everything stays on your phone and it works with no connection at all.

Why this app

Why pick Zen Otto?

A baby log that behaves like an instrument rather than a feed of notifications.

Built for 3am: nothing on screen is brighter than it has to be
Logging is free forever, and never behind a price
No account and no analytics, so nothing you log leaves the phone
Vaccination records with the dose, product, batch, site and any reaction
A plain weight line, with no percentiles and no judgement about your child

Questions

Frequently asked
questions.

Short answers for the questions people ask most about Zen Otto.

Does Zen Otto give medical advice?

No. It shows your own log, and separately it shows published reference ranges with the publisher named on screen. It never compares the two and it never draws a conclusion about your child. It is not a medical device.

What does it cost?

Three days free, then a plan. Monthly, yearly, or one payment that never renews. Everything you log stays on your phone either way, and nothing is ever deleted because a subscription ended.

Where is my data kept?

On your phone. There is no account and no server. Nothing you log is sent anywhere, and the app works with no connection at all.

Can two parents use it?

The log lives on one phone today. There is a handover screen that tells whoever takes over exactly where things stand.

Does it tell me which vaccinations are due?

No, and that is deliberate. Zen Otto records what was given rather than predicting what is next. Immunisation schedules change, and a copy compiled into an app cannot be trusted to stay current, so the app keeps the record and leaves the schedule to your doctor.

Legal