Track tiny moments.

A baby tracker that works when you can barely keep your eyes open. One hand. One tap. Done.

Free to use. No credit card required.

Everything your baby needs. Nothing you don't.

Track feedings, sleep, diapers, and more. All designed for one-handed use at 3am.

Feedings

Breast, bottle, or solids. When, how much, how long.

Sleep

Start a live timer, or log after the fact when you forgot to hit start.

Diapers

Type, color, consistency. Yes, you will care about poop color.

Vaccinations

Pre-loaded schedules for the US, UK, and Vietnam. Knows what's due based on birthday.

Growth

Weight, length, head circumference plotted against WHO percentile curves.

Milestones

Rolling over, first words, crawling. Based on WHO and CDC data.

Appointments

With file attachments and reminder emails so you stop missing them.

What makes henrii different

Works offline

Log events without wifi. Everything syncs when you're back online.

Scheduled dark mode

The app dims at bedtime automatically. No flashbangs during night feeds.

Caregiver sharing

Invite grandparents, your partner, or a nanny. Everyone sees the same data.

PDF reports

Walk into your pediatrician's office with a formatted 30-day summary. One tap.

Analytics that observe

"Average feeding gap: 2.5 hours" — we show patterns, not judgments. You decide.

Bilingual from day one

English and Vietnamese. More languages coming.

How it works

Sign up

Create your free account in 30 seconds.

Add your baby

Enter their birthday and country. Vaccinations auto-populate.

Start tracking

Tap the + button. Pick the event. Done.

Free vs Premium

Core tracking is free forever. The stuff that matters most costs nothing.

Free

Everything you need to start.

Feeding, sleep, and diaper tracking
Vaccination tracker
Growth logging
Milestones checklist
Offline support
Dark mode

Best value

Premium

Coming soon

For parents who want the full picture.

Feeding, sleep, and diaper tracking
Vaccination tracker
Growth logging
Milestones checklist
Offline support
Dark mode
WHO growth percentile charts
Analytics dashboard with trends
PDF export for pediatrician visits
Caregiver invites (up to 5)
Appointment attachments

Frequently asked questions

What is henrii?+

henrii is a baby tracking app built by a sleep-deprived dad who got tired of the alternatives. It tracks feedings, sleep, diapers, vaccinations, growth, and milestones — designed so every action takes under 3 seconds, one-handed.

Is it really free?+

Core tracking (feedings, sleep, diapers, vaccinations, milestones) is free forever. Premium features like WHO growth charts, analytics dashboards, and PDF export will be available with a paid plan.

Do I need to download it from the app store?+

No. henrii is a Progressive Web App. Install it on your home screen from any browser — no app store required. Works on iPhones, Androids, tablets, and desktops.

Does it work offline?+

Yes. Log events without wifi. Everything saves locally and syncs when you're back online. Babies don't care about your signal strength.

Can my partner or family use it too?+

With a Premium plan, you can invite up to 5 caregivers — grandparents, your partner, or a nanny. Everyone sees the same data. No more "did you feed her?" texts.

Is my baby's data safe?+

Your data is encrypted, access is controlled at the database level, and your baby's information never leaves your account unless you invite someone. We don't sell data, don't run ads, and don't track your behavior.

What languages are supported?+

English and Vietnamese at launch. More languages are coming.

How is henrii different from other baby trackers?+

Most trackers look like medical devices or take six taps to log a bottle. henrii is built for exhausted parents: one-handed logging in under 3 seconds, scheduled dark mode for night feeds, offline support, and analytics that show patterns without judgment.

Built for 3am.

Join the waitlist for early access.