HydroSleep was built by a father tracking his son's first years — and shared with every parent who deserves a tracker that respects their privacy.

Designed for babies and toddlers from 6 months to 3 years. No subscriptions. No ads. No data harvesting.

NO ACCOUNT. NO CLOUD. YOUR DATA STAYS AT HOME.
All data is stored exclusively on your device. If you have a home NAS (Synology or any WebDAV server), HydroSleep syncs your family's data directly over your local network — never through any third-party cloud. When both parents have the app installed, real-time push notifications keep you instantly in sync the moment your baby falls asleep or wakes up.

SLEEP TRACKING & PREDICTIONS
Track every nap and night sleep with a live timer. Log sleep mood, notes and teething status. View weekly and monthly charts to spot patterns. Get automatic advice when naps run too long or start too late — and see predicted wake windows so you always know when the next nap should begin.

BREASTFEEDING & HYDRATION
Log breastfeeding sessions with a built-in timer — track left and right side separately so you always know which side is next. Your daily hydration goal is calculated automatically from your weight, height and breastfeeding status. Log each cup with one tap and get gentle reminders when you're falling behind.

CALENDAR & DAY HISTORY
See everything that happened on any given day in one place — sleep, temperature, medications, feeding and diary notes. Color-coded dots on the calendar give you an instant overview of your baby's health history at a glance.

CHILD HEALTH, ALL IN ONE PLACE
- Temperature log with fever timeline chart
- Medication tracker with automatic interval warnings (Paralen, Nurofen, and more)
- Vaccination schedule — track completed doses and set reminders
- Teething map — mark each tooth as teething or erupted
- Growth charts with WHO percentile curves (weight, height, head circumference)
- Milestones diary — first steps, first smile, first word
- First words log

PAEDIATRICIAN-READY PDF REPORTS
Generate a PDF covering up to 30 days of illness history — temperatures, medications, sleep and hydration — and share it directly from your phone. No app needed on the doctor's side.

DESIGNED FOR REAL FAMILY LIFE
- Supports multiple children
- Real-time partner sync via push notifications — even when the other phone's screen is off
- Works fully offline — NAS sync queues changes and uploads when connected
- Available in Slovak, English, Czech, German and Spanish