Cubdays is a baby tracker that changes as your baby does.

Newborn days are about feeds, sleep and nappies. A few months later it is solids and growth. Later still it is meals, potty training and milestones. Most trackers show you the same screen through all of it. Cubdays follows your baby's age: the quick-log bar, the daily summary and the charts all shift as they grow, so the thing you need is already on screen at three in the morning.

WHAT YOU CAN LOG

• Breastfeeding, with a live timer or entered by hand, left and right
• Bottles, pumping, solids and meals
• Sleep as a start and an end time, with a running timer when it is happening now
• Nappies, including contents and colour
• Temperature, medicine and jaundice readings
• Weight, height and head circumference
• Teeth, milestones and moments of your own
• Photos and notes on any record
• What you spend, on its own or attached to a record you are already making

GROWTH ON THE OFFICIAL CURVES

Weight, height and head circumference are plotted against the WHO Child Growth Standards, by sex, from birth to five years. The percentile comes from the official LMS tables, not from an approximation, and weight and height share one chart so a single check-up reads as a single moment.

A VACCINE SCHEDULE THAT KNOWS YOU JUST ARRIVED

The immunisation list is built from your baby's date of birth. Doses recommended before the day you installed the app are marked "not recorded" rather than overdue, because the app was not there to see them. Record a dose in a couple of taps, add the site and batch number if you want them, and export the list as CSV or PDF when someone asks for it.

WHEN THEY ARE UNWELL

Log a temperature and Cubdays gathers the readings into one illness on a real time axis, with each medicine on its own track, so you can see what happened after each dose. Choose a re-dose interval yourself and it counts down. Cubdays does the arithmetic. It never tells you what to give.

REMINDERS THAT FIT REAL LIFE

Daily, weekly, every few hours, alternating between two things, or timed from your last record. Snooze them, mark them done, and have the record written for you.

YOUR DATA STAYS ON YOUR PHONE

Every record lives in a database on your device. We do not upload it and we cannot see it. An account is optional and holds nothing but your email address. Export everything to CSV whenever you like, and delete a profile to clear it.

MORE THAN ONE CHILD

Each baby has their own profile, photo, colour and records. Switch between them from the top of the timeline.

SMALL THINGS

Follows your phone's night mode and your system text size. Choose your units one at a time, so you can keep millilitres for bottles and still read pounds on the scale.

Cubdays is a record-keeping tool for parents and carers. It does not provide medical advice.