Cubby Baby Tracker
Feeds, naps, diapers, one dial
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Cubby is the baby tracker for the 3am version of you.
Every other tracker is bright, pastel and built for daylight. Cubby is dark by default, because the job happens in a blacked-out nursery with one hand free.
ONE DIAL FOR THE WHOLE DAY
Cubby draws your baby's day as a 24-hour clock. Sleep shows as arcs, feeds as spokes, changes as pips on the rim. One look tells you what kind of night that was — something no list of rows has ever managed.
IT LEARNS WHEN THE NAP IS COMING
Cubby measures your baby's actual wake windows and tells you when the next nap is likely, with an honest window rather than false precision. Until there's enough history it falls back to age guidance and says so. Most trackers put nap prediction behind a monthly plan; Cubby has no subscription at all.
IT ALSO LEARNS THE FEEDS
Next feed predicted from the median gap between recent feeds.
FAST WHEN YOU'RE WRECKED
• One tap starts and stops the sleep timer
• Two taps log a bottle, a nursing session or a diaper
• Big targets, tabular numerals, no hunting
TRACK EVERYTHING THAT MATTERS
Bottles, nursing timers per side, solids, sleep, diapers, pumping, weight, length, head circumference, temperature and medicines.
MILESTONES AND SHOTS
CDC milestone checklists by age and the routine childhood immunisation schedule, ticked off as you go. Most trackers skip both entirely.
REAL WHO GROWTH CENTILES
Weight, length and head plotted against the actual WHO Child Growth Standards — 3rd to 97th centile bands with the median through the middle, and your baby's centile named beside each reading. Built from WHO's own published tables, not an approximation.
TWINS WELCOME
Each baby gets their own log; switch with a tap.
REMINDERS, ON DEVICE
Optional nudges when a feed is likely due or the nap window opens. Scheduled on your iPhone — no push server involved.
NOTHING TO SIGN UP FOR
No account. No sign-up. No email. No ads. No subscription. Every feed, sleep and diaper you log stays on your iPhone — export the whole log whenever your pediatrician asks.
No tracking of you across other companies' apps or websites, and nothing shared with data brokers.
Cubby describes what you logged and estimates from your own data. It is not medical advice. Growth centiles come from the WHO Child Growth Standards and are there for context, not diagnosis — always talk to your pediatrician about anything that worries you.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Growth and temperature entries can be corrected from the edit sheet — a weight typed as 150 instead of 15.0 no longer has to be deleted.
History pages back past 60 days, and no longer says nothing was logged when it was.
Sleep across midnight now counts on both days, on the dial and in the daily total.
The exported log keeps commas and line breaks in your notes exactly as you typed them.
Every control is now named for VoiceOver, with selected and checked state announced.
The developer, Meng-Yi Hsu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Meng-Yi Hsu
- Size
- 56.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock All Apps I Built $5.99
- Unlock Cubby $12.99
- Unlock Cubby $9.99
- Copyright
- © 2026 Mark Utility Labs