LittleCoo
One-Hand Log, Care for You
A baby tracker for the hours nobody warns you about.
Why we called it LittleCoo
Before a baby can say anything, they coo.
It arrives somewhere in the first couple of months — a small, round, open-mouthed ooh that isn't crying and isn't asking for anything. It's the first sound your baby makes simply because you're there. You can be exhausted past the point of forming sentences, and it will still stop you where you stand.
That's the whole name. Coo, for the moment you realize someone is in there, saying hello. Little, for who's saying it.
Look closely at the icon at the top of this page. That's a baby mid-coo — eyes closed, cheeks warm, mouth a small round o. We tried a lot of logos. Doves, leaves, gentle abstract shapes. None of them were the sound. This one is.
We wanted the app to feel like that sound: small, warm, and asking nothing of you.
Built by a parent, for parents
LittleCoo wasn't built in a strategy meeting. It was built at 3am, by someone holding a phone in one hand and a baby in the other, who could not remember when the last feed was, or which side, or whether that nap counted.
Every baby tracker we tried wanted two hands, a steady surface, and a clear head. At 3am you have none of those. So the first thing we designed wasn't a feature — it was the reach. Every control sits in the thumb zone, in the bottom half of the screen, so you can log a feed without putting anyone down.
The second thing we noticed is that the apps were all about the baby, and none of them ever asked how you were doing. That felt like a strange thing to leave out. So we didn't.
— Lu, founder and parent, Curiosity Bit
What parents are saying
"I can literally do everything with one thumb, which I certainly appreciate at 2am."
"It feels less like a sterile data tracker and more like a digital baby book."
"Incredibly intuitive and has made communication with my partner so much easier."
What LittleCoo does
One thumb, one tap
Feeds, diapers, sleep, pumping and activities — logged from the bottom of the screen. Swipe the wheel to change what you're tracking. No reaching, no two-handed forms.
Everyone stays in sync
The Handoff Dash shows the next caregiver what just happened — last feed, which side, nap length, diaper count — in real time. No 2am group texts.
It checks on you too
Log your mood. If you log "Rough" or "Zombie," your partner gets a gentle nudge, so help arrives without you having to ask for it. Claim your small wins. Breathe for five minutes.
Doctor-ready in one tap
Mid-appointment and asked how much your baby's been eating? Doctor Mode puts daily averages for feeds, sleep and diapers on one screen. Hand the doctor your phone.
Watch them grow
Growth charts, medical records, patterns over days and weeks, and Moments — photos with milestone markers drawn from what you already logged.
Designed for the dark
Dark mode comes standard, because half of parenting happens with the lights off and one eye open.
What it costs
The parts you need most are free, and you don't have to make an account to start. Open the app and you're already tracking.
| Free |
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|---|---|
| LittleCoo+ |
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Your data is yours. Export is free and always available in the app, and you can delete your account and everything in it from Settings, at any time, without emailing anyone.
A note on what LittleCoo is
LittleCoo is a logging tool, not a medical device, and it isn't a backup service — please keep your own copies of anything that matters to you, which is what the Export button is for. We'll be candid about that rather than promise you more than software can honestly promise.
Read the details in our Terms of Use and Privacy Policy.
Say hello
We read every message — feature requests, bug reports, or just telling us how it's going.
Email: contact@curiositybitllc.com
Curiosity Bit LLC
2310 Homestead Road, Suite C1-437
Los Altos, CA 94024
However tired you are today — you're doing better than you think.