A baby tracker built for two parents
One baby, one timeline, every caregiver's phone. Milli syncs feeds, naps and diapers between parents in real time - free, with no per-seat pricing.
Free for the whole family · iPhone & Android
The question shared-parenting actually runs on is "when did she last eat?" - asked at 2AM, from another room, or from the office. A baby tracker only answers it if both parents see the same log. Milli was designed around exactly that: every caregiver logs from their own phone, and everyone sees one shared timeline that updates in real time.
How sharing works
- One parent creates a family in Milli and gets a short invite code.
- The other parent installs Milli and enters the code - that's the whole setup.
- Both phones now show the same timeline. A feed logged on one phone appears on the other in real time, marked with who logged it.
There is nothing to configure beyond that: no shared password, no exporting and importing, no premium "caregiver seat" to buy. Family sharing is part of the free app.
Built for real handoffs
- Night shifts. You take the 1AM feed, your partner takes 4AM. Each of you can check when the last feed ended without waking the other to ask.
- Back at work. The parent at the office opens Milli and sees the morning unfold - feeds, naps, diapers - as it happens.
- Grandparents babysitting. They join with the same invite code, log from their own phone, and you watch the afternoon from wherever you are.
- A nanny's day. Everything logged during the day is already on your phone at pickup - no paper notes, no end-of-day summary text.
Why Milli instead of a shared notes app
Plenty of couples start with a shared note or spreadsheet. It works until the third night. A tracker built for this is faster to log one-handed, computes the "time since last feed" for you, shows patterns across days, charts growth against WHO percentiles, and can produce a PDF report for the pediatrician. And unlike most trackers, Milli doesn't charge for the second caregiver - see our comparison of the best baby tracker apps for how competitors price sharing.
It also keeps working when one phone has no signal: Milli is an offline-first baby tracker, so entries save instantly on the device and sync to the family timeline when a connection returns.
Frequently asked questions
Is Milli free for both parents?
Yes. Milli is free for every family member - there is no per-seat pricing and no premium tier. Family sharing is included, supported by ads.
How does my partner join?
One parent creates a family in Milli and shares a short invite code. The partner installs the app, enters the code, and both phones show the same timeline from then on.
Do both parents see the same data?
Yes. Every feed, nap, diaper and note syncs between devices in real time, and each entry shows who logged it.
Can grandparents or a nanny use it too?
Yes. A family is not limited to two people - anyone caring for your baby can join with the invite code and log from their own phone.
Get on the same page - literally
Download Milli free, create your family, and send your partner the invite code. Setup takes about a minute.