Start the nap on your phone. End it on theirs.

A baby tracker built for 3 a.m. — one giant button, one hand, in the dark — and for two exhausted people who need to agree about what just happened.

Lulla logs feeds, sleeps and diapers. Both caregivers write to the same log, so a sleep started on one phone can be ended on the other. There is no conflict dialog, because there is nothing to conflict over.

Coming to the App Store

What it does

Three giant buttons

Feed, sleep, diaper — bottom-anchored, thumb-sized, reachable without looking. One tap starts a timer, one tap ends it.

Partner sync, free

Invite the other caregiver with a link. No account for either of you; the log lives in your own iCloud.

Night mode

After dark the whole app goes warm and dim, with a stop button you can hit without your glasses. Nothing in it flashes white.

Lock screen and Dynamic Island

The running timer where you can already see it, with a button that ends the sleep without unlocking.

Undo on everything

Six seconds to take anything back, and a bin that keeps deleted entries for thirty days.

Twins

A prominent child switcher, a colour and initial on every entry, and a one-tap fix when something lands on the wrong baby.

Why nothing gets lost

Most trackers store the running session as a record that two phones then fight over — which is why the most-quoted one-star reviews in this category describe a partner starting a sleep, the other phone refusing, and the night's data going with it.

Lulla does not store sessions at all. Each phone appends immutable entries to a shared log, and the sessions you see are worked out from that log. Two caregivers both tapping Sleep produce one nap, beginning at the earlier of the two taps. A stop from either phone ends it. Corrections merge field by field, so two people fixing two different things both keep their fix. Deleting writes a tombstone that any phone can undo.

It works with the network off, with no iCloud account, and on a plane. When the signal comes back, the log reconciles, and the app tells you plainly how many entries are still waiting rather than hiding it behind a spinner.

What it will not do

Lulla reports what you logged. It does not interpret it. There is no sleep coaching, no prediction, no "is this normal", and nothing anywhere in it is medical advice.

It also sends no notification you did not ask for. In particular, if you stop logging, the app goes quiet and stays quiet. A cheerful "how's the baby?" push is the cruellest thing an app in this category can send, because it cannot know why the logging stopped.

What it costs

The logging is free forever. So is partner sync, the Live Activity, the basic widget, CSV export of everything, and a fortnight of charts. There is no paywall anywhere in the logging path.

Lulla Complete adds the parts you show to someone else: a printable report for the paediatrician over the period you choose, and charts over your whole history rather than the last fortnight. It is $34.99 once — no subscription, no renewal — or $19.99 a year if you would rather. Babies grow up; a lifetime price is the honest one for a phase that ends.

Privacy

No account, no ads, no analytics, no third-party SDKs. Your entries live on your phone and, if you are signed in, in your own iCloud — nowhere else. There is no Lulla server for them to go to. Deleting everything is one action in Settings, immediate, with nothing kept and no questions asked.

The full privacy policy says all of that at length, and the support page is where to write if something is wrong.