Every feature, and what each one is for

Bottle, breast, pump, nappy, sleep, food, tummy time and notes are there the moment you install. Nothing to configure before the first feed.

Breast pump is its own type rather than a bottle feed, so expressed output is totalled separately from what your baby drank. Custom types are a Premium addition for the routines the eight do not cover.

A basement nursery, a flight, a hospital corridor. The entry saves the instant you tap it, and the day is never reconstructed from memory afterwards.

Every write lands on the device first and joins a queue. The queue drains when a connection returns, on app foreground, on pull-to-refresh, and when a push arrives.

A 3 am nappy is one tap. Start Sleep, Wet, Dirty, a bottle at your usual size, breast left or right, all from one sheet.

Long-press the plus button, or use the Quick Log button above it. Bottle sizes default to 60, 90 and 120 ml and you can change them. Android home-screen shortcuts and web app shortcuts log the same actions without opening the app first.

She woke at 2 am and you resettled her. One tap puts it on the record without waking you up properly, and in the morning the night has a shape instead of a feeling.

Between 7 pm and 7 am the capture surface goes near-black with a warm dim foreground: no white flash, no sound, no startling buzz. A waking is an event inside the night rather than the end of a sleep, so three wakings leave one sleep record with three wakings on it. Marking back-to-sleep is optional, and so is saying how you settled her. If you slept through the logging, the morning prompt lets you add the night afterwards.

• –A waking with only a time is a complete record. Everything else is optional
• –The 3 am bottle and nappy can be logged from the same dark screen
• –A mis-tap can be undone without opening an edit form

"Hey Siri, log bottle" while both your hands are busy. The entry is in before you have put the baby down.

BubSync answers a deep link, so you build the phrase yourself in the iOS Shortcuts app or as a Google App Action and say whatever you like. Sleep, a one-hour sleep, wet and dirty nappies, bottle, and breast left or right are all supported.

Send tonight’s babysitter a link. They open it in whatever browser is on their phone and read the whole handover. No account, no app, no charge, on either side.

The link freezes the handover at the moment you send it: the last feed, the last sleep, the last nappy, your care essentials, and your instruction manual. Its address is unguessable, and it stops working after 24 hours.

• –Free on every plan, for the sender and the reader
• –Expires after 24 hours, checked on the server rather than left to a cleanup job
• –The reader needs no BubSync account and installs nothing

Write down how your baby is settled once, and stop writing it out again for every sitter, grandparent and daycare handover.

Two pieces of care content on the baby: comforts and likes, sensitivities and dislikes, then a longer manual for how you do things. Both ride along in the 24-hour link and both are visible to carers in the family. Neither has a paywall on it.

Your partner logs a feed and it is on your phone. Nobody sends an update text, and the timeline shows who did what.

Each carer signs in as themselves rather than sharing one login, so entries carry an author. One subscription covers everyone who helps, with no per-seat charge and no cap on carers or babies.

A nanny sees the toddler she looks after. Grandma sees the memories and not the medical notes. Nobody has to be trusted with everything to be useful with something.

An invite asks who the person is: Parent, Family, Carer, or a custom mix of activities, growth and memories. Groups combine, so a babysitting grandparent gets both. You can change what a whole group sees afterwards and it applies to what you already shared, and any single entry can carry its own answer to "who can see this".

• –Baby scope and data scope are separate: which children, and which kinds of record
• –Changing a group default applies retrospectively, except where an entry has its own setting
• –A carer who loses access is told what they can no longer see

Accept a co-parent invite without giving up the family you already run. Switch between them, and each one stays its own world.

Every family you parent is a profile you can switch to. The profile you are not in contributes nothing on that device: no babies, no feed, no memories, no notifications. Either parent can add babies, rename the family and manage who is invited.

You logged the 3 am feed. Before you go back to sleep you can see it reached your partner’s phone, and whether they have looked.

Sent, delivered and seen, for every device in the family, the way a messaging app does it. Changes land in seconds rather than waiting for someone to pull to refresh.

The person starting their shift is told what is due next, without you remembering to send the reminder.

Live carers in the family get prompts as the day moves. The handover keeps updating instead of freezing at the moment you sent it, which is the difference between a link and a carer invite.

First smile, first step, first word, in the order they happened. BubSync suggests which firsts to watch for around your baby’s age, so the quiet ones still get written down.

Milestones are memories rather than tracked activities, so they live in their own tab and never clutter the timeline or the insights. Recording the built-in ones is free. Adding milestones of your own is Premium.

Attach photos to any memory and turn two to four of them into a themed collage with one tap. On Premium the photo reaches the family the moment you take it.

Photos are free and stay on your device. Premium syncs them to everyone you shared the memory with, so a grandparent at work sees the picture rather than hearing about it that evening.

On the free plan a photo never leaves the device you took it on. On Premium it reaches the people you already added to your family, the parents and your Family group, and stops there. Never a feed, never a public link, never someone you did not invite.

Every image is re-encoded on the device before it is stored, which strips GPS and camera metadata. A memory carries one audience for all of its photos, and the default is the parents plus your Family group. Carers do not get the baby book unless you say so. Cloud copies on Premium are encrypted, and access is checked against that audience every time a photo is opened.

• –Location and device metadata stripped on the device, before anything is stored
• –Shared with parents and family by default, and you set that default on the Memories tab
• –Any one memory can go narrower or wider: Parents only, Only me, or the people you name
• –A photo taken in the app is also saved to your camera roll, so BubSync is never the only copy
• –If Premium lapses, cloud copies are kept for at least 30 days and then purged

When you welcome a new baby, BubSync writes them a short poem of their own. Keep it in their memories and it stays there.

Written from the details you added about your baby. The first poem is free for every baby, on every plan.

See whether a hard night was a blip or a shift. Free covers a day and a week, which is enough to answer most questions.

Charts per activity type over 1 and 7 days on the free tier. Premium opens 30, 90 and custom ranges, which is the window a pattern across a growth spurt actually needs.

Pick what you need (a day schedule, a sleep rhythm, play ideas, milestones to look for, or an insights summary), choose which baby it is for, and read something about your baby rather than babies in general.

Each action sends only pre-aggregated patterns from your own logs, never raw history. The response streams in, opens in the same live editor as the instruction manual, and can be saved to the family feed or pinned above the timeline where the next carer will see it.

• –Predefined actions rather than a chat box, so each one asks only for the data it needs
• –Every response is editable before you keep it; nothing lands in the feed without you
• –General guidance from your own data, never medical advice

A plan for the day ahead: when the naps are likely to work and where the night sleep sits, instead of a schedule from a blog post about somebody else’s baby.

The Day schedule and Sleep rhythm actions in the AI hub are grounded in your baby’s own aggregated sleep pattern and age. The schedule reads as one timed list you can scan mid-morning, and siblings are interwoven into a single plan rather than one schedule each. With too little sleep history it says so plainly and gives age-banded guidance framed as general, never as your baby’s own pattern.

• –Preterm babies get schedules built on corrected age
• –Editable before you keep it, and pinnable above the shared timeline
• –General guidance from your own data, never medical advice

One glance at the baby card suggests what may be worth trying next, whether that is a feed, a nap, a nappy change or play, without a wall of generated text.

Computed on your own device from the time since each activity against published age guidance, with no model, no network call and no cost, so it renders instantly and works offline. Tapping it shows the reasoning in plain words, phrased as "may be worth trying", never as an assessment of what your baby needs.

Weight, height and head circumference plotted with the percentile you get asked for, ready to show at the check-up rather than reconstructed in the waiting room.

Plotted against the WHO standards for your baby’s sex, and exportable as a PDF that reproduces the chart rather than a table of numbers.

A baby born early is compared to where they would be if they had arrived on their due date, so the chart stops saying they are behind when they are not.

Tick one box and add the due date. Before the due date, measurements are scored against the INTERGROWTH-21st preterm standards; after it, against WHO by corrected age, and the chart runs continuously across the crossover. Correction applies until 24 months and then stops on its own. Milestone suggestions and the AI hub’s schedules use corrected age too.

• –The free baby age and growth percentile tools do corrected age with no account at all
• –Each measurement shows both ages, for example 2m 18d corrected and 4m 24d actual

Take your records with you. A PDF for the appointment, a CSV for a spreadsheet, JSON if you want the lot.

From the share button on the Insights and Growth screens, for the baby and the period you are looking at. The PDF reproduces the charts as the app draws them.

Nobody erases your family by handing your unlocked phone to a toddler, and when you do mean it, it happens.

Deletion needs a one-time code emailed to your verified address on top of the confirmation. Active account data is removed within 30 days. Encrypted disaster-recovery backups roll off within 35 and are not readable by anyone.

Logging a 3 am feed without a white screen in a dark room, or in anybody’s eyes.

Light, Dark or System in Settings. It follows the phone if you let it.

One fewer password to invent at the point where you least want to invent one.

Available in the web app and on Android. iPhone users sign in with an email address and password.

A code from a card, an event or a friend gets you a better start on Premium than the standard trial.

Open the Premium screen in the app and use "Have a promo code?", which hands you to the App Store or Google Play redemption sheet. A campaign link opens the app straight onto its offer, and the terms are stated on the button before you buy anything.

• –Redemption happens in your app store, so codes work on Android and iPhone rather than in a browser
• –Every code carries an expiry set at the store

Install it on Android or iPhone, or open the web app on a laptop. A grandparent can help without installing anything.

One codebase, so the web app is the whole product rather than a cut-down viewer. The same app is published on Google Play and the App Store, and your account and data are the same on all three.