Private iOS baby tracker
Every feed, nap, and diaper. Your baby’s data never touches the internet.
Hazelnut is a fast, one-handed baby tracker built for bleary 3am logging — with no accounts, no cloud, and no server of ours anywhere in the picture.
Built for 3am
One hand on the baby, one thumb on the phone.
Big tap targets, minimal taps, and timers that keep counting no matter what. Hazelnut is designed for the moments when you’re too tired to fight an app. Cards marked Full come with the one-time Hazelnut Full purchase; everything else is free.
Side-switching breast timer
Times each side, remembers which one is next, and pauses mid-feed without losing count.
Bottle and pump logging
Time a bottle live or log a finished one, in whatever units you already think in. The amounts you actually pour are one tap away, and a top-up right after a nurse counts as one feed, not two.
A pumping guide, not a pumping boss
An optional starting point for how many milk removals a day might suit you, drawn from your own sessions — with a gentle reminder if you want one. Calibrate against your pump and Hazelnut can estimate what a nursing session delivered, too. Nothing is enforced.
Log it when it happened
Babies don't wait for apps to open. Slide start times back, adjust end times, and log any event after the fact.
One-tap diapers
Wet, dirty, or both — logged before you've finished wrapping it up.
Timers that survive anything
A running timer is stored on disk, not in memory. Force-quit the app or reboot the phone and it's still counting.
Glanceable from the Lock Screen
Running feeds and naps show up as Live Activities on the Lock Screen and in the Dynamic Island — no unlocking, no app-opening.
A history you can fix
A day-grouped timeline of everything, editable after the fact. Filter to feeds, sleep, or diapers, collapse the days you're done with, and keep photos and daily stats where you want them.
The shape of your days
Patterns offers 39 cards — a whole day as one ribbon, feeds by the hour, sleep rhythm, how one thing follows another. Pick the ones you want, put them in order, and give each its own timeframe.
Backups that happen on their own
Turn on daily or weekly and Hazelnut writes a compressed snapshot — photos included — into the Files app, keeping the last few and pruning the rest. Or take one yourself in a single tap.
A journal for the big stuff
First smile, first tooth, first fever. Milestones, records, a health log, and medication doses with next-dose reminders — for the baby, and for you.
A day planner with teeth
Lay the day out and drag feeds, naps, pumps, and medicines where they belong. Each block can ring as a real alarm — the kind that wakes you — and after a few days Hazelnut suggests a routine from what already happens.
Solids, and what they're allergic to
Log a meal and how much went in. Every new food is recorded, and a doctor's allergy verdict reaches every paired phone — however little else you share with it.
Why it exists
Your baby’s data is nobody’s business.
Every feed, nap, diaper, and photo is stored in a plain database on your phone — inspectable, exportable, and yours. There’s no server to breach, no sync service to trust, and no privacy policy loophole to read twice. The app can’t phone home, because there is no home to phone.
Uploads of your data
0
sync is radio-to-radio, phone to phone
Accounts to create
0
no email, no password, no sign-in
Third-party SDKs
0
no analytics, no ads, no crash uploads
And this website doesn’t track you either — no cookies, no analytics, no external requests.
Sync to your partner’s phone. Not to a server.
Pair two phones once and Hazelnut syncs peer-to-peer — they talk directly to each other over Bluetooth and Wi-Fi Aware whenever they’re near, no cloud account, no middleman. Both parents see the same feeds, naps, and medicines. And if Hazelnut’s developer disappeared tomorrow, sync would keep working, because there’s nothing to shut down.
It runs while the phone is in your pocket
Paired phones keep a low-power Bluetooth channel open in the background, so a 3am feed logged downstairs is already on the other phone by the time anyone looks. A big catch-up hands itself over to Wi-Fi Aware for the speed, then drops back down. Neither of you opens a sync screen.
Only what changed crosses
The two phones compare fingerprints of what they hold and exchange the difference — not the whole history, every time. Edits and deletions travel too, so fixing a mistyped bottle on one phone fixes it on both.
One household, and a say in who sees what
Two parents become one household — each agrees on their own phone, so nobody is pulled in. A grandparent or a sitter can see just the last two days, or just feeds and diapers, and a sitter who helps two families never carries one family’s records to the other.
One honest caveat: two phones both asleep in two pockets won’t find each other. One of you has to have the phone awake — which, with a newborn in the house, one of you always does. And a phone without Hazelnut Full can be synced to but can’t start a sync, so everything logged on a sitter’s free phone still reaches you when yours comes by.
A quick look
Around the app.
Questions
Fair questions, short answers.
When can I get it?
Hazelnut is in active development and coming to the App Store. This page will carry the download link the day it's out.
Where does my baby's data live?
In a single database file on your phone — never on a server. You can export the whole thing from Settings whenever you like.
Can both parents use it?
Yes. Pair two phones once from Settings and they sync directly to each other whenever they're near — both of you see the same feeds, naps, and medicines. Then make it one household: both of you agree on your own phone, and from then on every child belongs to the family rather than to whichever phone added them. No account required on either phone.
Do I have to open the app for sync to happen?
Usually not. Paired phones stay reachable over a low-power Bluetooth channel even while pocketed, so entries move across on their own; when there's a lot to catch up on, the phones switch to Wi-Fi Aware for the transfer. The one thing that won't work is both phones asleep at once — one of them has to be awake for the two to find each other. Starting a sync takes Hazelnut Full on at least one of the two phones; a free phone can always be synced to.
Can a sitter or grandparent use it without seeing everything?
Yes. Each paired phone gets its own share settings: give a partner everything, and give a caregiver just the last couple of days, or only feeds and diapers, or everything except the photos. The setting is per phone, and their row shows exactly what's being shared. One thing to know: a limited window applies in both directions — though you can ask to always get their own entries back, however late they sync. And a sitter who helps two families never passes one family's records to the other.
What if I lose my phone?
Turn on automatic backups (Settings → Backup) and Hazelnut writes a compressed snapshot of everything — photos included — every day or every week, keeping the most recent few in your Files app under On My iPhone → Hazelnut. You can also take one yourself in a single tap and send it wherever you like. Importing on a new phone restores everything in one step. And if you've paired with a partner's phone, their copy is a live backup too. Backups live on the device, so copy one somewhere safe — deleting the app deletes them with it.
Does it ever connect to the internet?
Your logs never do. Hazelnut has no servers and no accounts, and partner sync uses Bluetooth and Wi-Fi Aware to talk straight to your other phone — short-range radio between two devices you own. The only time the app goes online is if you buy or restore Hazelnut Full: that's Apple's App Store, and we never see your payment details or your data. Once unlocked, it works fully offline.
How much does it cost?
Logging is free, and always will be: up to two children, feeds, sleep, diapers, photos, the full history with its filters, and a feed schedule with the alarm that wakes you for a night feed. Hazelnut Full is a single $44.99 purchase — not a subscription — that adds Patterns, the journal, backups, the pumping guide, shifts, custom reminders, and as many children as you like. Family Sharing means one purchase covers both parents. Nothing you've logged is ever hidden behind it.
Will there be an Android or web version?
iOS first — that's where Hazelnut lives today. An Android version is a long-term goal, but there's no date to promise yet. A web version, never: web apps need servers, and no servers is the whole point.