Averaging 5 stars on the App Store Built by two parents in Riga
Less guessing. More knowing.
Your baby has a rhythm. You just can't see it yet. TandemBaby makes it visible — and once you see it, everything gets calmer.
From tap to insight in seconds.
Feed, sleep, diaper, medicine. Quick-log buttons at the bottom of every screen. Done before the baby notices.
The Orbit is a 24-hour radial clock. Your baby's whole day, visible at once.
Smart stats and notifications learn your baby's rhythm. You'll know what's coming before the crying starts.
Built for the parent who's up at 3am.
Your baby's entire day on a 24-hour radial clock. One look tells you everything. We built it because tables of numbers don't help at 3am.
Learns your baby's rhythm. Reminds you at exactly the right time. Pick your vibe: classic, warm, comedy, or drama.
72 evidence-based milestones, 0-24 months. Capture photos as they happen. A year from now, you'll be glad you saved them.
Track weight, length, and head circumference against WHO standards. Your pediatrician will thank you.
Weekly trends and daily summaries. Exportable as PDF or CSV. The big picture of your baby's routine, when you want to see it.
Automatic dark theme from 10pm to 6am. Low blue light. Because your eyes deserve mercy at 3am.
Partner sync
The hardest part of a newborn isn't the logging. It's the handover — the three in the morning conversation where neither of you can remember who did what, and one of you is too tired to be kind about it.
TandemBaby puts both parents on the same log. You each have it on your own phone. Whoever gets up next already knows what happened while they were asleep.
Smart notifications
Most trackers nag on a timer. TandemBaby learns when your baby actually feeds and sleeps, then says something at the moment it's useful — and, if you want, says it with a straight face or with none at all.
Four voices to choose from: classic, warm, comedy and drama. Turn any of them off entirely. It's your night.
Three real ones, pulled straight from the app.
The data fades. The moments stay.
TandemBaby logs the data. But between the feeds and the diapers, you'll want to keep the other stuff. The first smile. The day he found his feet. The note you typed at 2am about how small his hands were. TandemBaby keeps those too.
Every milestone holds a photo. Every day has a Moments section for the little things - the notes, the pictures, the observations you'll want to read again in a year.
Not just a checkbox. Every milestone in TandemBaby keeps the photo, the date, and the note you took in the moment. A year from now, you'll have the whole thing - not just the fact that it happened.
Real screens. Real data. No smoke and mirrors.
Weekly trends at a glance.
Sleep, feeds, output - all in one place.
WHO standards. Percentile tracking.
Share with your pediatrician.
Never miss a first.
Evidence-based. Category badges.
Log a feed without reaching for your phone. Start a sleep timer while rocking. One tap on your wrist - done.
Included free with TandemBaby.
Averaging 5 stars on the App Store. We answer every review ourselves.
“At 3am you don't want to swipe through screens, you want one tap. Tap, baby's fed, back to bed. Whisper Mode goes dark automatically at night so it doesn't blast you. Partner Sync means my wife and I are never asking ‘did you feed him?’ — it's just there.”
vkksks · App Store review
★★★★★
“We've been using this app since coming home from the hospital with our son, and it's been a huge help. At the hospital we used paper notes, which quickly became messy and hard to follow. This app keeps everything organized and simple.”
★★★★★
“As newborn parents, this app has helped a lot. Having feeds synced between both parents means it's one thing less to wonder about. Simple and exactly what we needed.”
★★★★★
“It's very easy and practical to use. I like that I can share it with my husband and that it syncs with Apple Watch, so if there is no phone around I can still add the necessary process.”
★★★★★
“An app that is so easy to use, making sure I can follow my baby's sleeping, feeding and diaper schedules and all the changing trends daily. As a result I can support my baby and help establish routine.”
★★★★★
“A simple and user-friendly app that makes it easy to keep track of daily activities, as well as your baby's growth and development. I especially appreciate the reminders with a touch of humor.”
★★★★★
“Very convenient baby essentials tracker from feedings to sleep, diaper content and meds, growth charts. Allows precise feeding tracking and easy editing when adding data later. And fun too, with friendly, witty reminder notifications.”
The promise
Feeds, sleep, weight, photographs, the note you typed at two in the morning. In this category that kind of data has been sold to formula companies and ad networks before. Being suspicious about it is the correct instinct, and we'd rather you kept it.
So TandemBaby keeps the log on your device. Not because it's a feature we can charge for, but because we didn't want our own son's first year sitting on someone else's server either.
Logging, stats and the Orbit all work with no connection at all. Partner sync moves data only between the two of you.
There is no advertising business here and never will be. Our analytics are anonymous and hashed, through TelemetryDeck in Europe.
Export everything as CSV or a PDF report, and delete it all from inside the app. No email to write, no retention offer.
Start free. Upgrade when the patterns start to matter.
For remembering what happened.
For understanding what it means.
or $49.99/year (save 40%)
About $0.23 a day. Less than a diaper.
Cancel in two taps. No dark patterns, ever.
No ads. No data selling. Built independently in Riga.
Plain answers to the things every parent ends up searching for in the dark. Written by us, sourced properly, no ads.
Feeding
What the guidance actually says, why “on demand” is the real answer, and the hunger cues that come before crying.
Sleep
What sleep looks like from week one to week twelve, and why your baby has no body clock yet.
Sleep
Why a baby who slept suddenly doesn't, what permanently changed, and what actually helps.
Yes. All your baby's data stays on your device. We never see it, sell it, or share it. Our analytics use only anonymous, hashed identifiers through TelemetryDeck - a privacy-first European analytics provider. No ads, ever.
TandemBaby works from birth through toddlerhood. The 72 milestones cover 0-24 months, and logging works for any age.
Completely. TandemBaby stores everything on your device. No internet connection needed to log, view stats, or see the Orbit.
Pro subscribers can export all data as CSV or generate a PDF baby report - perfect for sharing with your pediatrician.
Free is the tracker. Pro is the understanding. Free gives you unlimited logging, the Orbit, and today's stats - enough to never lose track of a feed again. Pro adds the weekly and monthly view, growth charts against WHO standards, milestone photos, PDF reports for your pediatrician, comedy notifications, and profiles for twins or a second baby. Most parents start free and upgrade when they want to see patterns across weeks, not just days.
Yes — partner sync is live. You each have TandemBaby on your own phone and you both see the same log, so whoever gets up next already knows what happened. It's included free, not a Pro feature.
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