Parenting in rhythm.
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. Built for 3am.
Three steps. Zero overwhelm.
From tap to insight in seconds.
Log in 2 taps
Feed, sleep, diaper, medicine. Quick-log buttons at the bottom of every screen. Done before the baby notices.
See the pattern
The Orbit is a 24-hour radial clock. Your baby's whole day, visible at once.
Understand your baby
Smart stats and notifications learn your baby's rhythm. You'll know what's coming before the crying starts.
Everything your baby's day needs.
Built for the parent who's up at 3am.
The Orbit
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.
Smart Notifications
Learns your baby's rhythm. Reminds you at exactly the right time. Pick your vibe: classic, warm, comedy, or drama.
72 Milestones
72 evidence-based milestones, 0-24 months. Capture photos as they happen. A year from now, you'll be glad you saved them.
Growth Charts
Track weight, length, and head circumference against WHO standards. Your pediatrician will thank you.
Stats & Insights
Weekly trends and daily summaries. Exportable as PDF or CSV. The big picture of your baby's routine, when you want to see it.
Whisper Mode
Automatic dark theme from 10pm to 6am. Low blue light. Because your eyes deserve mercy at 3am.
Log what's happening. Keep what matters.
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.
See it in action
Real screens. Real data. No smoke and mirrors.
Stats & Insights
Weekly trends at a glance.
Sleep, feeds, output - all in one place.
Growth Charts
WHO standards. Percentile tracking.
Share with your pediatrician.
72 Milestones
Never miss a first.
Evidence-based. Category badges.
On your wrist, too.
Log a feed without reaching for your phone. Start a sleep timer while rocking. One tap on your wrist - done.
Included free with TandemBaby.
Simple, honest pricing.
Start free. Upgrade when the patterns start to matter.
Free
For remembering what happened.
- Unlimited feeds, sleep, diapers, meds
- The Orbit, 24-hour view
- Today's stats, at a glance
- Apple Watch app
- Classic notifications
- One baby (twins free)
Pro
For understanding what it means.
or $49.99/year (save 40%)
About $0.23 a day. Less than a diaper.
- Everything in Free, plus:
- See patterns across weeks, not just days
- Know she's on track (WHO growth charts)
- Notifications with a vibe (warm, comedy, drama)
- 72 milestones, with photos
- A PDF your pediatrician will thank you for
- CSV export, because it's your data
- Multiple babies (for the serious parents)
Cancel in two taps. No dark patterns, ever.
No ads. No data selling. Built independently in Riga.
From the blog
View all posts →Questions & answers
Is my baby's data private?
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.
What ages does TandemBaby support?
TandemBaby works from birth through toddlerhood. The 72 milestones cover 0-24 months, and logging works for any age.
Does it work offline?
Completely. TandemBaby stores everything on your device. No internet connection needed to log, view stats, or see the Orbit.
Can I export my data?
Pro subscribers can export all data as CSV or generate a PDF baby report - perfect for sharing with your pediatrician.
What's included free vs. Pro?
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.
Can my partner use it too?
Partner sharing is on our roadmap. For now, TandemBaby is single-device. We're building sync that we're genuinely proud of - stay tuned.
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