Why TandemBaby
I started building this while Madara was pregnant with our first.
We wanted a baby tracker that wasn't ugly, that wasn't trying to upsell us at 3am, that wasn't going to sell our baby's data to a formula company. I'm a lawyer by day, and I looked at what was out there and thought: I can probably do better than this.
I couldn't, at first. The first six months were a lot of bad drafts. Tables of numbers. Charts that made you feel like you were failing. Notifications that shouted. I deleted most of it.
What's left is what we wished we'd had. The Orbit - one glance, your baby's whole day. Whisper Mode, because a bright screen at 3am is violence. Notifications that pick the right moment instead of the clock. Milestones with photos because the good stuff is worth remembering. And growth charts against WHO standards because every parent, at some point, wonders if everything is okay.
TandemBaby is built by two people in Riga. Me - Janis - and Madara, who's on the board, named the app, and has shaped it from day one. We built it together while we became parents together. That's the whole point.
What changed once he arrived
When I first wrote this page, our son hadn't been born yet and the app was still in TestFlight. I said I didn't know anything — I didn't know what his sleep would be like, whether he'd feed well, what we'd get right and what we'd have to rebuild.
Now I know a bit more. Some of it we got right: two taps really is the whole interaction at 3am, and Whisper Mode turned out to matter more than any chart. Some of it we rebuilt. Partner sync wasn't in the first version at all, and it's now the thing people write to us about most — because the real problem was never logging the feed, it was the two of us trying to remember, at four in the morning, which one of us had already done it.
TandemBaby is on the App Store now, averaging five stars. We answer every review ourselves — if you've had a reply from us, it was one of the two of us typing it, usually one-handed.
If it helps you at 3am, that's the whole point.
— Janis, updated 29 August 2026