Press
In one sentence
Hodierna is a baby logbook for feeds, nappies, sleep and growth — built to be used with one hand, half asleep, at three in the morning, and to keep working when there is no signal.
In a paragraph
Dutch kraamzorg leaves a paper booklet behind after a birth, and for about a week it is the most useful object in the house. Then it fills up, or it is downstairs, or it is 3am and turning on the light would wake someone. Hodierna is that booklet on the phone already in your hand: one tap per entry, a breastfeeding timer that knows which side is next, a logbook both parents write into at once, and an alarm that goes off if nothing has been written down for as long as you chose. The whole logbook is free and works offline; nothing a parent needs at three in the morning is behind a paywall or a network.
Facts
- Name
- Hodierna. Listed on both stores as Hodierna: Baby Logbook.
- Maker
- Nurhak Altin, working alone, in the Netherlands. Not a company, not funded.
- Released
- Google Play, 31 August 2026. App Store, 16 September 2026.
- Platforms
- iPhone and iPad (iOS 16.4 and later), Apple Watch, Android phones, Wear OS. An iOS home-screen widget and a lock-screen Live Activity for a running feed or nap.
- Price
- The logbook is free, permanently — every entry kind, the full history, sharing, export and Night Watch, with no trial and no card. Premium (€29,99 a year, €5,99 a month, or €69,99 once) adds document storage and a one-page summary for a clinic visit, and covers a household rather than a person.
- Languages
- English, Dutch, Turkish, German, Spanish and French.
- Data
- Stored in the EU. Entries are written to the phone first and sync when they can, so the app is fully usable with no connection. Nothing a parent writes — names, measurements, notes, photographs — is ever sent as analytics.
- Links
- App Store · Google Play · hodierna.app · Privacy
What makes it different, honestly
There are a lot of baby trackers. Three things about this one are unusual enough to be worth a sentence, and each is checkable rather than a claim:
- It gives no medical advice, by construction. It will state a fact — "3.28 kg, 185 g less than last time" — and it will point at a professional. It will never interpret a value, and it never says a baby is fine, because it cannot know. This is not a disclaimer bolted on; a line triggered by a threshold counts as interpretation, and there is an automated test over all six languages that fails the build if one appears.
- The free tier is the product. Not a trial, not one baby, not a feature ladder. A parent at 3am with no signal and no subscription has the whole logbook.
- Two parents, one logbook, live. A feed started on one phone appears on the other immediately and stops on both when it stops. A midwife or maternity carer can be let in with a short code, and their access ends by itself.
One request. Please do not describe Hodierna as an app that tells parents whether their baby is feeding, sleeping or growing enough. It deliberately does not, and being described that way would undo the part of it that took the most care.
Images
All of these are the files uploaded to the stores, so they show the app as it actually ships. Free to use in any article about Hodierna, with no need to ask.
Download the whole kit (ZIP, 3.1 MB)
- App icon — 512 × 512 PNG
- Feature graphic — 1024 × 500 PNG
- Today — 1320 × 2868 PNG
- Vaccinations — 1320 × 2868 PNG
- The book — 1320 × 2868 PNG
- Growth — 1320 × 2868 PNG
- Patterns — 1320 × 2868 PNG
- Night Watch — 1320 × 2868 PNG
How to write the name
Hodierna — capital H, no italics, no accent. It is Latin, meaning "of today", and it is pronounced ho-dee-AIR-na. The app is not "the Hodierna app" and the maker is not "Hodierna Inc"; there is no company.
Contact
hallo@hodierna.app. One person reads it, usually within a day. Happy to answer anything not covered here, including questions about how the sync, the offline behaviour or the no-advice rule actually work — they are the interesting parts.