Rhythm vs Nara Baby
Rhythm is a browser tracker that computes wake windows from your baby's own days. Nara Baby is a polished native app where you set the wake windows and one payment covers every caregiver.
Last updated: September 2026
Nara Baby is a well-made native app with no ads. One payment, $9.99/month or $99.99 for lifetime, covers every caregiver and child. Rhythm's household sync is $5/month or $45/year. The bigger difference is how each handles sleep guidance and where your data lives.
| Rhythm | Nara Baby | |
|---|---|---|
| Price | RhythmFree on one device, including predictions. Sync, partner invites, and backup are $5/mo or $45/year per household | Nara Baby7-day free trial, then $9.99/month or $99.99 once for lifetime. One payment covers all caregivers and all children. Without a subscription the family is read-only |
| Account to start | RhythmNo - open the page and log the first event; an account is only for sync | Nara BabyYes - Nara's setup guide says you create an account on first launch |
| Sleep and wake guidance | RhythmComputes the wake window from your baby's own logged days, on your phone, and labels whether each number came from an age default, logged sleep, or your override | Nara BabyYou choose the wake windows (Nara publishes an age chart) and nap reminders shift based on when the last nap ended |
| Events you make yourself | RhythmBuild your own event types, instant or timed, with the detail fields you pick | Nara BabyA set activity list you can trim, but not add to - there's no builder for new event types |
| Breast milk stash | RhythmFreezer inventory with oldest-first order and expiry dates from CDC storage guidance | Nara BabyPumping sessions, yes; no freezer storage or milk tracking |
| Where your data lives | RhythmOn your device first; a copy reaches my servers only if you turn on sync, and sync fees are the whole business | Nara BabyBehind your Nara account, synced through Nara's service; their privacy policy shares contact and device data with advertising partners, tracker health data excluded |
| Export your data | RhythmCSV or JSON from Settings, whenever you want it. Rhythm also imports Nara's CSV | Nara BabyCSV per child from Account, Family, your child's name. Still available when a subscription ends |
Nara's pricing, trial, read-only behavior, and export steps checked against Nara's own FAQ and the Nara Baby App Store listing on September 30, 2026. The App Store also lists lower subscription and lifetime prices ($6.99/month, $69.99 lifetime); which users they apply to, and when free use ends for existing users, is not stated there. Wake-window and setup rows come from Nara's tracker FAQ and family setup guide, and the advertising-partner clause in the data row from Nara's privacy policy and consumer health privacy policy, all checked August 17, 2026.
Where Nara is the better choice
Choose Nara if you want a native app and like the idea of paying once: the $99.99 lifetime option covers every caregiver and any future children. Native platform features matter too: an Apple Watch app, home-screen widgets, Live Activities on the Lock Screen. Nara also covers pregnancy and postpartum tracking for the mother, which Rhythm does not attempt.
Where Rhythm is different
The app does the wake-window math.
Nara's nap reminders run on windows you pick from an age chart, so you update them as your baby changes. Rhythm computes the window from your baby's own logged days, with a separate number before each nap and before bedtime, and labels whether it came from an age default, logged sleep, or a setting you chose. The wake-window tracker page explains how the estimate works.
No account until you want one.
Rhythm opens in the browser and logs the first feed with no sign-up: enter your baby's name and birthday and you're in. The record stays on your device unless you turn on sync. Nara's setup starts with an account, and your data lives behind it.
Questions
Is Nara Baby still free?
Not for new entries. Nara's FAQ lists $9.99/month or $99.99 lifetime after a 7-day trial, and without a subscription the family can view and export existing data but not add new entries (checked September 30, 2026). Rhythm is free on one device, and household sync is $5/month or $45/year.
Does Nara predict naps the way Rhythm does?
They work differently. In Nara you choose the wake windows (it publishes an age chart) and reminders shift based on when the last nap ended. Rhythm computes the window itself from your baby's own logged days and labels where each number came from.
Can I import my Nara data into Rhythm?
Yes. Export each child's CSV from Nara (Account, Family, your child's name, Export Data), then use Settings, Import Data, Nara in Rhythm. You see the counts before anything is saved. The import guide has the steps.