A Huckleberry alternative with free sleep predictions
Rhythm works out wake windows and bedtime from your baby's own logged sleep, on your phone, with no subscription for the predictions. Huckleberry is a native app that puts its SweetSpot predictions behind Plus at $11.99/month ($5.74/month billed yearly).
Last updated: September 2026
I built Rhythm after using other trackers with my own son. If you want a native iPhone app, a home-screen widget, an Apple Watch companion, or a paid custom sleep plan, Huckleberry does those and Rhythm does not. The clearest difference is which half you pay for: Huckleberry charges for predictions, and Rhythm charges for sync.
| Rhythm | Huckleberry | |
|---|---|---|
| Sleep / wake predictions | RhythmFree on one device, with no prediction subscription | HuckleberrySweetSpot, paid only |
| Put-down timing | RhythmLogs put-down duration and subtracts your family's own settle time from the predicted sleep time, so it can tell you when to start the put-down, not just when your baby should be asleep | HuckleberrySweetSpot gives a target sleep time only; their own guidance says to subtract routine and settle time yourself |
| What you can track | RhythmOver 20 built-in events across feeding, sleep, care, health, activities, and milestones, plus any you build yourself | HuckleberrySleep, feeds, pumping, diapers, growth, solids, potty, medicine, and activities including bath, tummy time, story time, and screen time |
| Events you make yourself | RhythmBuild your own, instant or timed, with the detail fields you pick, in the category you pick | HuckleberryNot in Huckleberry's App Store listing |
| Breast milk stash | RhythmFreezer inventory with oldest-first order and expiry dates from CDC storage guidance | HuckleberryNot in Huckleberry's App Store listing |
| Export your data | RhythmCSV or JSON from Settings, whenever you want it | HuckleberryCSV, emailed to you, one file per child |
| Works offline | RhythmYes - logging and predictions both run on-device | HuckleberryLogging works offline |
| What you pay for | RhythmSync, partner invites, and backup. $5/mo, or $45/year, per household. Predictions are free | HuckleberrySleep predictions. Syncing across caregivers is free; SweetSpot needs Plus at $11.99/mo, or $68.88/year billed annually |
Huckleberry pricing, Apple Watch support, the export format and how SweetSpot makes predictions were checked against huckleberrycare.com/pricing, the Huckleberry App Store listing, Huckleberry's SweetSpot explainer and Huckleberry's export instructions. Where a row says something is not in Huckleberry's listing, their own published description does not mention it.
Where Huckleberry is the better choice
Choose Huckleberry if a true native app matters to you - widgets, an Apple Watch companion, voice logging, or an AI assistant. If you want a paid, custom sleep plan built from your logs alongside tracking, Huckleberry offers that and I do not.
Where Rhythm is different
Predictions without a subscription, and without "AI".
Rhythm starts with an age-based range, then switches to your baby's own history as soon as there is enough of it, separately for each nap and for bedtime. It runs on your phone, so it works on a plane or on hospital wifi. Every number says whether it came from an age default, logged sleep, or a setting you chose. If it looks wrong, override it.
Your baby's data starts on your device.
If you sync, a copy lives on my servers; it is encrypted in transit, with encrypted offsite backups. No ads, no tracking pixels, no data sales. Export CSV or JSON any time.
Switching from Huckleberry
You do not have to start over. Export your data from Huckleberry (it comes through as an email), then in Rhythm open Settings, Import Data, Huckleberry, and upload the file. Sleep, feeds, diapers, pumping, medicine, and nine more record types come across, so your history and your patterns move with you. See which records import and follow the step-by-step guide.
Questions
What does Rhythm cost compared to Huckleberry Plus?
Rhythm sync is $5/mo or $45/year per household. Huckleberry Plus is $11.99/mo or $68.88/year billed annually. If you only want predictions, Rhythm's are free without either.
Can I bring my Huckleberry history into Rhythm?
Yes. Export from Huckleberry (the file arrives by email), then in Rhythm open Settings, Import, Huckleberry. Fourteen record types come across, sleep, feeds, diapers, pumping, and medicine among them; the import guide lists exactly what moves.
Does Huckleberry's SweetSpot know how long my baby takes to fall asleep?
No. SweetSpot's own explainer describes a target sleep time built from your baby's logged sleep and age-appropriate guidelines, then tells you to subtract your own routine and settle time to find your put-down time. Rhythm logs put-down duration directly and does that subtraction for you, once it has enough recent put-downs to go on.
What does Huckleberry offer that Rhythm does not?
A native iPhone app, home-screen widgets, an Apple Watch companion, voice logging, an AI assistant, and a paid custom sleep plan built from your logs. Rhythm trades those for instant browser access, free predictions, and local-first privacy.