Is there a free baby sleep tracker with wake windows?

Nara Baby documents free configurable wake-window reminders. Baby Daybook includes a free next-sleep prediction, with full-day predictions on Premium. ParentFlow offers free sleep logging, summary and trends, while Sleep Planner is Premium. A reminder and a prediction are different features.

Does Huckleberry's nap prediction cost money?

SweetSpot is included in paid Plus and Premium for babies two months and older. Free includes basic tracking and reports. Premium adds expert-designed personalized sleep plans and Berry chat. Confirm current trial and renewal terms directly with Huckleberry.

Does ParentFlow's Sleep Planner work in a browser?

No. Sleep Planner is a Premium native-app feature. ParentFlow's web app includes everyday tracking, daily summary, trends and Ask Flo, but not Sleep Planner. Check the native app on your device before purchasing for that feature.

Are baby sleep predictions accurate?

This guide has not measured prediction accuracy or compared sleep outcomes. Predictions are estimates affected by the available records, settings and day-to-day variation. Follow your baby's needs and your clinician's advice rather than treating an app's timing as a requirement.

Choosing an App

Best Baby Sleep Tracker Apps (2026): Logging vs Planning

Start by deciding whether you want to remember sleep times, receive a reminder, estimate the next nap or follow an expert-designed plan. These are different services, with different free limits. A prediction is a planning aid, not proof that your baby should sleep at that time.

Short answer: Nara Baby offers free sleep logs and configurable wake-window reminders. Baby Daybook documents a free next-sleep prediction. Huckleberry's SweetSpot is on Plus or Premium, while ParentFlow's native-app Sleep Planner is Premium. Napper offers both Free and Unlimited plans. Choose the specific feature you need, not the largest list of promises.

6 min read Choosing an App Updated September 6, 2026

Publisher disclosure and method: ParentFlow publishes this guide and sells one of the products compared. This is not an independent ranking. Official product pages, support documents and store listings were reviewed on September 6, 2026, not through hands-on app tests or paid-plan trials. ParentFlow plan limits follow product-owner confirmation on that date. We have not verified clinical outcomes, prediction accuracy or every device's feature parity. See our editorial standards.

Sleep logging, reminders and predictions are different

Choose the job before choosing a subscription.
What you need	What the feature does	What it does not establish
A sleep log	Records start and end times so you can review naps and nights.	Why a baby woke or whether their sleep is medically normal.
A wake-window reminder	Alerts you after a selected amount of awake time or at a chosen clock time.	That the selected interval fits every day or every baby.
A sleep prediction or planner	Estimates timing using age, settings or recorded sleep, depending on the app.	A guaranteed nap, fewer wakings or a safe reason to delay a feed.
An expert-designed plan	Provides a distinct service with its own scope and eligibility.	A medical diagnosis or a substitute for care from your child's clinician.

Compare current free and paid sleep features

Official-document review, September 6, 2026. No timing-accuracy or hands-on app ranking.
App	Sleep feature and plan boundary	Practical fit and trade-off
Nara Baby	Free logs and configurable recurring nap reminders. Its wake-window mode adjusts reminders from the last recorded wake time.	Consider it for free mobile tracking and family sharing. You choose the reminder schedule; this is not an expert-designed plan or a verified AI prediction service. Official FAQ.
Baby Daybook	Free logging and the next predicted sleep. Premium adds the full remaining-day prediction, family sync and expanded history. Predictions begin at two months.	Consider it if you want to try a next-sleep estimate without paying. Family sync is Premium; linked caregivers share one subscription's benefits. Documented feature split.
Huckleberry	Free tracking and reports. Plus adds SweetSpot for babies two months and older; Premium adds expert-designed personalized plans and Berry chat.	Consider it for those specific paid sleep services. A Premium sleep plan is not a promise of one-to-one live consultation; check the service scope. Official plans.
Napper	Its official pricing page lists Free and Unlimited, including age-based schedules and sleep-analysis/personalization features in its comparison.	Consider it for a sleep-focused schedule and sound/course options. Verify exactly which scheduling features your Free or paid plan includes before starting a trial; this review did not validate in-app entitlements. Current plan table.
ParentFlow	Free sleep logs, daily summary and trends. Sleep Planner is Premium and runs in the native apps, not the web app.	Consider it when sleep logs need to sit alongside feeds and a shared care record. One invited caregiver is free; additional caregivers are Premium. Planner scope and setup.

All five vendors document mobile apps for iPhone and Android. ParentFlow also documents browser logging; that does not put its Sleep Planner in a browser. Browser logging was not confirmed for the other four in the sources reviewed here. “Not confirmed” is not the same as “unavailable.” Confirm device-specific features and current checkout terms; no stale dollar estimates are used in this comparison.

A sleep-tracker check you can run over three days

Check the record first. Log actual sleep start and end times, correct a forgotten timer and make sure the dates and time zone are right. Do not change the record to match a prediction.
Check the second caregiver. Ask them to find the latest nap and correct a sample entry. Check whether the plan includes sharing and whether it uses separate logins. Our caregiver comparison explains the differences.
Check the output you will pay for. Is it only a next-nap estimate, the rest of today's schedule or an expert-designed plan? Record whether it is useful for your routine, without treating three days as a clinical test of better sleep.
Check the exit. Review available history, export options, trial renewal and cancellation before subscribing. A printable sleep schedule can be a simple comparison baseline.

Where ParentFlow fits, and where it may not

ParentFlow fits families wanting free everyday sleep and feeding records across phones and web, with a Premium planner available in the native apps. Free also includes one invited caregiver and five Ask Flo questions per month. Notes and To-Dos, plus CSV/PDF export, need Plus or Premium; Free does not include export. Export availability across devices has not been confirmed. Unlimited Ask Flo, extra caregivers and Sleep Planner are Premium. See the feeding tracker comparison if handoffs include bottles and pumping.

If you need a free prediction, compare Baby Daybook's documented next-sleep feature. If you want a distinct expert-designed plan, review Huckleberry's paid services. If you only need reminders, Nara may be enough. None of these feature descriptions demonstrates that one product improves every child's sleep.

Sleep safety is separate from timing. For infants, use a separate, firm, flat sleep surface and place them on their back, without loose bedding or soft objects, following the AAP's safe-sleep guidance. No tracker makes an unsafe sleep setup safe. Our safe-sleep checklist is a related reference.

For the broader shortlist, see baby tracker apps by family routine. For AI-specific limits, see logging, predictions and chat compared.

Sources & further reading

Official sources checked September 6, 2026. Prices and entitlements should be confirmed at checkout.

Start with a shared sleep log

Try ParentFlow's free sleep logs, daily summary and trends with one invited caregiver. Sleep Planner is Premium in the native apps. The web app is for tracking, summary, trends and Ask Flo; it does not include Sleep Planner.

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This page is for educational purposes and does not provide a diagnosis or individualized medical care. App suggestions cannot rule out a health concern. Contact your child's healthcare professional with medical concerns.