AI-powered sleep tracking, milestone detection, and growth insights — personalized to your child from the very first day.
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"Notes app, five alarms, a baby journal, and still anxious at 3am."
One calm screen shows everything. Always updated. Always clear.
"You don't know if the sleep regression is normal or something more."
Lunara's AI compares against 340M data points. You'll know.
"Milestones come and go before you realize the window was open."
We tell you 2 weeks before each window opens. Never miss one.
One-tap logging builds a complete picture of your baby's sleep architecture. Lunara detects pattern shifts 3–5 days before regressions peak — giving you time to prepare, not react. See all AI features →
Not a dashboard. Not charts you have to interpret. Lunara's AI reads your data and writes you a plain-English weekly digest — the way a trusted friend who happens to be a pediatrician would. Our science-backed approach →
Emma's deep sleep is 22% longer when bedtime is 7:15 PM vs 7:30 PM.
A growth spurt typically follows in the next 7–10 days based on current sleep patterns.
First words window opens in ~2 weeks. Start narrating daily activities to accelerate.
50+ developmental milestones, age-calibrated to your child. Photo memories. Personalized timelines. Gentle alerts when each window opens. Never miss a first smile again. View pricing plans →
Find parenting calm and clarity from the very first day.
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Lunara is an AI-powered baby sleep tracker that logs every nap and night session, predicts sleep regressions 3–5 days before they peak, and delivers personalised weekly insights calibrated to WHO and AAP developmental standards — free to start, available on iOS and Android.
A baby sleep tracker records every nap and night session to build a complete picture of your infant's rest over time. Lunara goes further: its AI compares logged data against age-appropriate WHO norms and identifies the exact bedtime window where your baby consistently sleeps longest — precise to 15 minutes. Explore all tracking features →
Sleep regressions follow predictable developmental windows — 4 months, 8 months, 12 months, 18 months. Lunara monitors micro-changes in your baby's sleep architecture up to 5 days before a regression peaks, so you can adjust routines proactively rather than troubleshooting at 3am. Our science-backed approach →
Every milestone timeline, sleep benchmark, and feeding schedule in Lunara is grounded in WHO Child Growth Standards and AAP Safe Sleep Guidelines. Our AI surfaces insights; our evidence base ensures they are safe, accurate, and appropriate for your child's exact developmental stage. Start free today →
Lunara processes every logged nap, night session, and feeding against a dataset of 340+ million tracked sleep sessions. The AI identifies patterns specific to your baby's age, weight, and developmental stage — then surfaces actionable insights in plain language. It also monitors for early signs of sleep regressions, growth spurts, and milestone readiness, notifying you days before you'd otherwise notice.
Lunara supports every stage from Newborn (0–3 months) through Toddler (up to 5 years). Sleep benchmarks, milestone timelines, and feeding guidance all adjust automatically as your child grows — based on WHO developmental standards — with no manual configuration required from you.
Yes — Lunara's core tracker is free forever with unlimited sleep and feeding logging, 90-day history, and basic milestone tracking. Our Premium plan ($4.99/month or $39/year) adds AI sleep regression prediction, advanced milestone coaching, full growth history, partner sharing, and weekly personalized reports. No credit card required to start.
Yes. Lunara's shared tracking lets both parents, grandparents, and caregivers log and view sleep sessions, feeding, and milestones in real time — so nothing is missed on handover nights or when you're away. All data syncs instantly across all connected devices.
Basic trackers log data. Lunara interprets it. Our AI connects sleep quality to developmental leaps, predicts regressions 3–5 days before they peak, and identifies the exact bedtime window where your baby consistently sleeps longest — precise to 15-minute intervals. You get weekly reports that explain what changed and why, written in calm, clear language that replaces the 3am Googling.
A baby sleep tracker is a digital tool that records the start and end time of every nap and night-time sleep session, then analyses that data against age-appropriate WHO and AAP benchmarks to help parents identify patterns, predict sleep regressions, and optimise their baby's rest — without a wearable device.
Recommended sleep totals by age, based on the American Academy of Pediatrics (AAP) and World Health Organization (WHO) guidelines — automatically applied inside Lunara.
| Age Stage | Total Sleep / 24 h | Night Sleep | Daytime Naps | Lunara Tracks |
|---|---|---|---|---|
| Newborn 0–3 mo | 14 – 17 hrs | 8 – 9 hrs | 3 – 5 short naps | Feed-triggered wakes & night stretches |
| 3 – 6 Months | 12 – 15 hrs | 10 – 11 hrs | 3 naps | Nap consolidation & wake-window length |
| 6 – 12 Months | 12 – 14 hrs | 11 – 12 hrs | 2 naps | 4 → 2 nap transition readiness |
| 1 – 2 Years | 11 – 14 hrs | 11 – 12 hrs | 1 nap | Nap-drop signals & regression windows |
| 2 – 3 Years | 10 – 13 hrs | 10 – 12 hrs | 0 – 1 nap | Independent sleep-onset milestones |
Source: American Academy of Pediatrics (AAP) & World Health Organization (WHO). Individual needs vary — always consult your paediatrician.
Babies don't run on adult schedules — they run on wake windows. A 4-month-old can handle 90 minutes of wakefulness; a 12-month-old needs closer to 3.5 hours. Lunara calculates the ideal nap start time based on your baby's last wake, not an arbitrary time of day — so you stop guessing and start seeing longer, more restorative sleep.
The 4-month, 8-month, and 18-month sleep regressions aren't behaviour problems — they're developmental leaps. Rapid brain reorganisation disrupts sleep architecture, often for 2–6 weeks. Lunara detects the early data signature (more frequent night wakes, shortened naps) 3–5 days before the full regression peaks, giving you time to adjust expectations and routines.
Overtiredness is the single biggest driver of bedtime battles and early-morning wake-ups. Lunara analyses your baby's historical data to identify the exact 15-minute window where they consistently fall asleep fastest and sleep longest. Miss it by 20 minutes and cortisol spikes — making sleep harder, not easier.
Not all baby trackers are created equal. Here's how Lunara stacks up against the most popular alternatives — feature by feature.
| Feature | Lunara | Huckleberry | Glow Baby | Baby Tracker Nara |
|---|---|---|---|---|
| AI sleep pattern analysis | ✓ | ✓ | Partial | ✕ |
| Sleep regression early warning | ✓ | Partial | ✕ | ✕ |
| Developmental milestone tracking | ✓ | ✕ | ✓ | Partial |
| Growth percentile charts (WHO) | ✓ | ✕ | ✓ | Partial |
| Real-time partner sharing | ✓ | ✓ | ✓ | ✓ |
| Weekly AI insight reports | ✓ | Partial | ✕ | ✕ |
| Free plan (no credit card) | ✓ | Limited | ✓ | ✓ |
Feature comparison based on publicly available information as of June 2026. Competitor features may have changed — verify at each app's website.
You can start tracking from Day 1. Newborns don't have a circadian rhythm yet — tracking from birth builds a data baseline so Lunara can detect the moment a pattern starts to emerge, usually between 6 and 10 weeks. The earlier you start, the earlier you'll spot regressions and consolidation windows.
According to AAP guidelines, a 6-month-old typically needs 12–14 hours of total sleep per 24 hours, usually split into 11–12 hours at night and 2–3 hours across two daytime naps. Lunara compares your baby's logged totals against this range daily and flags any consistent shortfall or excess worth discussing with your paediatrician.
A sleep regression is a temporary period of disrupted sleep triggered by rapid neurological development. Common windows are 4 months, 8–10 months, 12 months, 18 months, and 2 years. During a regression, babies who previously slept well suddenly wake more often and resist settling. Lunara detects the early data signature 3–5 days before the regression peaks — shorter naps, more frequent night wakes, increased fussing — so you can adjust your routine before the worst nights hit.
Yes — tracking is the foundation of any sleep-training approach. Before you begin, Lunara identifies your baby's current wake windows, natural sleep pressure curve, and optimal bedtime. This means you're not starting sleep training against an overtired baby at the wrong time of day, which is the most common reason programmes fail. Lunara doesn't prescribe a training method — it gives you the data to apply whichever approach your family and paediatrician choose.
Lunara is a wellness and pattern-tracking tool — not a medical device. It is designed to help parents understand normal developmental variation in sleep and notice when something is worth raising with a healthcare professional. It does not diagnose conditions, replace paediatric consultations, or provide medical advice. If you are concerned about your baby's breathing, weight gain, or development, always consult a qualified healthcare provider.
Yes. Lunara works entirely through manual logging — no wearable, sensor, or extra hardware required. Simply tap to start and end each sleep session on your phone. Research consistently shows that parent-reported sleep data tracked consistently is as useful for pattern analysis as sensor data, and removes the cost and battery anxiety that come with wearable devices.
The information above is for general educational purposes only and does not constitute medical advice. Consult your paediatrician for concerns about your baby's health or development.
I'd tried two other baby apps before Lunara and they just logged data with no meaning. Lunara was the first one that told me what the data actually meant. When it warned me about the 4-month regression three days before it hit, I nearly cried with relief — I was prepared instead of blindsided.
Twin life is chaos. Between the two of us doing night shifts, we were logging in two different places and had no idea what the other had seen. Partner sharing in Lunara changed everything. Both babies' data in one place, both of us reading the same AI summary every morning. First time we've felt like a team since they arrived.
My toddler went through a brutal sleep regression at 18 months and I was spending hours googling every night. Lunara gave me a clear explanation of what was happening developmentally and the exact optimal bedtime for her age. Within two weeks of following the AI suggestions we had our evenings back.
Purpose-built for the 0–3 month stage — log every feed-triggered wake, track sleep stretches, and watch the circadian rhythm emerge.
Explore →WHO-based developmental milestones from first smile to first words — with AI-generated context for every stage your baby reaches.
Explore →Plot weight, length, and head circumference against WHO percentile curves — and receive an AI commentary after every measurement.
Explore →Track breast, bottle, and solids in seconds. Lunara surfaces feeding-to-sleep correlations that explain unexplained wakes.
Explore →Everything you need to know about the 4-month, 8-month, and 18-month regressions — causes, signs, and what actually helps.
Read the guide →An honest comparison of the top baby sleep tracker apps in 2026 — features, pricing, and which age stages each serves best.
Read the comparison →Content last reviewed: June 2026 — Baby Sleep Tracker
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