Frequently Asked Questions

Is it safe to play music for my baby while sleeping?

Yes, with three simple precautions: keep the volume at or below 50 decibels (about the level of a quiet conversation), place the device at least 7 feet (2 meters) away from the crib, and use a timer so the music doesn't play all night. The American Academy of Pediatrics recommends these guidelines to protect your baby's developing hearing.

What's the best volume for baby sleep music?

50 dB or lower measured at your baby's head. A 2014 study in Pediatrics found that many sound machines can exceed 85 dB at close range — as loud as a food blender. Use a free decibel meter app on your phone to check the level from the crib. A simple rule: if you have to raise your voice to be heard over the music, it is too loud.

Should I play music all night or use a timer?

Most experts recommend using music during the bedtime routine and for the first 30–60 minutes of sleep, then letting it fade out. The Baby Sleep app includes a sleep timer with gradual fade-out (0–10 minutes) so the volume decreases smoothly rather than stopping abruptly. Continuous music all night can become a sleep crutch, and waking in sudden silence can briefly disorient a baby.

What tempo is best for baby sleep music?

Music with 60–80 beats per minute (BPM) is ideal — it matches the resting human heart rate. This tempo range encourages a process called entrainment, where the body's rhythms naturally slow down to match the music. Classical adagio and andante pieces fall naturally into this range.

Can I use headphones or earbuds for my baby?

No. Never place headphones or earbuds on a baby or young child. Their ear canals are short and delicate, and there is no safe way to control the volume reaching the inner ear. Always use a speaker placed at a safe distance.

Which is better: classical music or white noise?

They serve different purposes. White noise masks environmental sounds (traffic, siblings, dogs) and creates a consistent auditory backdrop. Classical music engages the brain's emotional and bonding systems, signals sleep through familiar melodies, and actively reduces stress hormones like cortisol. Many parents use both: classical music for the bedtime routine and the first part of sleep, then transition to white noise or silence for the rest of the night. The Baby Sleep app includes both classical music and ambient layers (rain, wind, ocean, white, pink and brown noise, and more) — you can use them together or separately.

What if white noise doesn't work for my child?

Some children simply do not respond to white noise. Their brains may need more structured auditory input. Classical music provides rhythm, melody, and dynamic variation that give the developing brain something to track. Research from the University of Washington found that babies exposed to waltz-time music improved their ability to detect rhythmic patterns in both music and speech. If white noise does not work for your child, it is not your fault — try classical music instead.

Does classical music really make babies smarter?

The original "Mozart effect" — the claim that listening to Mozart permanently raises IQ — has been debunked. What the research actually shows is that classical music improves sleep quality, reduces stress, stabilizes heart rate, and increases cerebral oxygenation. These benefits matter far more for a developing child than a temporary IQ bump. For the full research breakdown, see our Science page.

Is this a subscription? How much does it cost?

Free for 7 days, then $11.99 to unlock — once. No subscription, no ads. After the one-time unlock you own it forever.

Does the app work offline?

Yes. All 27 classical tracks, every ambient sound, and your voice recordings are stored on your device. No internet connection is needed after installation. Perfect for travel, camping, or nighttime use when Wi-Fi is unavailable.

Can I use the app on multiple devices?

If you use the same Google account on multiple Android devices, the purchase carries over. Many parents install it on an old phone and use it as a dedicated sleep station with airplane mode enabled.

Is there a free trial?

Yes. The app is free for 7 days with every feature unlocked — no card or account needed to start. After the trial, one purchase of $11.99 keeps everything forever. (Google Play also offers a refund window, typically 2 to 48 hours depending on your region.)

What is the difference between the Classic and ADHD versions?

The ADHD version is a separate app made for children with ADHD: its own music — tracks composed specifically for kids with ADHD — plus a calmer green color scheme (less visually stimulating) and its own set of animal illustrations. If your child has ADHD, autism, or sensory sensitivities, the ADHD version may be the better fit. Both are a one-time unlock after a free trial — no subscription.

Can I record my own voice?

Yes. The app includes a built-in voice recorder. You can record yourself singing, reading a story, or simply saying goodnight. Your voice is the most comforting sound your baby knows — hearing you from another room provides real comfort. The recording plays on loop and mixes seamlessly with the music and ambient sounds.

How does the sleep timer work?

You choose the total duration (15, 30, 45, 60 minutes, or custom) and a fade-out period (0–10 minutes). The music plays at full volume for the set time, then gradually fades to silence over the fade-out period. This gentle transition helps your child stay asleep rather than waking to an abrupt stop.

Does the night light stay on all night?

The night light runs independently of the music. You can turn it on during the bedtime routine and turn it off once your child is asleep, or let the app continue playing music with the screen off. The breathing animation with pulsating stars, circles, and shapes is designed to be hypnotic and calming without being overstimulating.

What Android version do I need?

The app requires Android 6.0 (Marshmallow) or newer and works on both phones and tablets.

Can I use the app with twins?

Absolutely. A single phone or tablet placed at a safe distance (7+ feet) from both cribs will be audible to both children. The sound level drops with distance, so check the dB reading at both sleeping positions if the cribs are far apart. Alternatively, use two old devices on the same Google account — the purchase carries over to multiple devices.

Does the night light drain the battery quickly?

The night light uses more power than audio-only playback, but the app is designed to run with the screen off once your child is asleep. For a dedicated sleep device kept on a charger, battery life is not an issue — just keep it plugged in with airplane mode enabled. If you are using your main phone, you can turn the night light off after your child falls asleep and let the music continue with the screen off.

What if my child wakes up when the music stops?

This is why the gradual fade-out is so important. The app does not stop abruptly — it lowers the volume to zero over 0–10 minutes (you choose the duration). By the time the music ends, your child is in deep sleep and the silence is natural, not sudden. If your child still wakes, try a longer fade-out (5 or 10 minutes) or reduce the total timer duration so the music ends during deeper sleep.

Is screen time from the night light bad for my baby?

The night light uses soft, pulsating colors — it is not a high-stimulation screen like a TV or tablet. The American Academy of Pediatrics distinguishes between passive visual exposure (like a dim night light) and active screen time (interactive apps, videos). The night light is designed to be hypnotic and calming, not engaging. That said, if you are concerned, you can turn the night light off once your child is drowsy and let the music continue with the screen dark.

Can I use this app for naptime too?

Yes. Using the same music for both naps and nighttime reinforces the sleep association. During the day, you may want a shorter timer (15–20 minutes) and lower volume since daytime sleep is naturally lighter. Many parents use the same playlist for both — consistency is key.

What if my child has a medical condition or special needs?

Always consult your pediatrician before introducing any new sleep intervention for a child with medical conditions. That said, music therapy is widely used in hospitals and NICUs for infants with a broad range of conditions — even premature babies born at 29 weeks have been studied with positive results. The ADHD version of the app (calmer green color scheme and its own music composed for children with ADHD) was designed specifically with sensory sensitivities in mind.

Can I customize the playlist?

Yes. You can create and name custom playlists from the 27 tracks, save them, and reorder songs. The default playlist cannot be renamed, but you can create as many custom playlists as you need.

How do I introduce music into my baby's bedtime routine?

Consistency is key. Play the same music at the same point in your routine every night — for example, after the bath and feed, as you lay your baby down. Within a week, your baby will associate these specific melodies with sleep. Keep the volume low, dim the lights, and stay present for the first few minutes.

When should I start playing music for my baby?

You can start during pregnancy — babies can hear external sounds from the third trimester. A 2013 Finnish study showed that babies remember melodies heard in the womb, with stronger brain responses at birth and at 4 months of age. After birth, you can start playing music from day one as part of a gentle sleep routine.

How long should I play music each night?

30–60 minutes is generally sufficient for the bedtime routine and falling asleep. The Children's Hospital Los Angeles recommends no more than 4 hours of music exposure per day for newborns, with 30-minute sessions followed by breaks. Watch for signs of overstimulation: grimacing, turning red, excessive yawning, or splayed fingers — these mean it is time for quiet.

Will my baby become dependent on music to sleep?

Any sleep association can become a dependency if used exclusively. To avoid this, use the sleep timer with fade-out so the music ends while your baby is still asleep. This way, your baby learns to sleep in silence too. Also vary the routine occasionally — sometimes shorter, sometimes quieter — so your child does not learn to need exactly one specific condition.

What if my baby still won't sleep?

Sleep difficulties can have many causes: teething, developmental milestones, illness, separation anxiety, or simply a phase. Music is a powerful tool, but it is not a cure-all. If sleep problems persist for more than 2–3 weeks, consult your pediatrician to rule out underlying issues like reflux, allergies, or sleep apnea.