CrySnap — decode your baby's cry in 3 seconds, hands-free at 3 a.m.

CrySnap is an iPhone app that records your baby's cry and uses a deep-learning classifier to identify the most likely meaning across 9 cry categories. Beyond the cry translation it includes three AI assistants — a pediatric nurse grounded in AAP guidance, a sleep coach for wake windows and regressions, and a lactation consultant for breastfeeding questions. It also has voice mode for hands-free 3 a.m. use and a frequency-calibrated soothing-sounds library. Published by Loveiko Labs. $4.99 per week or $39.99 per year with a 7-day free trial.

89% test accuracy on the 9-class problem under research conditions — clean audio, isolated cry, no background noise. Real-world accuracy is lower because of household noise, microphone distance, and naturally overlapping cry types (a tired baby is often also hungry). CrySnap returns a confidence score with every result and shows the top two candidates when the model is uncertain. We treat the output as a strong starting point for the parent's own intuition, not a definitive verdict. Most experienced parents agree with the app most of the time; the value is the speed and the reduction of "I have no idea where to even start" paralysis.

Hungry, tired, gas or burping, colic, discomfort (diaper, temperature, clothing), pain, overstimulated, lonely or contact-seeking, and undefined. The categories are based on documented infant cry research and the model's training labels. Every result page includes the category, a confidence score, and a typical next step.

The model is a convolutional neural network trained on more than 10,000 labeled infant cry recordings from multiple research datasets. It analyzes spectral features (pitch contour, frequency distribution, rhythm, and intensity) over a 5–20 second audio window. The model runs entirely on your iPhone via Core ML — that is why the cry translation works offline. Audio is processed locally and discarded after the result is returned.

No. The classification model runs locally on your iPhone. Audio is never sent to our servers and is discarded after the result. This is a deliberate privacy decision because baby audio is among the most sensitive household data a phone can capture. The pediatric nurse / sleep coach / lactation consultant chat features do use a cloud connection because they rely on large language models, but those text conversations are anonymized and do not transmit audio. Full details are in the privacy policy at love8ko.github.io/crysnap/privacy-policy.html.

Cry classification works fully offline because the model is on-device. The soothing sounds library is offline. Previously-saved sleep, feeding, and diaper logs are offline. The pediatric nurse, sleep coach, and lactation consultant chat assistants require an internet connection because they run on a server, not on your phone. If you start a chat at 3 a.m. with no WiFi, the cry translation will still work; the chat will queue until you reconnect.

The pediatric nurse uses a large language model with a system prompt grounded in publicly available American Academy of Pediatrics (AAP) guidance — current safe sleep recommendations, age-by-age developmental milestones, fever thresholds by age, normal vs concerning behavior patterns, and standard pediatric first-aid procedures. Every response that mentions a medical symptom includes a "when to call your doctor" trigger. The AAP does not endorse or sponsor this app; we reference their publicly available guidance the way any health-information service does.

The sleep coach assistant offers age-appropriate wake windows, nap-schedule templates, sleep environment recommendations, and walkthroughs of common methods (Ferber, gentle, no-cry, chair method, pick-up-put-down). It does not provide one-on-one consultations, does not have long-term sleep data the way a paid sleep consultant would after a multi-day evaluation, and does not promise specific outcomes. For complex cases (medical sleep disorders, severe regression, special needs), a human sleep consultant or pediatric sleep clinic is still the right resource.

The lactation consultant assistant provides reference information on common breastfeeding challenges — latch positioning, supply concerns, cluster feeding, pumping schedules, weaning, mastitis warning signs, when to seek hands-on help. It cannot watch your baby latch on a video call or check tongue tie the way a board-certified International Lactation Consultant (IBCLC) can. For latching pain that does not improve, suspected tongue or lip tie, persistent supply concerns, or any nipple infection, see an IBCLC in person.

Voice mode is a hands-free mode for the 3 a.m. moment — when your baby is crying, you are holding her, and you cannot open your eyes enough to read a phone screen. Tap one button on the lock screen and just talk. The assistant responds out loud in seconds. It is built for the moment where you would otherwise be Googling "why is my baby crying at 3am" with one hand. Voice mode is available for all three AI assistants.

The library includes white noise at multiple frequency bands, womb sounds, scientifically calibrated shushing (louder than most parents expect, closer to a vacuum than a whisper), lullabies in English, Spanish, French, and Mandarin, and heartbeat rhythms at maternal resting BPM. Each sound has a documented use case based on published infant soothing research. Effectiveness varies by baby — what works for a colicky 6-week-old often does not work for a 4-month-old in regression — but the library covers the main evidence-based options. All sounds loop offline and run overnight without significant battery drain.

The PDF compiles a structured summary of the past 1–2 weeks of cry events, sleep patterns, feeding logs, diaper output, and any notes you have added. It is formatted for a pediatric appointment — typically a single page front and back — and includes the most recent two weeks of trends rather than raw data. You can export it before a sick visit, well-child checkup, or sleep consultation. The PDF is generated on-device and saved to your Files app; we never see your baby's records on our servers.

Yes — partner sync is enabled by default. Both parents can log feedings, diaper changes, and naps from their own phones, and both see the live cry-translation history and chat conversations. This is especially useful when one parent is at work and the other is home, or for overnight handoffs where both want to know what was tried already. Sync uses iCloud's CloudKit infrastructure with end-to-end encryption — your data stays in your iCloud, not on our servers.

About 5–10% of cries do not classify cleanly — usually because they are mixed (a tired baby who is also hungry) or because the recording captured background noise more than the cry. When the verdict is undefined, the app walks you through the basics: hunger window, last diaper, room temperature, time since last nap, last burp. These four to five checks resolve most undefined cases without the model needing to be smarter.

No, and we are explicit about this. CrySnap is a parenting companion, not a medical device. It does not diagnose any condition. The pediatric nurse assistant provides AAP-grounded reference information, not personalized medical advice. For any severe symptom — fever in a newborn under 3 months, lethargy, blue lips or fingertips, breathing difficulty, projectile vomiting, refusal to feed for several hours, signs of dehydration, or any rapid change in behavior — call 911 or your pediatrician immediately. CrySnap surfaces these triggers in the app for exactly this reason.

Stop using any app and call 911 (or go directly to an emergency room) if your baby has: trouble breathing or pauses in breathing; blue or gray lips, tongue, or fingertips; a temperature over 100.4°F (38°C) rectal in a baby under 3 months; lethargy where she cannot be roused easily; a seizure; a sunken soft spot or sunken eyes (severe dehydration signs); projectile vomiting that does not stop; or any rapid change in behavior or color. These are the exact triggers CrySnap surfaces in the app for the same reason.

The cry classifier is calibrated for ages 0–12 months, with peak accuracy in 0–6 months when the cry types are most distinctive. After 12 months babies cry less and for more contextual reasons, and a cry-translation app becomes less useful — but the sleep coach and pediatric nurse assistants remain useful through age 2–3 for wake windows, sleep training, weaning, and developmental questions. After age 3, a different category of app is more appropriate.

$4.99 per week or $39.99 per year, both with a 7-day free trial. The weekly tier is for the parent who needs the app intensely through the first 8–12 weeks of crying and may want to cancel after. The annual tier works out to about 77¢ per week and makes sense through the full first year when sleep regressions, growth spurts, and milestone changes keep coming. Both include unlimited cry translations, all three AI assistants, voice mode, the sounds library, partner sync, and pediatrician PDF export.

On your iPhone: Settings → tap your name at the top → Subscriptions → find CrySnap → Cancel Subscription. The cancellation takes effect at the end of the current billing period — the app continues working until then. To avoid being charged after the trial, cancel at least 24 hours before the trial ends. If you cancel within the trial, you are not charged.

Nanni AI by Ubenwa Intelligence Solutions is the most-installed dedicated baby cry translator on the App Store and is built around clinical credibility — they collaborate with neonatologists and emphasize their medical research provenance. They also offer a free tier with limited cry translations. CrySnap is built around a different angle: three AI assistants (pediatric nurse, sleep coach, lactation consultant) plus a voice mode for hands-free 3 a.m. use, plus on-device audio processing for stronger audio privacy. Nanni's strength is clinical authority; CrySnap's strength is the platform breadth and hands-free experience.

CrySnap is built by Loveiko Labs, an indie iOS studio in Pattaya, Thailand, founded in 2024 by Valeriy Loveyko. The studio publishes around a dozen single-purpose AI apps including JewelSnap, WatchSnap, BumpCheck, PestSnap, and VeriBag. CrySnap is funded entirely by user subscriptions — no advertisers, no data sales, no banner ads. The "no data selling" commitment is in the privacy policy.