Two iPhones. One Baby Monitor.
Zero Subscriptions.
EarHorn turns any two iPhones into a secure, private baby monitor app — the one that's already in your pocket when you're traveling, visiting family, or anywhere you don't have your nursery setup. No extra hardware. No cloud accounts. No monthly fees. No constant white noise stream in your ear.
Coming April 2026One-time purchase. Available on iPhone.
Your baby's audio is designed to stay on your home network.
EarHorn streams audio directly between your devices over your home WiFi — no cloud servers, no accounts, no audio data leaving your network. By design, audio only travels between your paired devices and never passes through our servers. The baby device always shows how many parents are connected, so you can verify at a glance that only your devices are listening.
Set up in under a minute.
Choose roles
Tap "Baby" on the nursery phone, "Parent" on yours.
Pair with a code
Enter the 6-character code to connect securely.
Start monitoring
EarHorn listens and streams audio when it detects sound above your threshold.
That's it. No account to create. No WiFi camera to mount. No subscription to start.
Built for everywhere your nursery camera isn't.
Hear What Woke the Baby
Hear what triggered the alert — not an hour of white noise. EarHorn only streams audio when sound crosses your threshold, so your baby's sound machine isn't playing in your living room all evening. When something louder breaks through, you hear exactly what triggered it thanks to a 1-second pre-roll buffer. Smart filtering is designed to reduce false alarms from brief noises.
See the Nursery at a Glance
5 minutes of sound history, live. A rolling audio graph shows you whether the nursery has been quiet or restless. Adjust the sensitivity threshold right from your device — no tiptoeing back to the nursery.
Background Alerts That Work
Get notified even when the app isn't open. Push notifications alert you when sound is detected, even if you've switched to another app. Battery alerts warn you before the baby device dies, and disconnection alerts let you know if the connection drops.
Connect the Whole House Beta
Multiple parents, one baby monitor. Both parents can listen simultaneously from separate devices. Perfect for a two-story house or when grandparents are visiting. (Multi-parent support is in beta testing.)
Where EarHorn fits in.
EarHorn isn't a replacement for a nursery camera — it's the monitor you have with you everywhere else.
| EarHorn | Hardware Monitors | Cloud Monitor Apps | |
|---|---|---|---|
| No extra hardware | Yes | No | Yes |
| No subscription | Yes | Varies | Rarely |
| Audio stays local | Yes | Yes | No |
| Encrypted connection | Yes | Varies | Varies |
| Multiple parents | Beta | Usually 1 | Varies |
| No constant white noise stream | Yes | No | Rarely |
| Pre-roll audio (hear what triggered the alert) | Yes | No | No |
| Battery alerts | Yes | N/A | Some |
Comparisons reflect general product category characteristics as of March 2026 and may not apply to all products.
Common questions
Does EarHorn work without WiFi?
EarHorn requires both devices to be on the same WiFi network for audio streaming. Push notifications (for when the app is backgrounded) require an internet connection, but the core monitoring works entirely over your local network.
How secure is the connection?
EarHorn uses P-256 elliptic curve cryptography, a widely-used industry standard recommended by NIST. Devices authenticate each other directly with a 3-step cryptographic handshake. Encryption keys never leave your phone.
Can I use an old iPhone as the baby unit?
Yes. Any iPhone running iOS 16.7 or later works. That old iPhone 8 in your drawer is a great baby monitor.
Why doesn't EarHorn have video?
By design. No camera means no video to hack, no cloud storage of nursery footage, and dramatically better battery life. Audio is what matters at 3 AM — you need to know if your baby is crying, not watch them sleep.
Ready to monitor?
Get notified when EarHorn launches.
We'll only email you once — on launch day.
Available for iPhone. Requires iOS 16.7 or later.
EarHorn is a convenience tool for audio monitoring and is not a substitute for attentive supervision. See our Terms of Service for important safety information.